Siemens SIMATIC S7-300 - Manual (Page 48)

4 Configuring
the control in
STEP 7 Lite
44
SIMATIC S7-300 Getting Started for First Time Users
Getting Started, 04/2007, 6ZB5310-0NC02-0BA0
Checking the module configuration
1. Check to make sure that the configuration data on the PC (offline)
matches the configuration data on the CPU 312C (online). STEP 7 Lite
then checks whether downloadable system data can be generated from
the current configuration.
You can see detailed results of the hardware comparison below the configuration
table. All modules must be identical in order for the proper inputs and outputs to
be addressed when the control program runs.