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Siemens SIMATIC S7 CP340 - Page 65

Siemens SIMATIC S7 CP340
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5 MODBUS RTU Protocol communication
CP340/CP341/CP440/CP441 Communication and Programming
Entry-ID: 88867653, V1.0, 02/2014
65
Siemens AG 2014 All rights reserved
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 compile the configuration information. If no error exists, select CPU
to download the configuration information as a whole, and use to check the
connection status online till "connection status" icon is displayed as:
to indicate correct connection. Just like MODBUS
communication with CP441, the "Startup" parameter in CPU properties shall also
be changed.
Fig. 120: Change "Startup" parameter in CPU properties

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