Diagnostic Alarms - Siemens SIMATIC ET 200SP Equipment Manual

6.2

Diagnostic alarms

Enabling of diagnostics interrupts
You enable the diagnostics interrupts in the device configuration with the basic parameters.
The communications module can trigger the following diagnostics interrupts:
Table 6- 4
Diagnostics interrupt
• Parameter assignment error
• Error
• Wire break
• No load voltage
Reactions to a diagnostics interrupt
The following happens when an event occurs that triggers a diagnostics 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 diagnostics interrupt
OB (e.g. OB 82) is called. The event that triggered the interrupt is entered in the start
information of the diagnostics interrupt OB.
• The S7-1500 CPU remains in RUN even if no diagnostics interrupt OB is present in the CPU.
The communications 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).
CM PtP communications module (6ES7137-6AA01-0BA0)
Equipment Manual, 03/2021, A5E03790792-01
Possible diagnostics interrupts
Monitoring
Monitoring is always active. A diagnostics interrupt is trig-
gered each time an error is detected.
Monitoring is always active. An error detected only triggers a
diagnostics interrupt if "Activate break detection" and "Ena-
ble diagnostics interrupt" have been enabled in the device
configuration.
Monitoring is always active. An error detected only triggers a
diagnostics interrupt if "Missing supply voltage L+" has been
enabled in the device configuration.
Interrupts/diagnostics alarms
6.2 Diagnostic alarms
39