Alarms; Diagnostics Alarms - Siemens SIMATIC ET 200SP IM 155-6 PN/2 HF Manual

5.3

Alarms

5.3.1

Diagnostics alarms

Actions after a diagnostics alarm
There can be more than one diagnostics alarm at the same time. Each diagnostics alarm
initiates the following actions:
● The ERROR LED of the interface module flashes.
● Diagnostics are reported as diagnostic error 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.
● (S7-300/400) The diagnostic interrupt OB is called. If the diagnostics interrupt OB (OB 82)
is not available, the IO controller goes into STOP mode.
You can find more information in the STEP 7 online help.
Reading the diagnostics
Table 5- 5
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 Example application
(http://support.automation.siemens.com/WW/view/en/24000238).
Interface module IM 155-6 PN/2 HF (6ES7155-6AU01-0CN0)
Manual, 10/2018, A5E03915895-AH
Interrupts, error messages, diagnostics and system alarms
Reading the diagnostics with STEP 7
Application
Diagnostics as plain text in
STEP 7 using Online and Diag-
nostics view
Instruction "RDREC" (SFB 52)
Read data records from the IO
device
Instruction "RALRM" (SFB 54)
Receive interrupts from the IO
device
5.3 Alarms
See...
STEP 7 online help
as of STEP 7 V12, function
•
manual PROFINET with
STEP 7 as of V12
(http://support.automation.si
emens.com/WW/view/en/49
948856)
as of STEP 7 V5.5, system
•
manual PROFINET System
Description
(http://support.automation.si
emens.com/WW/view/en/19
292127)
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