Siemens SIMATIC ET 200AL, System Manual

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Configuration control (option handling)
7.3 Creating the control data record
Distributed I/O system
System Manual, 08/2021, A5E31861578-AJ
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Rules
Observe the following rules:
•
Slot entries in the control data record outside the station master are ignored by the
interface module.
• The control data record must contain the entries up to the last slot of the station option.
• Each slot of a station option may only be present once in the control data record.
• Each slot of a station option may only be assigned to one slot in the station master.
• The interface module (slot 0) is not an element of the configuration control, but instead
controls this.
• The topology modules always have to exist in the data record:
– The topology module ET-Connection 1 is always located on Slot 1.
– The topology module ET-Connection 2 is always located on Slot 18.
7.3.2 Control data record for the ET 200AL distributed I/O system
Slot assignment
Note
Topology modules ET-Connetion1 and ET-Connection2
Both topology modules ET-Connection1 and ET-Connection2 should be treated like real
modules during configuration control.
Restriction: ET-Connetion1 is always placed in Slot 1 and ET-Connection2 is always placed in
Plot 18.
The following table shows the possible slots for the various modules for an
ET 200AL interface module:
Table 7- 1 Slot assignment
Modules Possible slots Comment
Topology ET-Connection1 1 The topology module ET-Connection 1 is always located on
Slot 1.
I/O modules ET-Connection1 2-17 -
Topology module ET-Connection2 18 The topology module ET-Connection2 is always located on
Slot 18.
I/O modules ET-Connection2 19-34 -