Diagnostics Alarms - Siemens SIMATIC S7-1500 Manual

5.3

Diagnostics alarms

A diagnostics alarm is output for each diagnostics event and the ERROR LED flashes on the
module. The diagnostics alarms can, for example, be read from 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
Short-circuit to ground
Wire break
Overflow
Underflow
Load voltage missing
Analog output module AQ 4xU/I ST (6ES7532-5HD00-0AB0)
Manual, 07/2014, A5E03484696-AC
Error code Meaning
1 Overload at output
H
Short-circuit of output Q
6 Encoder circuit impedance too high
H
Wirebreak between the module and
actuator
Channel not connected (open)
7 The output value set by the user pro-
H
gram exceeds the valid rated
range/overshoot range.
8 The output value set by the user pro-
H
gram undershoots the valid rated
range/undershoot range.
11 Supply voltage L+ of the module is
H
missing
Interrupts/diagnostics alarms
Remedy
Eliminate overload
to M Eliminate the short-circuit
V ANA
Use a different actuator type or
modify the wiring, for example, use
cables with larger cross-section
Connect the cable
Disable the channel ("output
•
type" parameter)
Connect the channel
•
Correct the output value
Correct the output value
Connect supply voltage L+ to
module
5.3 Diagnostics alarms
27