Technical Manual
–
Central Operation Unit Smart
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Phone: +49-2263-
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4.8.3 Controller Settings
The output of the control value is defined with the setting of the control value. Depending on this
setting, the other setting options are displayed.
The following table shows the setting options for this parameter:
ETS-Text
Dynamic range
[Default value]
Comment
Control value
▪
PI control continuous
▪
PI control switching (PWM)
▪
2-step control (switching)
The control value determines the
control mode used
Table 55: Settings - Control value
The controller has three different controller types which control the control value. The further
parameterisation possibilities depend on the type of controller used. The following controllers can be
selected:
•
PI control continuous
•
PI control switching (PWM)
•
2-step control (switching)
The following chart shows the relevant communication objects:
Number
Name
Length
Usage
153
Control value heating
1 Byte/
1 Bit
Controlling the actuator for the heating process
153
Control value heating/cooling
1 Byte/
1 Bit
Controlling the actuator for the heating and
cooling process
155
Control value cooling
1 Byte/
1 Bit
Controlling the actuator for the cooling process
Table 56: Communication objects - Control value
Depending on the controller mode set, the control value controls the heating and/or cooling process.
If the control value is selected as continuous PI control, the communication object for the control
value is a 1-byte object, as the control value can assume several states. If the actuating variable is
selected as a 2-point control or as PWM control, the communication object is a 1-bit object, as the
actuating variable can only assume 2 states (0; 1).
