8 Diagnostics processing
8.5 Overload/short circuit of the digital
outputs
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.
Table 41: Interpretation of channel errors
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.
The filter is used to avoid premature error messages when a capacitive load is
activated or an inductive load is deactivated, and during other voltage peaks
when a status changes.
In static state of the output channel, that is, while the channel is permanently
switched on or off, the filter time between error detection and the diagnostic
message is typically 5-10 ms.
The device sends the following PROFINET diagnostic message in this fault
case:
Channel number of diagnosis
0x05 - 0x08
Channel related diagnosis
code
0x0109
Channel related diagnosis
code message
Short circuit or overload of digital output at Pin 2/Ch. B of Type B IO-
Port, detected by IO-Link Master
Manual LioN-P PROFINET IO-Link Master
Version 2.1 10/2017
81
