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HONEYWELL
R7426A,B,C
TEMPERATURE CONTROLLER
MicroniK 200
WITH AND WITHOUT REAL-TIME CLOCK
INSTALLATION & START-UP INSTRUCTIONS
GENERAL
This document provides instructions and procedures for
installing and starting up the Micronik 200 R7426A,B,C
controllers. No special tools are required for mounting and
installation. The user interface and liquid-crystal display allow
accurate and easy parameter setting and output adjustment.
BEFORE INSTALLATION NOTE
• Visually inspect equipme
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK WIRING Screwless type, spring loaded terminals are provided on the controllers for panel and field wiring. These terminals are suitable for solid conductors as well as tinned or with 2 multicore cable end, stranded wires up to 1.5 mm . To make a termination, push the wire into the terminal or insert a small screwdriver from the front of the controller into the spring-release hole and insert the wire. Check for proper W30
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK CONFIGURATION AND CONTROL PARAMETERS *) The controllers R7426A,B,C include 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, and for parameter Ctrltyp = Hi1/Hi2, setting II is selected. config. par. R7426 default actual description setting value no. name A B C C.01 DIR/REVY1 Selects the output a
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK config. par. default R7426 actual description setting value no. name A B C I / II 0 x x x C.12 T2ext Enable / Disables the T1 sensor input to be used for both T1 and T2 inputs. 0 T2 installed 1 T1 signal used for T2 x x x C.13 LimTyp Limitation type determines whether the limit function is low or high. 0 / 1 0 Low limit 1 High limit 0 x x x C.14 Senstyp Sensor type determines automatic detection or
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK control par. setting I / setting II R7426 reso- actual description unit lution value no. name low high def. A B C 50 / 21 / P.01 W1 Main setpoint for input T1 0 0.5 °C x x x 130 70 5 / 50 / 16 / P.02 Wlim Limit setpoint (low or high) for input T2 1 °C x x x 30 130 90 P.03 Wcomp Compensation changeover point for input T3 -5 40 20 1 °C x x x P.04 Wi Winter compensation authority -350 +3500 2 % x xx P.05 Su Summer c
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK CONFIGURATION SETTINGS The controllers R7426A,B are supplied with unconfigured Table 6. Selection of CPA/SPA Type outputs to avoid damage of installed final control devices by CPA / SPA sensor / CPATYP supply of not applicable output signals if the controller power range remote setpoint unit type supply is turned on. CPATYP 0 internal CPA: ±5 K All configuration parameters must be set to select the correct CPATYP 1
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL TIME CLOCK Output Signal Mode YMode (C.11) Supply of Temperature Signal T2 Sequence Operation T2ext (C.12) The controllers R7426B,C are supplied from the factory If sensor T1 is used also for high or low limit control, the con- configured for sequence operation of heating, mixed air, and figuration parameter T2ext must be set to 1. This inter- cooling control. connects the T1 and T2 input internally and the sensor has to The seque
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL TIME CLOCK Summer / Winter Time Change Default Programming DefProg (C.23) Setting the control parameter DefProg to 1 resets all control AddHour / SubHour (C.16 / C.17) and configuration parameters to defaults (see Table 4 and These configuration parameters are only available on Table 5). Default programming is indicated by a display of def. controllers with RTC. The configuration parameter AddHour After default programming, the pa
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL TIME CLOCK limit or cascade sensor (T2) to operate the output device from Setting Guidelines for Proportional Band of P and full open (100%) to full closed (0%) or vice versa. P+I Control Xp1 is the throttling range for the main control loop, Xp2 is To estimate the proportional band (throttling range X ) for p used if limitation or cascade control (submaster control loop) stable control under all different load conditions, the con
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL TIME CLOCK Table 12. Calculation of summer/winter compensation Setting Guidelines for Reset Time of P+I Control outdoor air The reset time tr should be adjusted to 2...3 times of the control room temp. throttling temp. response time T , which is the time interval between the u schedule (T1) range (X ) P (T3/T ) beginning of a sustained disturbance (e.g. rapid step change comp of valve position) and the instant when the resulting
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL TIME CLOCK If the controller is in OFF mode, the time schedule program Y (%) overrides the minimum position by the ON/OFF input for plant/system shut off and the damper is driven into the fully 100 closed position at OFF condition together with the heating and UNOCCUPIED cooling valve actuators. OCCUPIED Runtimex, x = Y1, Y2, or Y3 (P.21...P.23) The control parameters Runtimex (x = Y1 for R7426A; x = Y1, Y2 or Y3 for R7426B) ar
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL TIME CLOCK Changing Operating Modes Fig. 7 shows the six operating modes. After power-up the Pushing the SET and SEL button simultaneously for approx. controller version is displayed and the controller enters the 1 sec causes the controller to leave the standard display standard display mode. In this mode, selected input or output mode and to enter the output data selection mode (Fig. 11). values and on controllers with real-time clo
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK Time Out After approximately 10 min of inactivity (no button has been by the SET button are ignored by the controller and old pressed: time out), each mode returns automatically to parameter values will be retained. standard display mode. Inputs that have not been confirmed A B A °C TIME & SUBMASTER / LIMIT SETPOINT WEEKDAY CTRP2 We ON CONTROLLERS WITH REAL-TIME CLOCK, ONLY Date °C COMPENSATION DATE TEMPERATURE T3 We °C %
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK Displaying Actual Values °C In the standard display mode, one of nine actual values, the actual time, or the date can be selected and displayed by pushing the SEL button. The icons of the permanently displayed controller mode are °C described in the following table: Table 13. Icons controller mode / status display Off OFF - icon FIRST DISPLAYED CONFIGURATION 1) PARAMETER: ACTUAL Night Moon - icon FOR R7426C PARAMETER V
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK • To release the manual override (fixed) of the output, select the output, enter output adjustment mode and push the + and - button simultaneously. Pushing the SEL button leads back to standard display mode. WITH : MANUAL OVERRIDE IS ACTIVE % % R7426B WITHOUT : AND R7426C, CONTROL LOOP ONLY IS ACTIVE % Fig. 11. Output Selection Mode % % OUTPUT OUTPUT SELECTION SELECTION % % TO ADJUST OUTPUT O
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK Using the Schedules (with RTC, only) a normal day (day type = H0 is default). The function is Two schedules, one for programming the schedule points and described as follows: one for holiday programming, are available. • H0: no holiday - the weekday schedule applies The standard schedule is used to switch the controller mode (off, night, standby or comfort) at programmed schedule • H1: free programmable as for a weekday,
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK Selecting Clock and Schedules (with RTC, only) Programming Standard Schedule (with RTC, only) The standard schedule programming is used to program up to DATE & TIME DATE & TIME 6 schedule points for each weekday as well as for three SELECTION ADJUSTMENT holiday types. The controller mode (off, night, standby or comfort) will be switched at these programmed schedule points. The first step of the schedule programming (see Fi
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK Programming Holiday Schedule (with RTC, only) Interpreting Error Messages The holiday schedule programming is used to program each Different analog input errors can be identified by the controller day of the year (01.01 ... 31.12.) as a holiday (day type = H1, (Error handling). The defective analog input (T1, T2, T3 or H2 or H3) or as a normal day (day type = H0 is default). X ) will be displayed in the standard display m
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK NOTES (WITH RTC, ONLY) ) day Jan. Feb. March April May June July August Sept. Oct. Nov. Dec. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21.
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R7426A,B,C TEMPERATURE CONTROLLER WITH AND WITHOUT REAL-TIME CLOCK point 1 point 2 point 3 point 4 point 5 point 6 1) day 2) 2) 2) 2) 2) 2) time SMode time SMode time SMode time SMode time SMode time SMode Mo Tu We Th Fr Sa Su H1 H2 H3 1) 2) Weekday or holiday type; Programmed controller mode (schedule mode) Table 17. Weekly schedule and holiday types
