Optigo OP10 user manual
Chapter 10
Configuration
31
Menus X.4
P-band
Here you set the P-band (Proportional band). The P-band is the control offset necessary to
drive an output signal from 0 to 100%. In configurations involving two outputs the same P-
band applies to both outputs.
In controlmode 3, Cascade control this setting will set the P-band for the supply air
controller. The P-band for the room controller is set by the cascade factor, see menu X.6
below.
Menus X.5
I-time
Here you set the Integration time (Reset time). Menu X.5 is only shown if 3-point control has
not been selected in menu X.1.
Menus X.6
Damper minimum position (Control modes 1, 2 and 3)
Cascade factor (control mode 3)
0°C temperature boost (Control mode 4)
D-factor (control mode 5)
Damper minimum position
If you in menu X.2 have configured output AO2 to be a damper, alternative 6 or 7, you can
set a minimum value to the damper signal. The damper output will then not go lower than the
set value during normal operation. On shut-down however the signal will go to zero and fully
close the damper.
Cascade factor
For control mode 3 there is a second 3.6 menu page where you set the cascade factor, CF.
In cascade control an offset in room/extract air temperature will displace the supply air
controller’s setpoint so as to eliminate the offset. The cascade factor sets the amplification on
the corrective signal from the room controller. If for example you have set a cascade factor
of 5 and the room temperature falls 0.5 degrees below the room setpoint value the supply air
setpoint will be raised by 0.5 x 5 = 2.5 degrees.