Diagnostics Alarms - Siemens simatic S7-1500 Manual

Interrupts/diagnostics alarms

5.3 Diagnostics alarms

5.3 Diagnostics alarms
Diagnostics alarms
A diagnostics alarm is generated and the ERROR LED flashes for each diagnostics event on
the module. You can read the diagnostics alarms, for example, in the diagnostics buffer of
the CPU. You can evaluate the error codes with the user program.
If the module is operated distributed with PROFIBUS DP in an ET 200MP system, you have
the option to read out diagnostics data with the instruction RDREC or RD_REC using data
record 0 and 1. The structure of the data records is available on the Internet in the "Manual
for interface module IM 155-5 DP ST (6ES7155-5BA00-0AB0)".
Table 5- 4 Diagnostics alarms, their meaning and corrective measures
Diagnostics alarm Error
code
Short circuit to 1
ground
Wire break* 6
Parameter assign- 10
ment error
Load voltage missing 11
* Wire break is also reported for short-circuit of actuator supply to L+. This can lead to inappropriate diagnostics for redun-
dant load control.
28
Meaning
Short-circuit or overload at the channel
H
Actuator circuit impedance too high.
H
Wire break between the module and actua-
tor
Channel not connected (open)
The module cannot evaluate parame-
•
H
ters for the channel
Incorrect parameter assignment
•
Supply voltage L+ of the module is missing Connect supply voltage L+ to mod-
H
Corrective measures
Check the wiring/actuator. Check
the ambient temperature.
Use different actuator type or wire differently,
e.g. use lines with bigger cross-section
Connect the cable
Disable diagnostics
•
Connect an actuator to a resistor in the
•
load resistance range
Correct the parameter assignment
ule/channel
Digital output module DQ 32x24VDC/0.5A HF (6ES7522-1BL01-0AB0)
Manual, 09/2016, A5E35683508-AB