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R7426A,B,C,D TEMPERATURE AND UNIVERSAL INPUT CONTROLLERS
APPENDIX
Control And Configuration Parameters
The controller includes two groups of settings (I and II) for
control and configuration parameters. These settings are
automatically selected during programming. See Tables 9 and
10.
R7426
Parameter
A B C D
#
Name
x x x x P.01 W1
x x x x P.02 W
lim
x x x x P.03 W
comp
x x x x P.04 Wi
x x x x P.05 Su
x x x x P.06 W
cas
x x x x P.07 R
cas
x x x x P.08 Xp1
x x x x P.09 Xp2
x x
P.10 Xpc
x x
P.11 Xph
x x x x P.12 tr1
c
x x x x P.13 tr2
c
x x
P.14 MINPOS
x x x x P.15 O
start
x x x
P.16 SOFFS
x x x x P.17 I01Cal
x x x x P.18 I02Cal
x x x x P.19 I03Cal
x x
P.20 RetOffs
x x
P.21 RuntimeO1 Actuator run time (O1)
x
P.22 RuntimeO3 Actuator run time (O3)
x
P.23 RuntimeO2 Actuator run time (O2)
x P.27 td
x P.28 vd
a
Values in brackets are for R7426D models only.
b
Unless otherwise noted.
c
If tr is greater than 120 sec, resolution is 30 sec; if tr is less than 120 sec, resolution is 10 sec.
63-2565
Table 9. Control Parameters.
a
Description
I01 main setpoint
I02 limit setpoint (low or high)
I03 compensation changeover point 20
Winter reset
Summer reset
Submaster or cascade setpoint
Cascade reset span adjustment
I01 Throttling range (main control
loop)
I02 Throttling range (cascade or limit
control loop)
Cooling throttling range (sequence
control)
Heating throttling range (sequence
control)
Reset time (main control loop)
Reset time (cascade control loop)
Minimum position (damper
actuators)
Mid-range shift start point (O1)
Main setpoint offset (standby mode) 0
Calibration of sensor I01
Calibration of sensor I02
Calibration of temperature sensor
I03
Return air offset to simulate exhaust
air conditioning
Derivative decay time (P+I+D
control)
Derivative amplification (P+I+D
control)
NOTES:
—
For more details on parameters see the
Parameter Programming section.
—
Parameter Ctrltyp determines the setting:
Ctrltyp Lo selects setting I.
Ctrltyp Hi1 and Hi2 select setting II.
Setting I / Setting II
a
Low
High
32 [0]
130/260 [100] 70/160 [50] 1 [0.5]
40 [0]
130/260 [100] 60/200 [90] 1
110
-350
+350
-100 [-350] +100 [+350]
Off, 50
260 [100]
[Off, 0]
0
70 [50]
1
70 [50]
1
70 [50]
Off, 1
70
1
70
Off, 20
20 minutes
0
50
-40 [-50]
+40 [+50]
20
-40 [-20]
+40 [+20]
Off, 0
10
6
180
1
60
0
5
10
a
a
Default
Resolution
70
1
0
2
0
1 [2]
70 [Off]
1 [0.5]
20 [10]
4 [10]
20 [10]
6
1
12
Off
10 (0.5 min) sec
20
1
0
1 [0.5]
4 / 10
0.1
0
0.1
Off
0.1
60
1
1
0
0.1
a
a,b
Unit
°F [%]
°F
%
°F [%]
°F
%
°F [%]
°F
°F [%]
°F
sec
—
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