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Room temperature controller | Command value output and command
value limit
the room temperature from the setpoint temperature or the controller requires a long
time to adjust to the setpoint with the heating or cooling energy that is being applied.
The controller evaluates this state in a particular manner.
The controller maintains the maximum command value only as long as it is neces-
sary. After that it adjusts the command value downwards according to the PI al-
gorithm. The advantage of this control characteristic is the fact that the room temper-
ature does not exceed the setpoint temperature at all, or only slightly. It should be
mentioned that this necessary control principle increases the tendency to oscillate
about the setpoint.
Clipping may also occur when a command value limit is active (maximum
command value). In this case, if the internally calculated command value
reaches 100%, then the controller only transmits to the bus the maximum
command value according to the ETS configuration.
10.4.1 Command value output parameters
Command value output
PWM cycle time
This parameter specifies the cycle time for the pulse width modulated command
value (PWM).
Polarity of the command values
Heating
At this point, it is possible to specify whether the command value telegram for heat-
ing is output normally or in inverted form.
This parameter is only visible if the operating mode "Heating" or "Heating and cool-
ing" is configured and not two-level operation.
Basic level heating
At this point, it is possible to specify whether the command value telegram for the
basic level heating is output normally or in inverted form.
This parameter is only visible if the operating mode "Heating" or "Heating and cool-
ing" is configured along with two-level operation.
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
1 ... 15 ... 255 min
normal (under current, this means
opened)
inverted (under current, this means
closed)
normal (under current, this means
opened)
inverted (under current, this means
closed)
Page 167 of 257
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