Diagnostics Alarms - Siemens SIMATIC ET 200SP Manual

5.3

Diagnostics alarms

A diagnostics alarm is generated and the DIAG-LED flashes 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.
Table 5- 4 Diagnostics alarms, their meaning and corrective measures
Diagnostics alarm
Short-circuit (encoder
supply)
1
Wire break (current 4
to 20 mA)
High limit violated
Low limit violated
Error
Parameter assignment
error
Supply voltage missing 11
Channel temporarily
unavailable
Since the module has no encoder supply for separate channels, a short-circuit in a channel
1
has a permanent effect on the other channel.
Analog input module AI 2xI 2/4-wire ST (6ES7134-6GB00-0BA1)
Manual, 12/2015, A5E36104399-AA
Error code Meaning
1 Encoder supply to ground
H
Input after encoder supply
6 Impedance of encoder circuit too high
H
Wire break between the module and sen-
sor
Channel not connected (open)
7 Value is above the overrange.
H
8 Value is below the underrange.
H
9 Internal module error has occurred (diag-
H
nostics alarm on channel 0 applies for the
entire module).
10
The module cannot evaluate parame-
•
H
ters for the channel.
Incorrect parameter assignment.
•
Missing or insufficient supply voltage L+
H
1F Firmware update in progress or update has
H
been canceled.
The module does not read any process
values in this state.
Interrupts/diagnostics alarms
5.3 Diagnostics alarms
Solution
Correct interplay between module and
encoder
Use a different encoder type or modify
the wiring, e.g. use cables with larger
cross-section
Connect the cable
Deactivate channel
•
Connect the encoder contacts
•
Correct interplay between module and
encoder
Correct interplay between module and
encoder
Replace the module
Correct the parameter assignment
(wire break diagnostics set only with
the permitted measuring ranges).
Check supply voltage L+ on the
•
BaseUnit
Check BaseUnit type
•
Wait for firmware update.
•
Restart the firmware update.
•
23