ABB i-bus KNX Product Manual page 109

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ABB i-bus KNX
Parameters
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Dependent parameter
Send control value cyclically (0 = cyclical sending disabled)
This parameter is only visible on the selection of the PI continuous (0...100%) option.
Options:
This parameter is used to specify the cycle time with which the control value is to be sent.
On the selection of the value 0, cyclic sending is deactivated.
If the control value is only output via a group object, this value should not be set to 0 because otherwise
it will not be ensured that the actuator receives its control value.
In particular, in combination with the Control value difference for sending control value parameter and
the Only send cyclically option that can be selected there, the value 0 is not allowed to be selected.
This configuration would mean that the control value is never output.
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Dependent parameter
Cooling PWM cycle
This parameter is only visible on the selection of the PI PWM (On/Off) option.
Options:
Using the value set here, the cycle time for the control value for the PWM signal calculated from the PI
controller's control value is specified. Depending on the control value, the selected cycle time is divided
into an On and Off signal.
Therefore, a control value output of 33 % with a PWM cycle of 15 min signifies an On phase of five
minutes and an Off phase of 10 min.
The value is only sent if the control value changes (from 0 to 1 or vice versa).
At the start of a cycle a 1 is output and, corresponding to the control value, a 0 after the time x.
If the control value is 0 %, on reaching this control value a 0 is output once. The next value is only sent
if the control value changes.
0...15...60 min
Note
0...15...60 min
Note
VC/S 4.x.1 | 2CDC508220D0211 Rev. A 107