Interrupts, diagnostics, error, and system messages
5.3 Alarms
IM 155-6 PN ST interface module (6ES7155-6AU01-0BN0)
Manual, 04/2017, A5E03576904-AE
35
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. 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.
●
OB 82 is called. If OB 82 is not available, the I/O controller goes into STOP mode.
You can find more information in the STEP 7 online help.
Reading the diagnostics
Table 5- 6
Reading the diagnostics with STEP 7
Automation system with IO
controller
Application
See...
SIMATIC S7
Diagnostics as plain text in STEP 7
using Online and Diagnostics view
STEP 7 online help
•
as of STEP 7 V12 function
manual PROFINET with
STEP 7 V13
(
http://support.automation.siem
ens.com/WW/view/en/4994885
6
)
•
as of STEP 7 V5.5 system
manual PROFINET System
Description
(
http://support.automation.siem
ens.com/WW/view/en/1929212
7
)
Instruction "RDREC" (SFB 52)
Read data records from the IO
device
Instruction "RALRM" (SFB 54)
Receive interrupts from the IO
device
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
).
