Diagnostic Alarms - Siemens SIMATIC ET 200SP Manual

Interrupts/diagnostic alarms

5.2 Diagnostic alarms

5.2 Diagnostic alarms
Enabling the diagnostic interrupts
You enable the diagnostic interrupts at the basic parameters.
The technology module can trigger the following diagnostic interrupts:
Table 5- 4
Diagnostic interrupt
•
•
•
•
•
Reactions to a diagnostic interrupt
The following happens when an event occurs that triggers a diagnostic interrupt:
• The DIAG LED flashes red.
When you have eliminated all errors, the DIAG LED stops flashing red and turns green.
• The S7-1500 CPU interrupts the processing of the user program. The diagnostic interrupt
OB (e.g. OB 82) is called. The event that triggered the interrupt is entered in the start
information of the diagnostic interrupt OB.
• The S7-1500 CPU remains in RUN even if no diagnostic interrupt OB is present in the CPU.
The technology module continues working unchanged if this is possible despite the error.
You can obtain detailed information on the error event in the error organization block with
instruction "RALRM" (Read additional alarm information), in the information system of STEP 7
and in function manual Diagnostics
(https://support.industry.siemens.com/cs/ww/en/view/59192926), section "System
diagnostics in user program".
If the module is being operated as a distributed module in an ET 200SP system with
PROFIBUS DP, you have the option of reading out diagnostic data with the RDREC or RD_REC
instruction using data record 0 and 1. You can find the structure of the data records in the
manual for the IM 155-6 DP HF interface module available for download on the Internet
(https://support.industry.siemens.com/cs/ww/en/view/73098660).
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Possible diagnostic interrupts
Error
Parameter assignment error
Channel/component temporarily
unavailable
Supply voltage missing
Error at the digital outputs
Monitoring
Monitoring is always active. A diagnostic interrupt is trig-
gered each time an error is detected.
Monitoring is always active. A detected error only triggers a
diagnostic interrupt if "Enable diagnostic interrupts" has
been enabled during device configuration.
The diagnostic interrupts are not enabled in the default
setting.
Technology module TM PTO 2x24V (6ES7138‑6EB00‑0BA0)
Equipment Manual, 09/2021, A5E50983437-AA