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Room temperature controller | Command value output and command
value limit
Cyclical
This parameter determines the time interval for the cyclical transmission of the com-
mand values via all command value objects.
10.4.2 Command value limit parameters
Activation
The command value limit allows the restriction of calculated command values to the
range limits "minimum" and "maximum". The limits are permanently set in the ETS
and, if command value limitation is active, can be neither undershot or exceeded
during device operation.
The "Activation" parameter defines the type of action of the limiting function. The
command value limit can either be activated or deactivated using the 1-bit commu-
nication object "Command value limit - Activate / Deactivate" or be permanently act-
ive.
Active after reset
When controlling via the object, it is possible to have the controller activate the com-
mand value limit automatically after bus voltage return or an ETS programming oper-
ation. This parameter defines the initialisation behaviour here.
In the "Deactivated" setting, the command value limit is not automatically activated
after a device reset. A "1" telegram must first be received via the "Command value
limit - Activate/Deactivate" object for the limit to be activated.
In the "Activated" setting, the controller activates the command value limit automatic-
ally after a device reset. To deactivate the limit a "0" telegram must be received via
the "Command value limit - Activate / Deactivate" object. The limit can be switched
on or off at any time using the object.
This parameter is only visible if the command value limit can be activated via object.
Heating (also for basic level or additional level)
Minimum command value for heating
The "Minimum command value" parameter specifies the lower command value limit-
ing value for heating. With an active command value limit, the set minimum com-
mand value is not undershot by command values. If the controller calculates smaller
command values, it sets the configured minimum command value. The controller
transmits a 0% command value if no more heating or cooling energy has to be de-
manded.
Maximum command value
The "Maximum command value" parameter specifies the upper command value lim-
iting value for heating. With an active command value limit, the set maximum com-
mand value is not exceeded. If the controller calculates larger command values, it
sets the configured maximum command value.
Heating actuator 6-gang with controller | Order no. 2139 00 | 21393100
0...10...255 min
via object
permanently active
Checkbox (yes / no)
5%, 10%, 15%, 20%, 25%, 30%, 35%,
40%, 45%, 50%
55%, 60%, 65%, 70%, 75%, 80%, 85%,
90%, 95%, 100%
Page 169 of 257
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