Siemens SIMATIC ET 200S - How Option Handling Works

Configuration Options
3-35
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
How it works
At option handling, the configuration of slots 2 to 63 of the ET 200S is checked. If
the check is enabled for a slot, the RESERVE module (option) or the configured
electronic module can take up this slot without a diagnosis being reported. If the
check is disabled, only a configured electronic module can be located in this slot.
Any other module will trigger a diagnosis. You can control the configuration of slots
2 to 63 and monitor the configuration of slots 1 to 63 using the control and
feedback interface in the process input/output image (PII) and (PIQ).
Bit in PII = 0
Is the configured
electronic module inserted?
Slot
enabled (configuration in
HWCONFIG)
?
Slot
enabled in PIQ
(bit in PIQ**=0)
?
Is the
RESERVE module inserted
or is there an empty slot at the
right-hand end of the
ET 200S station
?
No error
No diagnosis
No error
Bit in PII* = 1
Preset <> actual configuration
Diagnosis is reported
Incorrect module
Removed module
Yes
No
No
No
Yes
Yes
Yes
No
* PII = process input image
** PIQ = process output image
The setting of the parameter ”Operation at Preset <> Actual
configuration” is not relevant for the process illustrated.
Figure 3-9 How option handling works