Siemens SIMATIC ET 200AL System Manual page 271

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 modules 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.
Diagnostics interrupt
You can use this parameter to enable or disable diagnostics interrupts.
Hardware interrupt
You can use this parameter to enable or disable hardware interrupts.
Pull/plug module interrupt
You can use this parameter to enable or disable pull/plug module interrupts.
IM 157-1 DP (6ES7157-1AA00-0AB0)
Equipment Manual, 08/2021, A5E32100641-AE
Parameters
4.2 Explanation of the parameters
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