Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
100 ms / uint16Sets a timeout for communication with the external
controller.
If a communication break lasts longer than the timeout, the
action specified by parameter 60.59 DDCS controller comm
loss function is taken.
As a rule of thumb, this parameter should be set to at least
3 times the transmit interval of the controller.
Note:
• There is a 60-second boot-up delay immediately after
power-up. During the delay, the communication break
monitoring is disabled (but communication itself can
be active).
• With an AC 800M controller, the controller detects a
communication break immediately but re-establishing
the communication is done at 9-second idle intervals.
Also note that the sending interval of a data set is not
the same as the execution interval of the application
task. On ModuleBus, the sending interval is defined
by controller parameter Scan Cycle Time (by default,
100 ms).
DDCS controller
comm loss time
60.58
- / -Timeout for communication with external controller.0...60000 ms
Fault / uint16Selects how the drive reacts to a communication break
between the drive and the external controller.
DDCS controller
comm loss function
60.59
0No action taken (monitoring disabled).No action
1
Drive trips on 7581 DDCS controller comm loss. This only
occurs if control is expected from the external controller,
or if supervision is forced using parameter 60.65 DDCS
controller comm supervision force.
Fault
2
Drive generates an A7CA DDCS controller comm loss
warning and freezes the speed to the level the drive was
operating at. This only occurs if control is expected from
the external controller, or if supervision is forced using
parameter 60.65 DDCS controller comm supervision force.
The speed is determined on the basis of actual speed using
850 ms low-pass filtering.
WARNING!
Make sure that it is safe to continue operation in
case of a communication break.
Last speed
Parameters 453
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