Item documentation for Honeywell Enraf series 854 Level Gauges, 97x series SmartRadars Gauges and 877 Field Display & Interface

Transcription

1 Item documentation for Honeywell Enraf series 854 Level Gauges, 97x series SmartRadars Gauges and 877 Field Display & Interface August 2013 Part no: Revision 5 Enraf BV PO Box AV Delft Netherlands Tel : Fax : hfs-tac-support@honeywellcom Website : Item documentation Page 1

2 Copyright Enraf BV All rights reserved Reproduction in any form without the prior consent of Enraf BV is not allowed This manual is for information only The contents, descriptions and specifications are subject to change without notice Enraf BV accepts no responsibility for any errors that may appear in this manual The warranty terms and conditions applicable in the country of purchase in respect to Enraf BV products are available from your supplier Please retain them with your proof of purchase Page 2 Item documentation

3 Preface Preface This manual has been written for the technicians involved in the commissioning and service of the Honeywell Enraf series 854 level gauges, series 97x SmartRadar gauges and 877 Field Display & Interface For installation and commissioning instructions of the instrument, please refer to the installation guides and instruction manuals of the applicable instruments and to the option manuals This document only gives the item description of the basic level gauge and all its options For an overview, refer to Appendix B related documents Safety and prevention of damage Safe execution of the procedures in this manual requires technical experience in handling tools, and knowledge of safety regulations in handling electrical installation in hazardous environments Warnings, Cautions, and Notes have been used throughout this manual to bring special matters to the immediate attention of the reader A Warning concerns danger to the safety of the technician or user; A Caution draws attention to an action which may damage the equipment; A Note points out a statement deserving more emphasis than the general text, but does not deserve a Warning or a Caution The sequence of steps in a procedure may also be important from the point of view of personal safety and prevention of damage; it is therefore advised not to change the sequence of procedural steps or alter a procedure Legal aspects The information in this manual is copyright property of Enraf BV, Netherlands Enraf BV disclaims any responsibility for personal injury or damage to equipment caused by: Deviation from any of the prescribed procedures; Execution of activities that are not prescribed; Negligence of the general safety precautions for handling tools and use of electricity Additional information Please do not hesitate to contact Honeywell Enraf or its representative if you require additional information Item documentation Page 3

4 Table of contents Table of contents Preface 3 1 Introduction 5 2 Level items 6 21 Common level items 6 22 Specific 854 level gauge items Specific 97x SmartRadar gauge items Specific 877 Field Display & Interface items 36 3 XPU items (display, communications) 39 4 Optional function items Servo density items Servo auto test items Analog level output items Spot temperature items for HCU and ICU_HPI Average temperature items (VITO-MTT-LT-MRT) HIMS / HTG items Water bottom items 78 Appendix A ASCII table 82 Appendix B Related documents 83 Item index 84 Page 4 Item documentation

5 Introduction 1 Introduction In this manual the specific instrument items of the following gauges are described: Servo gauges (models 854 ATG and 854 XTG) SmartRadar gauges (models 970 ATi, 971 AT and 973 LT) 877 Field Display & Interface Besides that, the items of all optional functions are described with the following current option boards: servo density analog level output (HPO / HCU boards) spot temperature measurement (HCU / ICU_HPI boards) average temperature measurement with MRT/MTT (HCU / ICU_HPI boards) HIMS / HTG configuration (HCU / ICU_HPI boards) Water bottom measurement (HCU / ICU_HPI boards) A further description can be found in ITEMLIST, and in the help function of the Engauge service tool, both available from Enraf BV (or its representative) The items can be of type N (Novram), D (data), or C (Command) Novram items are items from which the data is stored in the NOVRAM on the XPU board (for instance: the reference level item RL) Data items are items which contain the measured and calculated data (for instance: the radar ullage RU) The measured and calculated data are not stored in NOVRAM Command items are items which results in an action; for instance item RS: resets the instrument Indexed items can be recognized by the column: Elem In that column the number of elements is specified The protection level refers to the protection level 1 or 2 password which is required to issue the item Changes in revision 5 (with respect to previous version) are: deleted items for 873 SmartRadar deleted descriptions of previous option boards MPU, HPU, OPU and HSU deleted descriptions of 862 MIR and 862 MIT added description of 762 VITO MTT/LT, 762 VITO MRT and HCU and ICU_HPI option boards Item documentation Page 5

6 Level items (common) 2 Level items 21 Common level items AH Alarm hysteresis N level 1 determined by item LD (m) The level alarm hysteresis is used to set a hysteresis around the level alarms Refer to HA, HH, LA and LL The software does not check for the size and an eventually negative sign of the hysteresis AR Accept reference C level 2 With the AR command, the 854 level gauge accepts the level, specified in item RL, as the current level The gauge performs a controlled reset, but remains in protection level 2 When the SmartRadar is in calibration mode, and no warning code is active, this command takes the value specified in item RL (reference level) as the indicated radar level Internally, a distance called radar position (item PR), is calculated as: RL + internal offset (antenna parameter) PR corresponds with the nozzle (or manhole) flange height After the AR command, the level "jumps" to its new value The radar level is made equal to the level from item RL, inclusive active compensations After the AR command, the SmartRadar will remain in protection level 2 DE Level type N level 2 1 ASCII character I The level type item selects the type of level which will be shown on the display (if present) and transmitted in the level record to the host via Enraf field bus line, RS232/485 line, or HART communication 1) The level type can be: C : Compensated innage (not with SmartRadar) I : Innage U : Ullage When C is selected, the level is compensated for the hydrostatic deformation of the tank Refer to items HF and HL 1) HART communication only available on 973 SmartRadar LT HA High level alarm N level 1 determined by item LD (m) With item HA, a high level alarm set point can be given When the level exceeds the programmed high alarm setting, a status bit is set in item QS (servo status request), QR (radar status request) or QF (hydrostatic status request) and the character "H" is transmitted in the alarm status byte of the level record To prevent the on/off switching of the high level alarm status, due to variations in the level measurement, an alarm hysteresis is implemented (item AH) The high level alarm status is set when the measured level is higher than the high level alarm set point The high level alarm status is reset when the measured level is lower than the high level alarm set point minus the alarm hysteresis Page 6 Item documentation

7 Level items (common) HF Hydrostatic deformation factor N level 2 mm/m standard floating point format E+00 When the tank is not equipped with a stable mounting stud for installation of the instrument, item HF can be used together with the hydrostatic deformation level (item HL), to compensate the level reading The compensation becomes effective from levels above the setting in item HL In formula: level comp = level - (level - HL) x HF A positive signed HF indicates that the compensation of the innage level is subtracted in order to obtain a compensated level When no compensation is required item HF must contain the default value For the 854 level gauges, the compensated level can be requested by item CQ (compensated innage servo) The compensated innage will be shown on the display and transmitted via the Enraf field bus when item DE (level type) is set to C (compensated innage) For the SmartRadar, the compensated level can be requested by item RI (radar innage) if the compensation switch (item CS) is enabled for hydrostatic deformation (8 th position to H ) The level on the display and on the Enraf field bus or RS232/485 or HART line are automatically adapted when the hydrostatic deformation is enabled in item CS As the alarm levels and the reference level are defined as compensated innage levels, the location of these levels also depends on the setting of the hydrostatic deformation factor HH High high level alarm N level 1 (877) level 2 (854, 97x) determined by item LD (m) With item HH, a high high level alarm set point can be given When the level exceeds the programmed high high alarm setting, a status bit is set in items QS (servo status request), QR (radar status request) or QF (hydrostatic status request) To prevent the on/off switching of the high high level alarm status, due to variations in the level measurement, an alarm hysteresis is implemented (item AH) The high high level alarm status is set when the measured level is higher than the high high level alarm set point The high high level alarm status is reset when the measured level is lower than the high high level alarm set point minus the alarm hysteresis HL Hydrostatic deformation level N level 2 determined by item LD (m) Item HL is the start level for the compensation of hydrostatic tank deformation Refer to HF Item documentation Page 7

8 Level items (common) LA Low level alarm N level 1 determined by item LD (m) With item LA, a low level alarm set point can be given When the level drops below the programmed low alarm setting, a status bit is set in items QS (servo status request), QR (radar status request) or QF (hydrostatic status request) and the character "L" is transmitted in the alarm status byte of the level record To prevent the on/off switching of the low level alarm status, due to variations in the level measurement, an alarm hysteresis is implemented (item AH) The low level alarm status is set when the measured level is lower than the low level alarm set point The low level alarm status is reset when the measured level is higher than the low level alarm set point plus the alarm hysteresis LD Level dimension N level 2 1 ASCII character M Item LD determines the dimension in which the calculated level will be presented All NOVRAM data which contain a level value will have the same dimension and have to be presented in the same format Item LD Dimension Format M m sign X X X sep X X X X F ft sign X X X X sep X X X I inch sign X X X X X sep X X P ft in 1 / 16 sign X X ft X X in X X sign = + or - ft = ' sep = or, X = digit in = " The following dimensions are possible: M : metres F : feet I : inches P : fractions (feet, inches and 1 / 16 of inches) When item LD is changed, all level items must be converted to the new dimension and new format With the XPU-2, that will be done automatically Each dimension has its own format; the formats are listed in the table at the left LL Low low level alarm N level 1 determined by item LD (m) With item LL, a low low level alarm set point can be given When the level drops below the programmed low low alarm setting, a status bit is set in items QS (servo status request), QR (radar status request) or QF (hydrostatic status request) To prevent the on/off switching of the low low level alarm status, due to variations in the level measurement, an alarm hysteresis is implemented (item AH) The low low level alarm status is set when the measured level is lower than the low low level alarm set point The low low level alarm status is reset when the measured level is higher than the low low level alarm set point plus the alarm hysteresis RL Reference level N level 2 determined by item LD (m) The reference level is considered as the true level at the moment the AR (accept reference) command is given RN Relay command D not protected 8 ASCII characters; see below Item RN is used for remote control of the relays The eight bytes (C1, T1, T2, T3, C2, T4, T5, T6) control both relays as follows: C1 (C2) Relay 1 (2) command: T1, T2, T3 (T4, T5, T6) Relay 1 (2) time data field A Activate relay 1 (2) Time setting in seconds for Activate command only D De-activate relay 1 (2) If the time field is set to 000, the relay is continuously activated K Alarm acknowledge For the other commands, dummy values must be specified - Don t change (eg RN=K ) The acknowledge command can only be given when the relay is programmed for level alarm operation The other commands can only be given as the relay is set for remote control Page 8 Item documentation

9 Level items (common) RX Relay status D no write access FF These two bytes (B0 for relay 1, B1 for relay 2) of item RX contain the current setting of both relays: B0 (B1) Status of relay 1 (2) K Acknowledged alarm D De-activated relay A Activated relay T Relay is active with time setting F Relay fail N Relay is not mounted - Initial value (SmartRadar only RY Relay alarm mode N level 1 level 2 (854 XPU A31) 6 ASCII characters; see below HA - LA - (854) HACLAC (877) For 854 and 877 only! The six bytes (A1, A2, M1, A3, A4, M2) of item RY can be used to couple the relays to a level alarm or to set-up the relay for remote control: A1, A2 (A3, A4) Usage of relay 1 (2) M1 (M2) Relay 1 (2) mode (for 854) HH High high level alarm T Relay will always be active if an alarm level is reached HA High level alarm - Relay will only be active if an alarm level is reached and there LA Low level alarm is no test status active LL Low low level alarm W Relay will only be active if an alarm level is reached and there RC Remote control is neither a test status nor a water dip measurement active NM Relay not mounted M1 (M2) Relay 1 (2) mode (for 877) A Relay is active if (alarm status and valid level) or if invalid level or if gauge fail B Relay is active if alarm status (with valid or invalid level) or if gauge fail C Relay is active if (alarm status and valid level) or if gauge fail D Relay is active if (alarm status and valid level) RZ Relay mode N level 1 level 2 (854 XPU A31) 4 ASCII characters; see below DEDE For 854 and 877 only! These four bytes (B0, B1, B2, B3) determine if the relay is energized or de-energized in case of no alarm situation and gauge fail B0 (B2) Operation mode relay 1 (2) B1 (B3) Fail mode relay 1 (2) E Relay energized in case of no alarm situation E Relay energized in case of gauge failure D Relay de-energized in case of no alarm situation D Relay de-energized in case of gauge failure UR Upper reference level N level 2 determined by item LD (m) The upper reference level item is used to calculate an ullage, based on the programmed upper reference value If item DE (level type) is set to U, then the ullage will be displayed in display format A and B and the ullage will be transmitted in the level records The ullage is calculated as: Ullage = Upper reference level level Item documentation Page 9

10 Level items (854) 22 Specific 854 level gauge items BF Average measured frequency D not protected Hz E-99 With this item the measured average frequency can be requested after balance test BT command Refer to BT, BU, BV and DO BL Block C not protected The block command stops the displacer Refer to BM, HC and UN BM Block mode N level 1 1 ASCII character C The block mode selects whether the block command remains active after level I1, I2 or I3 has reached the displacer C : Continuous; the block command will remain active until another operational command with a higher priority overrides the block command N : Non-continuous; the block command will be cancelled if the product reaches the displacer In both block modes (BL and BM) the gauge will check the force on the displacer When a force exceeding 350 gram acts on the sensor the displacer will be lowered to prevent wire rupture BT Balance test C level 2 SPU version A061/A10: The balance test command checks the balance of the measuring drum The measuring drum makes one revolution while the force on the force transducer is measured continuously SPU version A20 and up: To increase the accuracy of the balance test, the force of the sensor is measured at discrete positions (default 8 positions, refer to DO), equally distributed over the circumference of the measuring drum The maximum and minimum forces are stored as BU and BV Upon completion of BT the 854 changes over to a freeze FR situation The minimum free space below the displacer at start of BT is: 400 mm BU Maximum unbalanced weight D no write access grams E-99 Once the balance test has been performed, the maximum force that was found during the measurement can be read in this item Until the first balance test command has been processed by the SPU, this item will contain the default value E-99 Immediately after giving a next BT command, the BU item will be filled again with this default value BV Minimum unbalanced weight D no write access grams E-99 Item BV contains the minimum force measured during the balance test BT Page 10 Item documentation

11 Level items (854) BW Average unbalanced weight D no write access grams E-99 Item BW contains the average force measured during the balance test BT (can be done with displacer) CA Calibrate C not protected The calibrate command performs a calibration test by moving the displacer until it meets the calibration plate of the gauge (above the limit switch) The computed compensated innage level, corresponding to this position, is compared with the known tank top level (item TT) If a difference greater than ± 25 mm is found between these two levels, the result of the calibration test will be a fail The CA command is only operational when the first position in item WT contains an E and it is not disabled in HC CQ Compensated innage servo level D no write access determined by item Item CQ contains the innage servo level, compensated for hydrostatic tank deformation The value is preceded by four status bytes; refer to the description of item QS Refer to items LQ, HF and HL DA Displacer area N level 2 cm 2 standard floating point format E+02 Item DA is the displacer area in cm 2 Minimum value: E+01; maximum value: E+03 DC Drum circumference N level 2 metres standard floating point format E+00 The circumference of the measuring drum, which is engraved in the drum, must be programmed in item DC DH Dip height N level 1 determined by item LD (m) When the 854 operates in dip mode DM, the displacer will be raised after each product dip to a distance DH above the product level There are no limits to the maximum value for the dip height, however, the displacer will never be raised above the motor limit switch high setting (item MH) DM Dip mode C not protected When the gauge is in dip mode the displacer will be set at a distance DH above interface I1 After a fixed time DT a single product measurement will be executed and after measuring the interface level, the displacer will be raised again This sequence will be repeated once every dip time DT In this mode the calculated level items LQ, UQ and CQ will show the last measured product level (when available) and not the actual displacer position The dip mode is cancelled when the one of the three interfaces is selected (I1, I2 or I3) Refer to DH, DT, HC and UN Item documentation Page 11

12 Level items (854) DO Density number of samples (per revolution) N level 2 1 ASCII character F During a BT and a TP command the apparent weight of the displacer is measured over a complete drum revolution With item DO a fixed number of measuring points per drum revolution can be set We recommend to set item DO to 8 Minimum value: 1; maximum value: F DT Dip time interval N level 1 seconds standard floating point format E+02 The dip interval time DT specifies the time in seconds between two measurements in dip mode Refer to DM The minimum value is: E+01; the maximum value is: e+05 DW Displacer weight N level 2 grams standard floating point format E+03 Item DW contains the weight of the displacer in air Request via BT / BW The minimum value is: E+03; the maximum value is: E+03 ER Error restart N level 1 4 ASCII characters; see below BL I1 (XPU A06 - A30) TGI1 (XPU A31 and higher) Item ER specifies how the gauge will start after a reset, not caused by a power failure Except an error situation it could be a RS or an EX command From the 4 characters, the first two contain the desired operational command and the last two the desired default interface Pos 1, 2 Operational command Pos 3, 4 Special command - - No operational command I1 Interface 1 BL Block command I2 Interface 2 CA Calibrate command I3 Interface 3 FR Freeze command DM Dip mode LT Lock test command TG Test gauge command When in ER a command is specified that is disabled in the host command mode (item HC) the gauge starts up with this command ES Error SPU request D no write access 0000 The Error SPU request item contains the last error that occurred in the SPU Refer to the SPU error list below: 0000 Initializing the SPU / no error detected 0024 CC range error 0001 Internal RAM error 0034 DA range error 0002 External RAM error The RAM chip is defect 0044 DC range error A valid drum circumference must be set 0003 EPROM has an incorrect checksum (Replace it) after initialising the NOVRAM 0004 Syntax error Invalid number of parameters The SPU received 0064 DW range error too much parameters during start up Mostly caused by software 0074 DV range error version conflict Check compatibility of XPU & SPU software Page 12 Item documentation

13 Level items (854) 0080 EQ motor position syntax error During start up an incorrect motor position counter value was supplied to the SPU Use AR to solve problem 0081 Syntax error of EQ An incorrect value of the reference encoder position (> 200) was supplied to the SPU during start up Use AR to solve problem 0082 EQ motor field position syntax error An incorrect value of the motor field position (> 7) was supplied to the SPU during start up Use AR to solve problem 0083 EQ Checksum error An incorrect checksum over the EQ item was supplied to the SPU during start up Use AR to solve problem 0104 F0 range error 0114 F1 range error 0124 F2 range error 0134 F3 range error 0154 HF range error 0234 MH range error A too high or too low level was supplied as MH motor limit switch high Verify the DC and RL items if the MH level is correct 0235 MH / ML range error There must be a greater distance between the motor limit switch levels than recently is specified Verify item DC if the MH and ML level items are correct 0244 ML range error A too low or too high level was supplied as motor limit switch low Verify the DC and RL items if the ML level item is correct 0274 RM range error 0284 S1 range error 0294 S2 range error 0304 S3 range error 0314 T1 range error 0324 T2 range error 0334 T3 range error 0364 WW range error 0401 Set-point calculation divide by zero error During further handling of the F0 F3, T1 T3 or S1 S3 items a divide by zero situation occurred Check these items 0402 Floating point overflow error During calculations with the set point items F0 F3, T1 T3 or S1 S3 an overflow situation occurred Check these items 0404 Polynomial constants out of range 1 The specified F0 F3 items are no points of a valid frequency characteristic Check the F0 F3 items and the force transducer 0405 Polynomial constants out of range 2 The specified F0 F3 items are no points of a valid frequency characteristic Check the F0 F3 items and the force transducer 0406 Non convergent Newton Raphson algorithm The set points S1 S3 or the WW can t be transferred to valid frequency s with the internal Newton Raphson algorithm Please check the F0 F3, S1 S3 and WW items 0407 Force transducer initialisation error The force transducer does not start up correctly, or the motor unit has not been unlocked 0414 RF range error 0434 WV range error 0471 MZ divide by zero error An invalid value of the lock test motor limit switch has caused an internal divide by zero situation 0472 MZ floating point overflow error An invalid value of the lock test motor limit switch has caused an internal overflow 0474 MZ range error The MZ level exceeds the theoretical range of the gauge of (RL - MZ) 1260 x DC 0481 DH divide by zero error An invalid value of the dip height has caused an internal divide by zero situation 0482 DH floating point overflow error An invalid value of the dip height has caused an internal overflow 0484 DH range error The DH distance exceeds the theoretical range of the gauge of DH 1260 x DC 0494 DT range error 0500 Stack overflow 1 Unrecoverable SPU error Processor stack too large during scheduling 0501 Stack overflow 2 Unrecoverable SPU error Maximum processor stack size exceeded 0502 Unknown message Unrecoverable SPU error One of the processors has received an unknown intern process message or the SPU has received an unknown command or data item 0503 Empty message queue Unrecoverable SPU error The message queue was empty This can be the result of too much commands within too short time, but also a software problem 0504 End of EPROM reached Unrecoverable SPU error General software error 0505 Software trap Unrecoverable SPU error General software error 0511 DZ divide by zero error An invalid value of DZ caused an internal divide by zero situation 0512 DZ floating point overflow error An invalid value of DZ has caused an internal overflow 0534 A1 range error 0544 A2 range error 0551 Position overflow An internal motor position overflow has occurred Check the dip height item DH or change the reference level (RL + AR) setting 0552 Position underflow Unrecoverable error An internal motor position underflow has occurred Recalibrate the gauge and change the reference level setting (RL + AR) 0553 Reference encoder error 1 A minimum correlation between the reference encoder table and the value, read from the actual reference encoder is not achieved Either the stepper motor or the reference encoder is defect or filthy Check motor and reference encoder (excessive oil?) 0554 Reference encoder error 2 A minimum correlation between the reference encoder table and the value, read from the actual reference encoder is achieved Either the stepper motor or the reference encoder is defect or filthy 0555 Reference encoder error 3 Motor slack of more than ¼ the revolution appeared Recalibrate the gauge 0556 Calibration impossible The combination of wire tension and displacer position makes it impossible for the SPU to move the motor and thus to check the reference encoder position Change the motor limit switch settings, or solve the wire tension problem 0557 The internal checksum over the exit data is incorrect Unrecoverable error 0601 Force transducer error 1 The frequency of the force transducer is too low 0602 Force transducer error 2 The frequency of the force transducer is too high 0603 On line EPROM error Replace the EPROM 0604 On line external RAM error Replace the RAM chip 0605 No wire tension A wire rupture was detected or the motor unit has not been unlocked or the force transducer is faulty 0606 Coupling synchronisation error, drum slip detected The internal position counters do not match the actual drum position Go into maintenance mode SM and recalibrate the gauge Check item WT, for a SPU (without alarm relays) WT should be set to ED or EDE 0607 Servo Auto Test failed for 3 consecutive attempts Unrecoverable SPU error 0608 Exit data scan time out exceeded Unrecoverable error The XPU refused to update the motor position in its NOVRAM 0609 Level calculation overflow The calculated level can not be displayed Please change the reference level setting or select another level format 0610 Wire tension too low The wire tension has been too low for a while Solve the problem or change the ML setting 0611 Wire tension too high The wire tension has been too high for a while Solve the problem, clean the displacer or change the ML setting 0650 Conversion error during level calculation Unrecoverable SPU error A conversion from internal units to an user specified dimension has gone wrong 0651 Divide by zero error during level calculation Unrecoverable error A floating point divide by zero error occurred during level calculations 0652 Floating point overflow during level Unrecoverable SPU error calculation 0700 Conversion error during set point calculation Unrecoverable SPU error The conversion of a measured frequency, calculated weight or measured density has gone wrong 0701 Divide by zero error during set point Unrecoverable SPU error A divide by zero situation occurred during the calculation of a set point, during a measure frequency command or during a density command 0702 Floating point overflow error during set point calculation A floating point overflow situation occurred during the calculation of a set point, during a measure frequency or during a density command 0751 On line internal RAM error 0809 Exit data updating error Unrecoverable SPU error The exit data item in the SPU has not been updated for more than 20 steps 0851 Relay 1 fail Relay 1 has not been mounted or fails to operate properly 0852 Relay 2 fail Relay 2 has not been mounted or fails to operate properly 0901 Divide by zero error in control routines Unrecoverable SPU error A divide by zero situation occurred in a control routine 0902 Floating point overflow error in control Unrecoverable SPU error A floating point overflow situation occurred in a control routine Item documentation Page 13

14 Level items (854) F0 (F1, F2, F3) Frequency constant 0 (1, 2, 3) N level 2 Hz standard floating point format E+00 F0 F3 are frequencies measured during calibration of the force transducer with the calibrated test weights F0 : frequency constant for displacer weight = 25 grams F1 : frequency constant for displacer weight = 100 grams F2 : frequency constant for displacer weight = 175 grams F3 : frequency constant for displacer weight = 250 grams Minimum value: E+04; maximum value: E+05 If during initialization an error message is set in ES the values for F0 F3 must be checked Measuring the frequencies F0 F3 must occur by the 854 itself after final assembly has taken place For this purpose there is the command MF which can be used to measure the frequencies The default value 0 in these items has as a consequence that immediately after initialization an error message is generated in the ES item FP Find reference encoder position C level 2 The special command FP does not break off any active operational command FP determines in which position the reference encoder is It is only active when previously the maintenance mode is selected by the command SM After the installation of a new motor block or new EPROMs, the reference encoder counter must be synchronized to the actual position of the reference encoder by means of this special command Refer to SM and UN After giving an FP command the gauge must be recalibrated FQ Frequency request D no write access Hz E-99 Some time (5 to 25 sec) after the command measure frequency MF, item FQ contains the measured frequency of the force transducer FR Freeze C not protected The Freeze command stops the motor of the 854 This situation is maintained until the user gives an unlock UN command Refer to HC and UN An 854 in freeze condition will not be able to change alarm status messages FS Fatal SPU errors N no write access 00 Item FS contains the number of fatal SPU errors counted, hangups of the SPU processor detected by the XPU via the inter processor communication Only fatal errors are counted, power downs are omitted from this item GD Go down C level 2 The GD command sends the displacer down when the 854 is in the maintenance mode The go down command can be broken off by a FR or a GU command Refer to FR, GU and SM The 854 in the maintenance mode cannot check wire tension or motor slip Page 14 Item documentation

15 Level items (854) GU Go up C level 2 This command sends the displacer up when the 854 is in the maintenance mode The go up command can be broken off by a FR or a GD command Refer to SM The 854 in the maintenance mode cannot check wire tension or motor slip HC Host command mode N level 1 12 ASCII characters; see below 123BCDFILTPU (from XPU A20 and up) This item can enable or disable the transmission of commands to the 854 SPU processor Commands which are disabled are filtered by the XPU processor If the host issues a command which is disabled by the host command mode HC, the host will receive an error message Position Commands Disabled Enabled interface 1 interface 2 interface 3 block calibrate dip mode freeze interface profile lock test test gauge tank profile unlock B C D F I L T P U The host command mode also affects the 811/813 compatible host communication If the host sends an 811/813 compatible command record to the 854, the XPU will convert it into 854 commands If the issued command is disabled, the host won t receive an error massage because this is not supported by the 811/813 compatible host communication protocols will be converted to: 811/813 compatible enabled/disabled water measurement host request record by HC position not active active N (block) 4 BL BL, I1 O (lock test) 9 LT LT, I1 Q (quit water) 1 - I1 T (test) 10 TG I1 U (unlock) 12 UN UN, I1 W (water meas) 3 I3 I3 Changes in this item will take effect immediately No exit command is needed in this case I1 (I2, I3) Interface 1 (2, 3) C not protected With interface command I1, I2 or I3 the operation mode can be changed Normally level mode I1 is active I3 is normally used for the product-water interface The displacer weight at the interface I1, I2, I3 is programmed in S1, S2, S3 The commands I1, I2 and I3, given from the host can be enabled / disabled with item HC Refer to HC L2 (L3) Level offset for interface 2 (3) N level 2 determined by item LD (m) The level offset items can be used to compensate for different submersion depths of the displacer at interface I2 and I3, compared to the submersion depth at interface I1 These offset levels will be subtracted from any calculated level if the current interface is either 2 or 3 The software checks neither for seize or sign of the level offset items LQ Innage servo level request D no write access determined by item This item contains the computed innage level with four status characters The displacement of the displacer with respect to the internal reference level is added to the value of this RL For a description of the 4 status bytes, refer to item QS Item documentation Page 15

16 Level items (854) LT Lock test C not protected After a lock test command LT the displacer is raised until the level specified in item MH is reached, or (for SPU version A20 and higher) the lock test limit level (item MZ) is reached The displacer is moved up at maximum speed If the displacer reaches the lock test limit level MZ, the command mode will change to block BL If MH has been reached the LT will remain active and the displacer stays at the MH position With command UN (unlock), the displacer can again be directed to another position in the tank Refer to HC and UN MF Measure frequency C not protected Item FQ holds the frequency measured by the force transducer, 5 to 25 seconds after issuing the command MF When the 854 shows FR (freeze) on the display the measurement is completed Item WQ requests for the force exerted on the measuring wire Once the frequency measurement has been performed, the gauge will continue with any operational command that is active Refer to FQ, WQ The 854 must be in freeze FR or block BL when the command MF is given MH Motor limit switch high level N level 2 determined by item LD (m) Item MH contains the highest position allowed to the displacer during normal operation Above the MH level the displacer can only be controlled by a CA and a GU command When MH is reached, a status bit is set in the level status Item MH must be defined below the physical upper part of the tank If this is not done, the measuring wire may break as the 854 cannot react quickly enough to a too high wire tension ML Motor limit switch low level N level 2 determined by item LD (m) Item ML contains the lowest position allowed to the displacer during normal operation Below the ML level the displacer can only be controlled with a GD command When the ML level is reached, a status bit is set in the level status, just like MH Item ML must be defined above the physical bottom of the tank If this is not done the measuring wire may run from the measuring drum MZ Lock test limit switch level N level 1 determined by item LD (m) Item MZ sets the highest displacer position allowed during the execution of a lock test command When the displacer reaches this level the lock test command will be canceled and a block command will be activated If the displacer is already on or above the MZ level when a lock test is send to the gauge, the lock test command will immediately change to a block Page 16 Item documentation

17 Level items (854) QS Servo status request D no write - Bytes 0, 1 and 2 contain information of the status of the alarm levels, the default operation mode and other general status data When 1 the status is active, when 0 the status is inactive Byte 3 is an ASCII character that indicates the active operational command The same four status bytes are used by data items: CQ, LQ, and UQ Status byte 0: Status byte 1: bit 0 : Low alarm bit 0 : Displacer movement down 1 : Low low alarm 1 : Displacer movement up 2 : High alarm 2 : On level 3 : High high alarm 3 : Test flag 4 : Motor limit switch low 4 : Calibration test successful 5 : Motor limit switch high 5 : Calibration test failed 6 : 1 6 : 1 7 : 0 7 : 0 Status byte 2: Active interface: bit 0 : Active interface bit 0 bit 1 bit 0 Mode 1 : Active interface bit I1 2 : Dipped level 0 1 I2 3 : I3 4 : General fail indication 1 1 Dip 5 : No previous ST, WD or SD command 6 : 1 7 : 0 Status byte 3: - : No command active N : Interface profile A : Balance test L : Lock test B : Block M : Measure frequency C : Calibrate R : Tank profile D : Go-down T : Test gauge F : Freeze U : Go-up RM Wire tension during AR command N level 2 gram force standard floating point format E+03 Item RM is the wire tension, not compensated for springing of the magnetic coupling Refer to AR S0 Last fatal SPU error D no write access 0000 : This item contains the error number of the last encountered error (item ES) before the last initialization In case of a fatal SPU error, also the address at which the error occurred is included Examples: 0000: No error encountered after start up 0809:5A3B Fatal SPU error 809 detected at address 5A3B S1 (S2, S3) Set point 1 (2, 3) N level 2 gram force standard floating point format E+03 S1 S3 are used to set a liquid interface level It contains the wire tension specific for interface I1, I2, I3 The content of a set point depends on the weight, the specific mass and the shape of the displacer and, of course, on the density of the products The set points must be entered in gf It is not necessary to define all three set points Minimum value: E+02; maximum value: E+03 Refer to I1, I2, I3 Item documentation Page 17

18 Level items (854) SM Set maintenance C level 2 SM starts the 854 SPU in maintenance mode During SM there is no control of the reference encoder position The user can restart the operational mode with commands SO or EX SO Set operational C level 2 The command SO is used to leave the maintenance mode This will cause the 854 SPU to restart in operational mode The XPU will remain in level 2 protection T1 (T2, T3) Integration time 1 (2, 3) N level 2 seconds standard floating point format E+01 T1, T2, T3 specifies an integration time for the accompanying set point items S1, S2, S3 Minimum value: E+00; maximum value: E+02 Refer to items LQ, I1, I2, I3 A too long integration time can have as consequence that not only wave fluctuations are filtered out, but also that level changes are followed too slowly TG Test gauge C not protected The TG command performs a reproducibility test The displacer is moved up 8 cm and returns to level During the execution of the test gauge command the reference encoder is also checked Refer to HC to prevent acceptation of selected operational commands TT Tank top N level 1 determined by item LD (m) When tank top reference stop for calibration is available this position should be programmed under item TT The tank top level is also used as the zero position for the measuring wire weight compensation Item TT is defined as a compensated innage CQ level, the location of this level depends on HF and HL UN Unlock C not protected The UN command is used to break off any active operational command After an UN command the 854 returns to the default operation mode The unlock command will always be accepted UQ Ullage servo level request D no write access determined by item Item UQ contains the computed ullage level The ullage level is calculated by subtracting the innage level from the Upper reference level UR For a description of the 4 status bytes, refer to item QS Page 18 Item documentation

19 Level items (854) WA Water measurement status N no write access - Item WA stores the water measurement status during power down W : Water measurement active - : Water measurement not active From XPU software version A20 (and later) the item also stores the command that was active before the water measurement: character in item WA water measurement last active mode D not active active active active active N/A interface 1 interface 2 interface 3 dip mode WQ Weight request (displacer) D no write access grams E-99 Upon completion of the MF command the value from WQ is processed and it contains the computed displacer weight, derived from the measured frequency FQ WT Wire tension protection N level 2 3 ASCII characters EEE First character E (enable) D (disable) Second character E (enable) D (disable) The wire tension of the measuring wire is checked in order to prevent wire rupture The motor will not move when the wire tension is below 20 gram or above 350 gram Wire tension is not checked Also the calibrate command CA does not operate and a CA command is internally converted to freeze FR Magnet slip detection will be active Magnet slip detection is not activated Third character E (enable) If this character together with the first character is set to E the wire rupture check is active When the wire tension drops below 20 gram for more than 30 seconds a wire rupture error will be generated A reset of the 854 resets this error When the wire has not been repaired the 854 will generate again a wire rupture error after 30 seconds D (disable) The wire rupture check is disabled For SPU boards (boards without alarm relay possibility) item WT should be set to EDE If not: Error ES=606 can be the result Y4 Last valid innage level at I1 D no write access determined by item The last valid innage level at interface 1 (item Y4) is a copy from the innage servo level item LQ The contents of the item Y4 is copied from the LQ item whenever the 854 operates in interface 1 or dip mode and has a valid LQ item Refer to item QS for the four bytes level status Item documentation Page 19

20 Level items (97x) 23 Specific 97x SmartRadar gauge items 24 Last valid ambient temperature N no write access determined by item TD ( C) The ambient temperature is used in the gauge reference correction (tank shell temperature correction) Since ambient temperatures are not yet measured, the ambient temperature can only be a manual value or the Antenna Unit temperature (item RT) is used as ambient temperature If no manual temperature value is available, the last valid value is used 25 Last valid vapour temperature N no write access determined by item TD ( C) The vapour temperature is used in the vapour influence correction and the gauge reference correction (tank shell temperature correction) The 97x SmartRadar uses one of the following vapour temperatures (in decreasing priority): Actual vapour temperature : If an actual vapour temperature is available (via one of the temperature boards) Manual vapour temperature : If no actual value is available Last valid vapour temperature : If none of the above vapour temperatures are available 26 Last valid product temperature N no write access determined by item TD ( C) The product temperature is used in the vapour influence correction and the gauge reference correction (tank shell temperature correction) The 97x SmartRadar uses one of the following product temperatures (in decreasing priority): Actual product temperature : If an actual product temperature is available (via one of the temperature boards) Manual product temperature : If no actual value is available Last valid product temperature : If none of the above product temperatures are available 4L Level conversion decision trace D no write access Each position in this item contains a flag from the level conversion process of the APU Their meaning is: Position Flag Mode / error Position Flag Mode / error 1 N Calculation mode normal 7 N Antenna Unit not operational C Commissioning mode 8 I RSP init busy R Verification pin mode 9 V RSP valid level 2 A Sweep mode automatic 10 R RSP reduced accuracy M Manual sweeps 11 W RSP warning code 3 I Initialisation error 12 O RSP out of measuring range 4 H APU hardware error 13 - Not used 5 N Antenna Unit non fatal error 14 - Not used 6 R Antenna Unit reduced accuracy 15 - Not used RSP means: Radar Signal Process Note for positions 3 till 12: a character means status active ; a dash means status not active Page 20 Item documentation

21 Level items (97x) 4M Automatic gain correction switch N level 2 1 ASCII character E To prevent the 07005/6/7 warning codes, an automatic gain correction can be applied at start-up E : Automatic gain correction enabled D : Automatic gain correction disabled When the automatic gain correction is enabled, and top and/or bottom clipping of the A-channel signal occurs, the value of item 5O (gain A-channel) is automatically adjusted This is only done at start-up or after an EX or RS command After initial commissioning of the SmartRadar, item 4M shall be set to D 4P Level calculation decision trace D no write access This item traces the decisions of the signal processing routines of the APU software The following flags are shown: Position Flag Contents Position Flag Contents 1 I Init status 6 R Reduced accuracy 2 F Peak found status 7 P Peak found before highest peak in bottom zone 3 A Peak accepted status 8 A Peak from normal level routine 4 B Peak in bottom zone P Peak from AdvancedDSP level routine (direct coupled) 5 O Peak in obstruction zone F Peak from AdvancedDSP level routine (filter coupled) Not used A character means status active ; a dash means status not active (except for position 8: A, P or F) 4S 2nd Level calculation decision switch N level 2 10 ASCII characters This item adjust the signal processing routines to a specific environment Position Selection Function 1 A Waveguide mode, with XPU broadcast frequency of 256 Hz B Waveguide mode, with XPU broadcast frequency of 200 Hz C Waveguide mode, with XPU broadcast frequency of 010 Hz - Waveguide / broadcast mode disabled 2 P Selection of the strongest peak reflection for level measurement - Intelligent peak detection 3 R Roof reflector installed This excludes a visible bottom reflection through the product - No roof reflector installed Bottom reflection may appear behind level reflection 4 C Correction on raw samples for variation in transmitted signal strength - No correction of raw samples signal 5 F AdvancedDSP level with phase-jump filter (as from earlier APU software versions) - AdvancedDSP level follows normal level (amplitude level) as close as possible (valid from APU software version A24) 6 S Always 6 point level calculation used - 4 point level calculation used in bottom zone 7 F Enable preference to first peak When this switch is set the radar prefers the first of two strong peaks instead of the last - Disables preference to first peak Not used 4U RSW (Waveguide) Radar innage D no write access cm A+9999 This data item has 6 bytes: one status byte (S), one sign byte (T) and four bytes level value in the dimension cm (independent from the setting of item LD) Status byte (S): Sign byte (T): (space) : no error (space) : positive level value A : level error (level fail, blocked, or general APU fail) + : positive level value B : supply voltage too low - : negative level value C : level error and supply voltage too low Item documentation Page 21

22 Level items (97x) 4V Level calculation decision switch N level 2 10 ASCII characters This item changes the signal processing algorithm to adapt specific environment conditions (double reflection detection) It also switches the reduced accuracy status if product peak enters bottom zone or obstruction zone Position Selection Function 1 B Reduced accuracy if peak in bottom zone - No reduced accuracy if peak in bottom zone 2 O Reduced accuracy if peak in obstruction zone - No reduced accuracy if peak in obstruction zone 3 D Double reflection detection switched on - Double reflection detection switched off 4 S Reduced accuracy if level peak detected above the maximum safe fill height (item SF) - No reduced accuracy if level peak detected above the value of SF 5 - Not used 6 - Not used 7 F Enables AdvancedDSP routines (valid from APU A12) P Enables restrictive AdvancedDSP routines (deviation in PSD ullage < 15 mm) - Disables AdvancedDSP routines 8 - Not used 9 X Reduced accuracy if gauge was reset before the relation between normal level and AdvancedDSP level is established (for W&M approved gauges; valid from APU A12) - Valid level condition in above mentioned situation 10 - Not used 4W Select first peak C not protected At start up, there might be a situation that there are two strong peaks at double distance, which could both be the level peak This can be caused by: a) second peak is a strong second order echo from the level or b) the first peak is a reflection from an obstruction and second peak is from the level In this situation, error code is generated The operator can now select with commands 4W and 4X which of the two peaks is the level peak: Command 4W selects the first peak as level peak Command 4X selects the second peak as level peak After issuing the 4W or 4X command, the error code 7014 changes into warning code 7014 The normal situation (no error or warning code) returns after a level change (no more double distances between the peaks) 4X Select second peak C not protected Refer to the description of item 4W 4Y Cancel select peak C not protected Refer to the description of item 4W Command 4Y cancels the earlier given peak selection with command 4W or 4X 4Z Corrected position of detected peaks D 25 no write access determined by item LD After issuing the FC command, this item contains the corrected position (distance from radar zero point) of the valid peaks in the reflection diagram This is similar to item 5D, and in addition, all ullage values are corrected for the enabled compensations Refer also to item 5D: position of detected peaks, and item CS: compensation switch Page 22 Item documentation