Siemens SIMATIC ET 200SP Manual - Page 25

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5.3

Alarms

Actions after a diagnostics alarm
There can be more than one diagnostic alarm at a given time. Actions initiated by
diagnostics 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 diagnostics alarms are saved to the diagnostics buffer of the I/O controller.
● OB 82 is called.
You can find more information on this topic in the STEP 7 online help.
Reading out the diagnostics data
Table 5- 6
Automation system with
IO controller
SIMATIC S7
Additional information on the data records for PROFINET IO
The structure of the diagnostic data records and programming examples are available in the
programming manual From PROFIBUS DP to PROFINET IO
(http://support.automation.siemens.com/WW/view/en/19289930) and in Application example
(http://support.automation.siemens.com/WW/view/en/24000238).
Causes of error and corrective measures
The causes of error and corrective measures for the diagnostics alarms are described in the
manuals for I/O modules
(http://support.automation.siemens.com/WW/view/en/55679691/133300) in the chapter,
"Interrupts/diagnostics alarms".
IM 155-6 PN BA interface module (6ES7155-6AR00-0AN0)
Manual, 03/2015, A5E34934425-AA
Interrupts, error messages, diagnostics and system alarms
Reading the diagnostics with STEP 7
Application
Diagnostics as plain text in
STEP 7 in online and diagnos-
tics view
Instruction "RDREC" (SFB 52)
Read data records from the IO
device
Instruction "RALRM" (SFB 54)
Receive interrupts from the IO
device
See...
STEP 7 online help
As of STEP 7 V13, function manual
•
PROFINET with STEP 7 V13
(http://support.automation.siemens.
com/WW/view/de/49948856/0/en)
As of STEP 7 V5.5 system manual
•
PROFINET System Description
(http://support.automation.siemens.
com/WW/view/en/19292127)
5.3 Alarms
25