Alarms; Diagnostic Alarms - Siemens SIMATIC ET 200MP Manual

4.3

Alarms

4.3.1

Diagnostic alarms

Requirement
In order to generate diagnostics, the IM 155-5 PN BA interface module parameters must
have been assigned once.
Actions after a diagnostic alarm
There can be more than one diagnostic alarm at the same time. Actions initiated by
diagnostic alarms:
● The ERROR LED of the interface module flashes.
● Diagnostic data is 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.
● The diagnostic interrupt OB is called. If the diagnostic interrupt OB is not available, the IO
controller goes into STOP mode.
You can find additional information in the STEP 7 online help.
Reading out the diagnostic data
Table 4- 3
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
(https://support.industry.siemens.com/cs/ww/en/view/19289930) and in the application
example on the Internet (https://support.industry.siemens.com/cs/ww/en/view/24000238).
Causes of error and troubleshooting
The error causes and corrective measures of the diagnostic alarms are described in the
manuals for the I/O modules (https://support.industry.siemens.com/cs/ww/en/ps/14039/man)
in the Interrupts/Diagnostic alarms section.
Interface module IM 155-5 PN BA (6ES7155-5AA00-0AA0)
Manual, 02/2017, A5E38017683-AA
Reading out the diagnostic data with STEP 7
Application
Diagnostic data 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 V14 PROFINET with
STEP 7 V14 function manual
(https://support.industry.siemens.
com/cs/ww/en/view/49948856)
4.3 Alarms
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