Siemens SIMATIC ET 200AL System Manual page 1827

Functions
5.10 Standard machine projects
Procedure
To configure an IO device as optional IO device, proceed as follows:
1. Create a project.
2. Configure an S7-1500 CPU firmware version V1.7 or higher as IO controller.
3. Configure the required IO devices and assign the IO devices to the IO controller.
4. Select the IO device you want to mark as optional.
5. Select the area "PROFINET interface [X1]" > Advanced options".
6. Enable the "Optional IO device" option.
Figure 5-99
7. Repeat steps 4 to 6 for all IO devices to be configured as optional.
8. Load the configuration onto the CPU.
Result: Once this configuration is loaded, the system behavior is as follows:
• The CPU is prepared for the configuration control of the IO system.
• All IO devices are disabled.
• Irrespective of whether you customize the configuration with the user program (adding
optional IO devices) or make no changes to the loaded configuration: You must call the
instruction "ReconfigIOSystem" in the user program and notify the current configuration
to the system!
The system will not be operational without calling the instruction "ReconfigIOSystem".
For further information on the proceeding see Enabling optional IO devices in the
program (Page 1).
Fast parameter assignment in the "IO communication" table
You can also specify whether or not an IO device is optional in the "IO communication" tab.
In an additional "Optional IO device" column, a selectable check box is available for each IO
device that indicates whether or not an IO device is optional. Here, you can adjust the setting
centrally.
262
Configure the IO device as an optional IO device
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL