Siemens SIMATIC S7 CP340 Programming Manual page 65

5 MODBUS RTU Protocol communication
10. After completing configuration, click OK and save it, and close the dialog box.
Just like ASCII-2 as stated above, create PtP connection for the used interface,
and record the Local ID (Hex) connection number.
Fig. 119: Configuration connection
11. Click
to download the configuration information as a whole, and use
connection status online till "connection status" icon is displayed as:
communication with CP441, the "Startup" parameter in CPU properties shall also
be changed.
Fig. 120: Change "Startup" parameter in CPU properties
CP340/CP341/CP440/CP441 Communication and Programming
Entry-ID: 88867653, V1.0,
to compile the configuration information. If no error exists, select CPU
to indicate correct connection. Just like MODBUS
02/2014
to check the
65