Diagnostics Alarms - Siemens SIMATIC ET 200AL Manual

5.3

Diagnostics alarms

A diagnostics alarm is output for each diagnostics event. The DIAG LED flashes red on the
analog output module. The diagnostics alarms are listed in the diagnostics buffer of the CPU.
You can evaluate the error codes with the user program.
The following tables set out the diagnostics alarms for the set measuring range.
Table 5- 5
Diagnostics alarm Error
Wire break
High limit violat-
ed
1
Low limit violated
Error
Parameter error
Reference channel
error
Hardware inter-
rupt lost
= The alarm depends on the configured measuring range.
1
= For resistor and thermal resistor measuring ranges with deactivated diagnostics for "wire
2
break", this is reported by the "Violation of high limit" diagnostic.
Analog input module AI 4xRTD/TC 4xM12 (6ES7144-5KD50-0BA0)
Equipment Manual, 08/2020, A5E48753535-AA
Diagnostics alarms, their meaning and remedies
Meaning
code
6 Wire break between the module
H
and sensor
Channel not connected (open)
7 Value is above overrange.
H
Wire break
2
8 Value is below underrange.
1
H
9 Value is significantly above or be-
H
low underrange/overrange.
10
• The module cannot evaluate
H
parameters for the channel
• Module parameter assignment
is faulty
15 Data record 192 ... 195 was not
H
correctly cyclically received within
5 min
16 At least one hardware interrupt was
H
not signaled because too many
hardware interrupts are pending.
Interrupts/diagnostics alarms
5.3 Diagnostics alarms
Remedy
Connect the cable
• Deactivate diagnostics
• Connect channel
• Deactivate channel
Correct interplay between module
and sensor
See wire break
Correct interplay between module
and sensor
Correct interplay between module
and sensor
Correct the parameter assignment
(wire break diagnostics set only
with the permitted measuring
ranges).
Write data record 192 ... 195
Correct the program or the process
39