Yaskawa MP920 User's Manual Design - Manual (Page 351)

6.2 System Startup Procedure
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e) Set the I/O start register numbers (0 for DI-01, 10 for D0-01).
This completes the module allocation procedure.
5. Use the following procedure to set information on the MP920 Modules.
a) Double-click slot No. 00.
b) Click the Yes button in the following message box.
c) Click the OK button in the following message box.
The Generic Serial Window will be displayed.
d) Check the CIR#01 and CIR#02 settings.