Belden 934 691-001, Technical Manual

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Diagnostics processing
Technical manual LioN-P/ -R EtherNet/IP
Release 1.4 02/2016
9.1 Channel error
53
9 Diagnostics processing
The modules provide advanced diagnosis 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.
9.1 Channel error
A channel error is determined by comparing the target value set by a
controller and the actual value of an output channel.
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
of the module. The value of this parameter can range from 0 to 255 ms; the
factory setting is 80 ms.
Target value Actual value Comment
Active Active OK, no diagnosis
Off Off OK, no diagnosis
Active Off Short-circuit

Channel indicator is red.

Channel error bit in the diagnosis is set.

Channel is locked after the error is rectified.
Off Active Voltage is fed back in

Red and yellow/white channel indicators are activated.

Channel error bit in the diagnosis is set.

Channel is not locked after the error is rectified.
Table 28: Interpretation of channel errors
Note
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.