Configuration control (option handling)
7.3 Creating the control data record
Distributed I/O system
System Manual, 02/2018, A5E31861578-AF
61
Note
The data in the feedback data record is always mapped for all modules. In a Shared Device
configuration, it is therefore irrele
vant which IO controller the respective modules are
As long as no control data record was sent, a one
-to-one module assignment is assumed for
the compilation of data record 197 (station master
→ station option).
In the case of an error when reading the feedback data record, the RDREC instruction
returns the following error messages via the STATUS block parameter:
Table 7- 4 Error messages
Invalid length; the length information in data record 197 is not correct.
H
Configuration control not configured
80B8
H
Parameter error
The following events cause a parameter error:
• Incorrect block ID in the header (not equal to 197)
• Invalid version identifier in the header
• A reserved bit was set
• Multiple slots in the station master are assigned to the same slot in the station
option
Example of a configuration control
Introduction
Several options/functional variations often exist for machines designed as series products.
Or you have a plant that can operate in different modes.
Combine the modules that are needed for a function. With configuration control (option
handling), you have the option to switch these functions on and off or expand their
configuration.
The following examples show how you can form the control data record for a station option.
The station master consists of an interface module IM 157-1 PN and 15 I/O modules in this
case.
Station option with associated control data record
The configuration with the station options 2 and 4 differ from the station master as follows:
● The modules for options 1 and 3 do not exist.
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