R7426A. MicroniK 200 TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK

Transcription

1 MicroniK 200 R7426A TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK PRODUCT DATA Fig. 1. Temperature controller FEATURES Microcontroller design based on modern digital technology User interface with LC display, four push buttons, and CPA/SPA-potentiometer Control ranges C or C Selectable proportional plus integral (P+I) or proportional-(p)-only control 3 inputs for temperature sensors Automatic sensor type identification of Balco 500, Pt 1000, or NTC 20kΩ 3 digital inputs for plant/system ON/OFF, occupancy (alternatively summer/winter changeover) and freeze protection Dehumidification control via humidity deviation input Selectable floating output functions: - Floating - 2- or 3-stage ON/OFF (TRIAC's) - Pulse-width modulation Pre-programmed control parameters Digital parameter setting Start-up routine Selectable direct/reverse acting output Space/supply limit or cascade control 24 Vac power supply Design in accordance with CE and DIN standards Order Numbers Fig. 2. LC Display GENERAL The R7426A temperature controller covers all space, air, or water flow temperature applications within the selectable control range of C or C with optional high or low limit control and outside air temperature compensation reset of the main setpoint. The controller can be configured to perform space-discharge air or supply water temperature cascade control. The R7426A controller is available either with or without realtime clock. Order-no. Controller description Temperature controller with one threeposition floating output and the choice of R7426A2006 selectable output signals to drive solidstate relays or step relays. Same as above but in addition with R7426A2014 integrated real-time clock (RTC) and Plant/System ON/OFF output. Order-no. Accessories Front panel mounting frame. U.S. Registered Trademark EN0B-0299GE51 R0602 Copyright 2002 Honeywell Inc. All rights reserved

2 TECHNICAL DATA General Temperature inputs Sensor type (selectable) CPA/SPA input (selectable) Digital inputs Outputs Electronic 8-bit microcontroller, 10-bit A/D converter, EEPROM, and LC display Power supply 24 Vac %, 50/60 Hz Power consumption 3 VA Control range C or C Main temperature sensor accuracy ±0.5 K T2 Limit or cascade temperature sensor (excluding T3 Compensation temperature sensor sensor) Automatic identification of sensor type Temperature range Characteristics Pt C 1000Ω at 0 C BALCO C 500Ω at 23.3 C NTC 20kΩ C / C (selectable) 20kΩ at 25 C CPA/SPA range CPATYP 0 CPA: ±5 K internal Sensor & CPA/SPA types CPATYP 1 ( Ω) CPA: ±5 K T7412B1016 (Pt 1000) CPATYP 2 ( kΩ) CPA: ±5 K T7412B1057 (Pt 1000) T7412C1030 (Pt 1000) T7412B1008 (NTC 20kΩ) T7412C1006 (NTC 20kΩ) CPATYP 3 ( kΩ) SPA: C T7412B1024 (BALCO 500) T7412B1040 (Pt 1000) CPATYP 4 (0...10kΩ) CPA: ±5 K CPATYP 5 ( kΩ) SPA: C CPATYP 6 ( kΩ) SPA: C or C Occupancy or summer/winter changeover input (selectable) Freeze protection input Plant/System ON/OFF input on controller without real-time clock ON/OFF output on controller with realtime clock TRIAC output Mode unoccupied or winter operation occupied or summer operation freeze protection operation normal operation OFF ON OFF ON Floating (selectable) 2 or 3-stage (selectable) ON (24 Vac) / OFF (0 Vac) Pulse width modulation (selectable) % based on run-time Potential-free contact open > 40kΩ closed < 100Ω open > 40kΩ closed < 100Ω open > 40kΩ closed < 100Ω max. load 450 ma at 24 Vac Operating temperature C ( F) Ambient limits Transport and storage temperature C ( F) Relative humidity % rh non-condensing Safety Protection class II in accordance with EN Protection standard IP30 or IP44 (with front panel) in accordance with EN60529 Dimensions (H x W x D) 105 x 152 x 37 mm Housing Weight 250 g Mounting Front door (with optional mounting frame ), back panel, wall, or rail Connections Connection terminal Friction spring screwless terminals max. 1 x 1.5 mm 2 EN0B-0299GE51 R0602 2

3 R7426B,C TEMPERATURE CONTROLLER CONTROL / CONFIGURATION PARAMETERS The controller includes two groups of settings (I and II) for control and configuration parameters that are automatically selected during programming. For parameter Ctrltyp = Lo, setting I is selected. For parameter Ctrltyp = Hi, setting II is selected. Control Parameter Setting I / Setting II No. Name Lo Hi Default P.01 W / / C P.02 Wlim 5 / / / 90 1 C P.03 Wcomp C P.04 Wi % P.05 Su % P.06 Wcas OFF, 0 50 / / OFF 0.5 C P.07 Rcas K P.08 Xp K P.09 Xp K P.12 tr1 1) OFF, 20 sec 20 min OFF 10/0.5 2) sec/min P.13 tr2 1) OFF, 20 sec 20 min OFF 10/0.5 2) sec/min P.15 Ystart K P.16 SOFFS K P.17 Cal K P.18 T2Cal K P.19 T3Cal K P.21 Runtime sec P.24 NightLow OFF, 8 19 / 80 OFF 1 K P.25 NightHigh OFF, OFF 1 K P.26 NOFFS / K Config. parameter No. Name Resolution Unit Remarks Values C.04 Ctrltyp Lo = C (factory preset), Hi1 = C, Hi2 = C Controller with RTC, only Default I / II C.05 CPATYP 0 = internal (default for Controller with RTC), 1 = ±5 K ( Ω), 2 = ±5 K ( kΩ), 3 = C ( kΩ), 4 = ±5 K (0...10kΩ), 0 5 = C ( kΩ), 6 = C or C ( kΩ) C.08 Mode 0= float., 1= 2 stage ON/OFF, 2= 3 stage ON/OFF, 3 = pwm, 4 = unconfig. 4 C.12 T2ext 0 = T2 installed; 1 = signal used for T2 0 C.13 LimTyp 0 = min.; 1 = max. 0 / 1 C.14 Senstyp 0 = Auto detection; 1 = NTC sensor type 0 C.15 CTRF Output used for: 0 = cooling; 1= heating; 2 = summer/winter changeover 0 / 1 C.16 AddHour Daylight sav. Inc. month (RTC, only): 0 (disable) = min.; 12 = max. 3 month C.17 SubHour Daylight sav. Inc. month (RTC, only): 0 (disable) = min.; 12 = max. 10 month C.18 PSTG_H 3) Prestart gradient for heating (RTC, only): 0 (disable) = min.; 10 = max. 0 K/min C.19 PSTG_C 3) Prestart for cooling (RTC, only): 0 (disable) = min.; 10 = max. 0 K/min C.21 Adapt Optimum start self-adaption speed (RTC, only): 0 = min.; 100 = max. 50 % C.22 Adr Serial communication address: 0 = min.; 255 = max ) C.23 DefProg 0 = No default programming; 1 = Initiates default programming 0 1) For tr > 2 min resolution = 0.5 min; for tr < 2 min resolution = 10 sec Notes 2) Actual value will not be changed during reset to default parameter 3) Can be overwritten by controller for self-adaption purposes, resolution = 0.01 K/min 2) Unit 3 EN0B-0299GE51 R0602

4 FUNCTIONS Real-Time Clock (RTC) The time clock performs automatic change of the controller mode to OFF, Night, Standby, or Comfort in accordance with the programmed time schedule. Schedules for one week and up to six switching points per day can be programmed in advance and repeated week after week. In addition, three different holiday schedule types (H1, H2, and H3) can be programmed. One of these holiday types can be assigned to each holiday date of the year (01.01 till 31.12). Holiday types H1 and H2 are valid only for this specific day and are reset to normal time schedule at midnight of that day. H3 is valid for every year and repeated year after year for fixed holiday dates. H1 can be programmed to be in the OFF mode the whole day and H2 to be in the ON mode for a short period of time on the last day of a longer holiday period to preheat or pre-cool the space in advance before the first occupied day. Optimum Start Program The optimum start program s objective is to minimize total energy consumption by calculating in room control applications the start time for heating and cooling mode which will bring its respective space temperature to the boundary of the comfort zone at the time of occupancy start. Night Cycle Program The night cycle program offers not only energy conservation, but also the ability to assign unoccupied night low or high limits for the protection of a space and its contents against temperature extremes. It automatically cycles between the user-selected upper and lower limits and turns on full heating or cooling with forced return air recirculation or full energy recovery whenever the limits are reached. APPLICATION The R7426A controller is suitable in particular for heating and cooling applications. NOTE: All diagrams show proportional control action, only. If P+I control is in operation, the slopes for heating and cooling are not defined. Main Temperature Control The R7426A controller compares the actual temperature value measured by the main sensor () with the calculated setpoint (CTRP1) and generates an internal deviation signal (X w). CTPR1 is the sum of the OAT compensation effect, the CPA, and the mode dependent offset. 100% 0 Heating 0 CTRP1 Y start Xp1 Cooling X w Fig. 3. Throttling range versus control output Depending on the deviation signal, the control output () value is calculated and converted to a floating signal. Cooling or heating action is selected by the configuration parameter CRTF. The throttling range setting (Xp1) controls the output span. The startpoint Y start determines the midrange shift (in Kelvin) of the output () from the calculated setpoint (CTRP1). Limit Control The R7426A controller offers limit control (W lim); this is performed by comparing the deviation signals of the main and limit control loops. The lowest (low limit control) or highest (high limit control) deviation signal is selected and fed into the output stage. High limit control is performed if control parameter LimTyp = 1 and low limit control is performed if control parameter LimTyp = 0. During limit control, the throttling range (Xp2) and reset time (tr2) are active. Limit control will be active only if the T2 temperature sensor (control parameter T2ext = 0) is connected or, alternatively, if the sensor (control parameter T2ext = 1) supplies the control loop. Cascade Control The R7426A controller provides cascade control; this is performed by two control loops, a master, and a submaster to maintain the master setpoint (CTRP1). Xp C CTRP1 MASTER 0 X Master w C CTRP2 R cas W lim SUBMASTER for LimTyp=1 W cas R cas W lim for LimTyp=0 Fig. 4. Cascade control 0 X Master w 4 EN0B-0299GE51 R0602

5 R7426B,C TEMPERATURE CONTROLLER At zero temperature deviation (X WMaster), the discharge temperature (T2) is controlled by the programmed setpoint (W cas = CTRP2). If the room temperature deviates, the submaster setpoint (CTRP2) is altered. The reset span adjustment (R cas) determines the extent of reset effect. The reset time and the throttling range of the P+I control for the submaster can be adjusted by the control parameters tr2 and Xp2. High limit of CTRP2 is performed if control parameter LimTyp = 1 and low limit of CTRP2 is performed if control parameter LimTyp = 0. CONTROLLER FUNCTIONS Outside Air Temperature Compensation Outside air temperature compensation is performed when T3 is connected. The control parameter W comp defines the compensation changeover point for summer and winter compensation. The extent of summer and winter compensation is defined by control parameters Wi and Su. W1 compensated C W1 Wi W comp Su Positive Negative Fig. 5. Summer / winter compensation Winter compensation is performed if temperature T3 < W comp. Summer compensation is performed if temperature T3 > W comp. Smoothing Filter for Outside Air Temperature Input A smoothing filter for the outside air temperature input T3 is incorporated to eliminate sudden temperature variations. This provides more stable operation of the control system. Summer/Winter Changeover Function The occupancy input can alternatively be used for summer/ winter changeover. The summer/winter changeover function is activated by setting the control parameter CTRF to 2. A potential-free contact can be used between terminals 1 and 4 to switch the controller mode to heating (contact open) or cooling (contact closed). Occupied/Unoccupied Function (SOFFS) A potential-free contact can be used between terminals 1 and 4 to switch the controller between comfort (contact closed) or standby (contact open) mode. T3 C parameter value is added (cooling) to or subtracted (heating) from the calculated control point for cooling and heating. Freeze Protection If the contact connected to the freeze protection input is open, the following actions will be executed: Control parameter CTRF 0 (cooling) 1 (heating) 2 (Cho) 2 (Cho) Output function Cooling Heating Cooling Heating Freeze protection action output 0% 100% 0% 100% In the case of controllers with RTC, the ON/OFF output will be switched off. A closed contact performs a frost recovery: Conditions of outdoor temp. T3 > 6 C or T3 not connected < 6 C Frost recovery Main temperature control Setpoint W1 is temporarily raised by Xp1 and linearly decreased to its normal value over approx. 10 min. Freeze protection operation has the highest priority over all other control operations. OUTPUT FUNCTIONS The R7426A controller provides a choice of output signals suitable for operating a range of final control devices according to the parameter setting of Mode control parameter. 3-Position Output for Valve or Damper Actuators (floating mode) Parameter setting for heating / cooling control outputs: Mode = 0. on off close out1 stop out2 open /Y2/Y3 The controller converts the deviation signal to a proportional output pulse which drives the actuators depending on the Runtime parameter value. An automatic synchronization function ensures correct positioning of the actuator. This is performed by periodically running the actuator to the closed position. The run-time for synchronization is derived by control parameter Runtime multiplied by In the comfort mode, the temperature set point W1 is used for the control point calculation. In standby mode the SOFFS 5 EN0B-0299GE51 R0602

6 Synchronization by the controller is initiated: after power up reset (initial start) after 250 control steps as soon as control output is below 5% if plant/system ON/OFF input is switched to OFF 2-Stage ON/OFF Sequence Control Parameter setting for output switching position: Mode = 1 on off Step1 on Step2 on Power out2 out % The R7426A controller converts the output signal into a twostage ON/OFF sequence output signal suitable for operating relays. Two relays can be connected to provide sequence control of e.g. two electric heater stages. 3-Stage Binary ON/OFF Sequence Control Parameter setting for output switching position: Mode = 2 on off Step1 on Step2 on Step3 on Power out2 out % The R7426A controller converts the heating signal into a three-stage binary ON/OFF sequence as shown in the diagram. Electric Heat Current Valve (pwm output) The diagram below shows as example, 60% output signal with motor Runtime set to 50 sec: Mode = 3. on off out1/out sec The pulse width modulated output is suitable for driving electric heat current valves and is controlled from the heating signal. The interval or total cycle time is set by the control parameter Runtime. ON/OFF Output (with RTC, only) The ON/OFF output is provided to switch fans, pumps, or other MicroniK 200 controllers not equipped with RTC. The controller will (after a fixed three-minute time delay) switch the ON/OFF output from OFF to ON whenever one of the following conditions occurs: The controller mode OFF (i.e. the controller is in the Comfort, Standby, or Night modes). The night cycle program is active. The controller will immediately switch the ON/OFF output from ON to OFF whenever one of the following conditions occurs: The controller mode = OFF. The freeze protection input is active. In the case of flow water temperature applications, if the configuration parameter Ctrltyp = Hi2, the controller will immediately switch the ON/OFF output from ON to OFF whenever the following condition occurs: The outside air temperature is above 8 C and the output signal = 0% for more than 5 minutes while the controller mode OFF (i.e. the controller is in the Comfort, Standby, or Night modes). ADJUSTMENTS Control Point / Setpoint Adjustment The control or setpoint can be adjusted via an internal or external potentiometer connected to the CPA/SPA input. The CPA/SPA type is selected by the control parameter CPATYP (see section "Technical Data"). Calibration of Temperature Sensors In case of an offset as a result of long wiring lengths, the temperature sensor inputs (, T2 and T3) can be adjusted separately by the control parameters CAL, T2CAL, and T3CAL. WIRING Wiring run From controller to all input and output devices Type of Length max. wires 1.0 mm mm 2 local standard (normally unshielded) 100 m 150 m Offset for temperature sensors due to wire resistance per 10 m of distance from sensor to controller: Type of wire 0.5 mm 2 (AWG20) 1.0 mm 2 (AWG17) 1.5 mm 2 (AWG15) Temperature offset Pt 1000 BALCO 500 NTC 0.18 C (0.324 F) 0.09 C (0.162 F) 0.06 C (0.108 F) 0.3 C (0.54 F) 0.15 C (0.27 F) 0.1 C (0.18 F) negligible EN0B-0299GE51 R0602 6

7 CONNECTIONS R7426A or Summer/Winter Changeover 24 V V 24V open/out 2 24V close/out 1 CPA/SPA T2 T = 0V * Occupancy T2 T3 Freeze prot. B A for Panel Bus Serial Interface W 303 Jumper 1) State Description W303 2) closed open T3 supplied by this controller T3 supplied from another controller 1) Default jumper position = closed 2) Cut (open) jumper W303 only if the T3 input is fed from another controller (parallel connection, max. 6 devices). This disconnects the T3 input from the internal power supply. * R7426A1008 ON/OFF On/Off Input 9 10 Plant / System R7426A1016 ON/OFF 24V On/Off Output 9 10 CAUTION Outputs are not isolated from power supply Observe correct phasing with 24 Vac power supply Fig. 6. Connections and jumper coding 7 EN0B-0299GE51 R0602

8 MOUNTING AND DIMENSIONS Honeywell All dimensions in mm. 105 SEL SET 121 +/- 0.3 = = 198 +/ /-0.3 = = 3.5 = = 87 +/-0.2 = approx. 45 x 35 (cut-out for cables) 4.5 (when mounting on DIN rail) = 110 +/ / /-0.2 wall mounting Fig. 7. Mounting and dimensions front panel mounting HONEYWELL Control Products Honeywell AG Böblinger Straße 17 D Schönaich Phone: (49) Fax: (49) Subject to change without notice. Printed in Germany Manufacturing location certified to EN0B-0299GE51 R0602