Siemens SIMATIC ET 200AL System Manual page 328

Interrupts, error messages, diagnostics and system alarms
5.3 Alarms
5.3 Alarms
5.3.1 Diagnostics 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 diagnostics 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. If OB 82 is not available, the I/O controller goes into STOP mode.
You can find more information on this topic in the STEP 7 online help.
Reading out the diagnostics data
Table 5- 4
Automation system with
IO controller
SIMATIC S7
Additional information on the data records for PROFINET IO
The structure of the diagnostics data records and programming examples can be found in the
Programming Manual From PROFIBUS DP to PROFINET IO
(http://support.automation.siemens.com/WW/view/en/19289930) and in the Application
example (http://support.automation.siemens.com/WW/view/en/24000238).
32
Reading the diagnostics with STEP 7
Application
Diagnostics as plain text in STEP
7 in online and diagnostics view
"RDREC" instruction (SFB 52)
Reading data records from the
IO device
"RALRM" instruction (SFB 54)
Receiving alarms from the IO
device
See...
STEP 7 online help
• STEP 7 V13 and higher Func-
tion Manual PROFINET with
STEP 7 V13
(http://support.automation.si
emens.com/WW/view/en/499
48856)
• STEP 7 V5.5 and higher Sys-
tem Manual PROFINET Sys-
tem Description
(http://support.automation.si
emens.com/WW/view/en/192
92127)
IM 157-1 PN (6ES7157-1AB00-0AB0)
Equipment Manual, 05/2021, A5E32347036-AE