Universal microprocessor-based ON/OFF and P programmable controller MS8122A MS8122B

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1 COMPETENCE IN MEASUREMENT Universal microprocessor-based ON/OFF and P programmable conroller MS8122A MS8122B TECHNICAL DESCRIPTION AND INSTRUCTION FOR USE PLOVDIV

2 I. TECHNICAL DATA Analog inpus 1 Linear curren Linear volage 0 (4) ma DC 0 1 (10) V DC RTD sensor Thermocouple P 100 ype J, K, S, B Relay oupus 3 K1 ON / OFF or Relay 250 V / 5 A or OC for TTL К2 ON / OFF or (or Alarm for MS8122B) К3 Alarm only for MS8122A Opions Relay 250 V / 5 A or OC for TTL Relay 250 V / 5 A or OC for TTL Triac 250 V / 2 A; Relay 250 V / 5,10 A or OC for TTL Analog oupus 2 Transmiing curren Transmiing volage 0 (4) ma DC 0 1 (10) V DC Indicaion and keypad Display Range Accuracy 1x4 digis LED ± 1 LSB Forma of he display Keypad X.XXX XX.XX XXX.X XXXX folio Power supply Power supply volage Operaing condiions Operaing emperaure Operaing relaive humidiy Dimensions Overall dimensions (WxHxL) Insallaion Weigh Sorage Sorage emperaure Sorage relaive humidiy II. DESIGNATION V AC 24 V AC/DC 12 V AC/DC 0 50 C 0 80 % RH 48 x 48 x 97 mm panel in a hole 44 x 44 mm max 200 g C 0 95 % RH The compac microprocessor-based ON/OFF and P conrollers of MICROSYST, of he series MS8122, are designed for measuremen and conrol of various process parameers. Two main modificaions of MS8122 are manufacured: MS8122A wih hree digial oupus and MS8122B - wih wo digial and one analog oupu. The conroller may realize ON/OFF or proporional algorihm of conrol (program selecable). The oupus are, respecively, conrolled by logic ON/OFF or by pulse widh modulaion (). III. FRONT AND BACK PANEL ANALOG OUT RS485 IO+ ANALOG OUT RS485 IO+ IO- IO- K1 K2 K3 K1 K2 2

3 Tuning of parameers Ediing of he se-poin for conrol (heaing) Tuning of sysem parameers Confirmaion of correcion Exi from mode TUNING Change of parameers Tuning of he analog inpu Change of parameers IV. CONNECTING OF TEMPERATURE SENSORS AND TRANSMITTERS To obain he bes resuls, he sensors mus be locaed in appropriae places wihin he media where he emperaure adjusmen is o be achieved. If hey are insalled ino a hole use a hea-conducing sealing. 1. Connecing of resisive sensors (P100 or oher) The sensors can be conneced by wo-wire or hree-wire line. The connecing of wo-wire sensors o hree-wire line can be done by he scheme, shown on fig. 1. Beween wo of he erminals of he conroller you have o pu a cable jumper obligingly, as i is shown on he figure. If he disances beween he sensor and he conroller are larger, i is recommended o use a hree-wire line, because he error from he emperaure measuremen, due o he addiional resisance, enered by he connecing wires, is compensaed his way. The connecing of hree-wire sensors o he conroller can be done according o he scheme, shown on fig. 2. JUMPER Cables, conneced shorly in he sensor Fig. 1 Fig Connecing of hermocouples When connecing a sensor hermocouple, you have o pay aenion o he polariy of he sensor. If he polariy is invered, he indicaions of he device will be incorrec. When operaing wih hermocouples, i is necessary o use a compensaion cable, corresponding o he ype of he used hermocouple (fig. 3). Thermocouple Compensaion cable Fig. 3 3

4 3. Connecing of ransmiers 1) Two-wire connecion ransmiers The ransmier is power supplied by he device. I - + Fig. 4 * The volage, provided by he device, is no sable. 2) Self-supplying ransmier U power I - + Fig. 5 3) Three-wire ransmier, supplied by he device I - Ou + Fig. 6 * The volage, provided by he device, is no sable. V. CONNECTING OF THE OUTPUTS OF THE CONTROLLER When he oupus are equipped wih relays, RC unis are conneced in parallel o he conacs of he relays for beer noise immuniy. In an AC circui, hrough he open conac of he relay flows minimum curren. If he oupu of he conroller is of he ype SSR, i mus be conneced as i is shown on fig. 7. LOAD K1 K2 K3 4 Fig. 7 Phase Zero ~220V

5 VI. OPERATION PRINCIPLE Logically, he conrollers of he series MS8122 are designed wih one (join) analog inpu and 2 independen channels for conrol, each of hem wih is se-poin and own parameers, deermining is operaing mode, and each of he channels can operae by logic heaing or cooling. This eernal organizaion gives a possibiliy for realizaion of ON/OFF 2 saes or 3 saes, proporional, and sep conrol. Simple block-scheme of a conroller is shown on figure 8. 2 saes conrol 1 Proporional conrol 1 SP1 Analog inpu PV 1/Pb1 Pb1 K1 SP2 1/Pb2 Proporional conrol 2 Pb2 2 saes conrol 2 Fig. 8 Basic parameers, used in he device: SP -se-poin for conrol Pb -proporional band or hyseresis (changing he sign of he parameer s value changes he operaion mode: heaing or cooling) PV -inpu parameer 1 and 2 -period of = i+p (a 0 ON/OFF algorihm of conrol) i -ime for impulse a conrol p -ime for pause a conrol PV SP + Pb SP SP - Pb Oupu Fig. 9 Figure 9 shows he operaion principle of conroller 2 saes wih oupu logic heaing (1=0, Pb1>0 for channel 1 and 2=0, Pb2<0 for channel 2). 5

6 PV SP + Pb SP SP - Pb Oupu Fig. 10 Figure 10 shows he operaion principle of 2 saes conroller wih oupu logic cooling (1=0, Pb1<0 for channel 1 and 2=0, Pb2>0 for channel 2). SP PV SP - Pb/2 SP - Pb Zone of 0% oupu 100% oupu 0% oupu 50% oupu 100% oupu PV SP + Pb SP + Pb /2 SP Zone of Fig % oupu 0% oupu 100% oupu 50% oupu 0% oupu Oupu 100% Oupu 50% Fig. 12 Period of i p Oupu 0% Fig. 13 Figure 11 shows he principle operaion of a conroller wih oupu wih logic heaing (1>0, Pb1>0 for channel 1 and 2>0, Pb2<0 for channel 2), and Figure 12 operaion of a conroller wih oupu wih logic cooling (1>0, Pb1<0 for channel 1 and 2>0, Pb2>0 for channel 2). Figure 13 shows he principle operaion of oupu. A 50% oupu i=p. 6

7 VII. OPERATION MODE Afer power supplying he conroller eners normal operaion mode. The value of he inpu parameer appears on he display. The LEDs К1 and К2 indicae if he respecive oupu К1 or К2. When he value of he process parameer decreases under he lower limi or exceeds he higher limi of he alarm, he ime delay of he alarm oupu sars running ou, afer ha he oupu acivaes. The availabiliy of alarm condiions before he acivaion of he alarm oupu is indicaed by a flashing LED AL, and he acivaed oupu by li LED AL. VIII. LEVELS OF PROGRAMMING 1. Displaying and ediing of he se-poins for conrol (SP1 and SP2) Displays se-poin 1 SP1 for 5 sec., afer which i reurns o displaying of he inpu parameer. Displays se-poin 2 SP2 for 5 sec., afer which i reurns o displaying of he inpu parameer. By pressing of he buon value of he se-poin (SP1 or SP2), which has been displayed before he pressing of he buon, sars flashing and is ediing is permied. If you do no press a buon in 5 sec., he conroller reurns o normal operaion. Ediing of he se-poin Exi from change of he se-poin SP1 or SP2. You can exi he mode auomaically, oo, 5 seconds afer he las pressed buon, and he change is memorized. 2. Level sysem parameers If he inpu parameer is displayed, press and hold o ener mode TUNING OF PARAMETERS. un appears on he display ill releasing of he buon. You can browse he parameers for uning by hese buons Press o edi he parameer You can change he value of he seleced parameer You can confirm he change When End appears on he display, while you are looking a he parameers, press his buon and he device will exi mode TUNING OF PARAMETERS Parameers Descripion Values Facory value 1 Period of for SP sec. A "0" ON/OFF algorihm of conrol. Pb1 Proporional band a proporional algorihm or hyseresis a ON/OFF algorihm for SP1. The hyseresis is smaller han he measured parameer wih one order (decimal poin according o he parameer) 2 Period of for SP sec. A "0" ON/OFF algorihm of conrol. Proporional band a proporional algorihm or Pb2 hyseresis a ON/OFF algorihm for SP2. The hyseresis (decimal poin according o he is smaller han he measured parameer wih one order. parameer) Alo Lower limi o he absolue alarm (decimal poin according o he parameer) Ahi Higher limi of he absolue alarm (decimal poin according o he parameer) Ald Delay of acivaion of he alarm sec. 7

8 3.Level hidden sysem parameers A power supplying of he device, a unlocked keypad, press and hold he buon. The hidden parameers appear a he beginning of he menu wih he basic parameers. The access o hem is possible ill swiching off of he device from he power supply.! Change hem wih grea aenion, because heir change may cause incorrec operaion of he device! Parameer Descripion Values FLJ FL FiL Maximum change of he inpu parameer in wo consecuive values, over which he filer of he inpu parameer is pre-iniialized. Time, afer which he filer of he inpu parameer will be pre-iniialized a signal jump over FLJ. Coefficien of filering of he inpu parameer. The smaller is he value, he deeper is he filer (decimal poin according o he parameer) sec AP1 Muliplying coefficien for he analog oupu * AP0 Offse of he analog oupu * Hid Lod DP Maximum value of he displayed parameer. The value mus correspond o he inpu linearizaion. Minimum value of he displayed parameer. The value mus correspond o he inpu linearizaion. Tuning of he decimal poin. *The calculaion of he analog oupu can be done by he following formula: AP1*( PV Lod) Aou = + AP0, PV is he value of he measured. ( Hid Lod) *1023 IX. LOCKING/UNLOCKING THE KEYPAD (dec. poin according o parameer) (dec. poin according o parameer) X.XXX 3 - XX.XX 2 - XXX.X 1 - XXXX. 0 XXXX Facory value Locking/unlocking he keypad can be done when he device is normally sared, by pressing and holding of he righ of he buons, and afer ha by pressing of he lef one. The locking of he keypad is wih he aim o avoid uninenional or unauhorized inervenions in he uning and he operaion of he device. X. USER SETTINGS OF ANALOG INPUT OFFSET In his mode he users can freely ener a programmable coefficien, which will be added every ime a he measuring of he channels ( offse ). This mode is used in case he displayed value differs from he value, measured by anoher reference device. 8 When power supplying he device, a unlocked keypad, hold he buon. If h inpu parameer is on he display, press and hold he righ buon, press he lef one and OFS appears on he display ill releasing of he buon. The value, which is being uned, is more accurae han he measured parameer wih one order. Change of he value of he offse. Confirm he change and he new value is added o he old value of he offse.

9 EXAMPLES FOR USER TUNING OF THE OFFSET 1. Indicaion on he display: Enered coefficien: New indicaion on he display: Enered coefficien: New indicaion on he display: Enered coefficien: New indicaion on he display: 132 XI. NOISE IMMUNITY MEASURES 1. Recommendaions for using of connecing wires - Wires, which carry signals, close by ype, can be packed ogeher, bu if he signals are differen, he wires mus be separaed for proecion from capaciive and inducive ineracion. - When you have o cross signals wih signals, differen by ype, his mus be done a righ angle and a maximum disance. - Wires, which carry weak signals, and wires, connecing he sensors wih he conroller, mus no pass near conacors, moors, generaors, radio ransmiers and wires, which carry big currens. 2. Noise immuniy by using of he filer, buil-in he conroller - If he inpu parameer hesiaes and is no sable, i is necessary o decrease he coefficien of he filer F. The smaller is he coefficien value, he heavier is he filer and he inpu parameer changes slowly. - If he inpu parameer jumps periodically for shor ime inervals, i is necessary o increase he parameer FL. If his parameer is increased, he device responds slower a sudden change of he inpu parameer, bu i ignores he shor-erm noise. Bulgaria, 4000 Plovdiv, 4 Murgash sr. Tel.: ( ) , Fax: ( )

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