Siemens SIMATIC ET 200AL - Page 164

Parameters
4.2 Explanation of the parameters
Interface module IM 157-1 DP (6ES7157-1AA00-0AB0)
Manual, 12/2016, A5E32100641-AD
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4.2
Explanation of the parameters
Configuration control
You can use this parameter to enable the configuration control function in the ET 200AL
distributed I/O system.
Note
Configuration control
The configuration control function can only be used if you set the "Start
up if preset
configuration does not match actual configuration" parameter to "YES".
Note
Configuring the enable
If you configure the enable, the ET
200AL distributed I/O system requires a control data
record 196 from the user program in order for the
ET 200AL distributed I/O system to
operate the I/O modules.
Additional information is available in the section Configuration control (option handling).
Startup if preset configuration does not match actual configuration
Enabled parameter
If the preset/actual configuration differ,
a
data exchange occurs between the DP master and
the ET 200AL distributed I/O system.
Disabled parameter
If the preset/actual configuration differ,
no
data exchange occurs between the DP master
and the ET 200AL distributed I/O system.
Note
More than 16 I/O modules in real configuration per ET-Connection line
The preset/actual configuration do not match parameter is valid for 16 I/O modules per ET
-
Connection line.
Up to 16 I/O modules are recognized per line. Additional I/O mod
ules are not recognized. A
diagnostics alarm is not issued for these I/O modules. All I/O modules in the actual system
after the 16th I/O module remain unconfigured (LED DIAG flashes green) and are not
involved in the data exchange.