Diagnostic Alarms - Siemens SIMATIC S7-1500/ET 200МР Manual

Interrupts/diagnostic messages

5.2 Diagnostic alarms

5.2 Diagnostic alarms
Enabling of diagnostic interrupts
You enable the diagnostic interrupts in the device configuration with the basic parameters.
The technology module can trigger the following diagnostic interrupts:
Table 5- 4 Possible diagnostic interrupts
Diagnostic interrupt
• Parameter error
• Hardware interrupt lost
• Watchdog tripped. Module is defective.
• Wire break at digital input A, B or N
• Supply voltage missing
• Short-circuit / overload at external encoder supply
• Error at digital outputs
• Invalid transition of A/B signals
Not available in "Position detection for "Motion Control"" technology object" and ""Fast Mode"" operating modes
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Reactions to a diagnostic interrupt
The following happens when an event occurs that triggers a diagnostic interrupt:
• The ERROR LED flashes red.
Once you have remedied the error, the ERROR LED goes out.
• The S7-1500 CPU interrupts 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 operated as a distributed module with PROFIBUS DP in an ET 200MP system,
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 155-5 DP ST interface module available for download on the Internet
(https://support.industry.siemens.com/cs/ww/de/view/78324181).
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Monitoring
Monitoring is always active. A diagnostic interrupt is trig-
gered each time an error is detected.
Monitoring is active if a push-pull switching encoder has
been configured. When an error is detected, a diagnostic
interrupt is only triggered if "Enable diagnostic interrupt on
wire break" is activated in the device configuration.
Monitoring is always active. When an error is detected, a
diagnostic interrupt is only triggered if "Enable additional
diagnostic interrupts" is activated in the device configura-
tion.
Technology module TM Count 2x24V (6ES7550-1AA01-0AB0)
Equipment Manual, 12/2020, A5E31870371-AC