Siemens S7-300 用户手册

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SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
4.3 Reproducing the module configuration in 
STEP 7 Lite
In the STEP 7 Lite project, you will create all of the modules you installed on the 
mounting rail. 
Creating the module configuration
1. Create a new S7-300 station.
Four mounting rails are automatically displayed.