Diagnostics and Troubleshooting
NHA80945 04/2017 79
The drive reacts according to the communication interruption configuration (operating state Fault,
maintenance, fallback, and so on)
If a communication warning occurs on a channel that is not being monitored, the drive does not trigger a
communication interruption.
Enabling of Communication Channels
A communication channel is enabled once all the parameters involved have been written at least one
time.The drive is only able to start if all channels involved in command and reference value are enabled.
For example:
A drive in DSP402 profile is connected to an active communication channel.
It is mandatory to write at least 1 time the reference value and the command in order to switch from 4-
Switched on to 5-Operation enabled state.
A communication channel is disabled:
In the event of a communication warning.
In forced local mode.
NOTE: On exiting forced local mode:
The drive copies the run commands, the direction, and the forced local reference value to the active
channel (maintained).
Monitoring of the active channels for the command and reference value resumes following a time delay
[Time-out forc. local] FLOt.
Drive control only takes effect once the drive has received the reference value and the command from
the active channels.
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