Alarms; Diagnostic Alarms - Siemens SIMATIC ET 200MP Equipment Manual

6.3

Alarms

6.3.1

Diagnostic alarms

Actions after a diagnostic alarm
There can be more than one diagnostic alarm at the same time. Each diagnostic alarm
initiates the following actions:
• The ERROR LED of the interface module flashes.
• Diagnostics are reported as diagnostic interrupts to the CPU of the IO controller and can be
read via data records.
• Incoming diagnostic alarms are saved to the diagnostic buffer of the IO controller.
• (S7-300/400) The diagnostic interrupt OB is called. If the diagnostic interrupt OB (OB82) is
not available, the IO controller goes into STOP mode.
You can find additional information in the STEP 7 online help.
Reading out the diagnostics
Table 6- 2
Automation system
with IO controller
SIMATIC S7
Additional information on the data records for PROFINET IO
You can find the structure of the diagnostic data records and programming examples in the
programming manual From PROFIBUS DP to PROFINET IO
(http://support.automation.siemens.com/WW/view/en/19289930) and in the application
example on the Internet (http://support.automation.siemens.com/WW/view/en/24000238).
Interface module IM 155-5 MF HF (6ES7155-5MU00-0CN0)
Equipment Manual, 11/2023, A5E53268530-AA
Reading out the diagnostics with STEP 7
Application
Diagnostics as plain text in STEP 7
using online view and diagnostic
view
Instruction "RDREC"
Read data records from the IO
device
Instruction "RALRM"
Receive interrupts from the IO
device
Interrupts and diagnostic, error, and system alarms
See...
Online help of STEP 7 and
• As of STEP 7 V12 PROFINET with STEP 7
V12 function manual
(http://support.automation.siemens.co
m/WW/view/en/49948856)
• As of STEP 7 V5.5 PROFINET System
Description
(http://support.automation.siemens.co
m/WW/view/en/19292127) manual.
6.3 Alarms
51