Compact controller ER 2022S and ER 2022SA
10. Extra codes
10.2 Difference, humidity, or radio controller
For the controller to function as a ratio controller, further settings must
be made:
- controller process value: analog input 1
- external setpoint: ramp end value
Chapter 8.2 “Controller “Cntr””
If the ratio needs to be displayed, then one display must be
configured to “Math 1”.
Chapter 8.7 “Display “diSP””
Humidity control
A psychrometric humidity sensor is used to determine relative humidity,
through the mathematical combination of wet bulb and dry bulb
temperatures.
relative humidity: (E1, E2)
E1 – analog input 1
E2 – analog input 2
Fort he controller to function as a difference controller, settings have to be
made:
- controller process value math 1
Chapter 8.2. Controller “Cntr”
If the value for relative humidity needs to be displayed, the one display must
be configured to “Math 1”
Chapter 8.7. “Display “diSP”
Difference control
The difference between the measurements from analog input 1 and 2
is formed and made available via “Math 1”.
Difference: E1-E2
E1 – analog input 1
E2 – analog input 2
For the controller function as a difference controller, further settings
have to made:
- controller process value : math 1
Chapter 8.2. Controller “Cntr”
If difference is to be displayed, then one display must be configured to
“math 1”
Chapter 8.7. Display “diSP”
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