7 Diagnostics processing
7.1 Channel error
7 Diagnostics processing
The modules provide advanced diagnostic behavior, in particular for the
output channels to determine errors in the transmission. The firmware of the
modules distinguishes between 5 different types of error.
7.1 Channel error
A channel error is determined by comparing the target value set by a controller
and the actual value of an output channel.
Target value Actual
value
Comment
Active
Active
OK, no diagnostic
Off
Off
OK, no diagnostic
Active
Off
Short-circuit
Channel indicator is red.
Channel error bit in the diagnostic is set.
Channel is locked after error is removed.
Off
Active
Voltage is fed back in
Red and yellow/white channel indicators are activated.
Channel error bit in the diagnostic is set.
Channel is not locked after error is removed.
Table 66: Interpretation of channel errors
Attention:
If both output channels of an M12 slot are activated when
a channel error occurs, the controller locks both channels, even if only
one channel is affected by the error. If only one channel is activated,
the controller only locks this one. Locked channels are deactivated
and remain in the
Off
state if you do not reset them using the controller.
When an output channel is activated (rising edge of the channel state) or
deactivated (falling edge), the channel errors are filtered for the period that
you set using the "Surveillance Timeout" parameter during the configuration
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