Interrupts; Diagnostics Alarms - Siemens SIMATIC ET 200SP Equipment Manual

6.2

Interrupts

The DQ 16×24VDC/0.5A HF digital output module supports diagnostic interrupts.
Diagnostics interrupts
The module generates a diagnostic interrupt for the following events:
• Short circuit
• Wire break
• Parameter assignment error
• Supply voltage missing
• Channel/component temporarily unavailable
Detailed information on the event is available in the STEP 7 online help.
6.3

Diagnostics alarms

A diagnostics alarm is generated and the DIAG-LED flashes red on the module for each
diagnostics event. You can read out the diagnostics alarms, for example, in the diagnostics
buffer of the CPU. You can evaluate the error codes with the user program.
NOTE
Wiring two outputs in parallel
When connecting two outputs in parallel for redundant control of a load, the channel
diagnostics "Short circuit to L+" and "Wire break" must be disabled, otherwise faulty
diagnostics alarms may occur.
Table 6-5 Diagnostics alarms, their meaning, and remedial measures
Diagnostics alarm Error code
Short circuit 1
H
Wire break 6
H
1 Only in switched state (output value 1)
Only in non-switched state (output value 0)
2
Digital output module DQ 16x24VDC/0.5A HF (6ES7132-6BH00-0CA0)
Equipment Manual, 01/2024, A5E52818470-AA
Meaning
• Short circuit of actuator supply to
1
ground
• Short circuit of actuator supply to L+
Actuator circuit impedance too high
Wire break between the module and actuat­
or
Channel not connected (open)
Interrupts/diagnostics alarms
6.3 Diagnostics alarms
Solution
Correct the process wiring
2
Use a different actuator type or modify the
wiring, e.g. use cables with larger cross-
section
Connect the cable
• Disable diagnostics
• Connect a resistor to the actuator con­
tacts in the load resistance range
33