Siemens SIMATIC ET 200AL - Page 1078

Functions
5.2 Intelligent IO devices (I-devices)
PROFINET with STEP 7 V15
Function Manual, 12/2017, A5E03444486-AH
131
Operating state changes and station failure / station return
In the following table, you can see which consequences an operating state change or the
failure of an IO controller / I-device of the SIMATIC family has on the respective other(s):
Table 5- 1 Operating state changes and station failure / station return
Initial status
Event
I-device response
Higher-level IO controller
I-device CPU is
in RUN, higher-
level IO control-
ler is in RUN
The I-device CPU
changes to STOP
- During the updating of the process image
with the instructions "UPDAT_PI" and
"UPDAT_PO" an error report is returned at
the parameter RET_VAL.
With direct IO access to all transfer areas
to the I-device: depending on the type of
error handling, e.g., call of OB 122 (IO
access error).
I-device CPU is
in STOP higher-
level IO control-
ler is in RUN
The I-device CPU
is starting up
Call of OB 100 (startup).
Call of OB 83 (pull/plug) for input
transfer areas to the higher-level IO
controller.
Until call of OB 83 in the case of
direct access to the input transfer
areas to the higher-level IO control-
ler: depending on the type of error
handling, e.g., call of OB 122 (IO
access error).
Call of OB 83 (pull/plug) for all transfer
areas to the I-device.
Until call of OB 83 in the case of direct
access to the transfer areas to the I-
device: depending on the type of error
handling, e.g., call of OB 122 (IO access
error).
I-device CPU is
in RUN, higher-
level IO control-
ler is in RUN
The higher-level
IO controller chan-
ges to STOP
During the updating of the process
image with the instructions
"UPDAT_PI" and "UPDAT_PO" an
error report is returned at the para-
meter RET_VAL.
With direct IO access to the input
transfer areas to the higher-level IO
controller: depending on the type of
error handling, e.g., call of OB 122
(IO access error).
Note: Output transfer areas can still
be accessed.
-
Higher-level IO
controller is in
STOP, I-device
CPU in RUN
The higher-level
IO controller starts
up
Call of OB 83 (pull/plug) for input
transfer areas to the higher-level IO
controller.
Until call of OB 83 in the case of
direct access to the input transfer
areas to the higher-level IO control-
ler: depending on the type of error
handling, e.g., call of OB 122 (IO
access error).
Call of OB 100 (startup).