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Siemens SIMATIC S7 CP340 - Page 55

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
55
Siemens AG 2014 All rights reserved
Fig. 99: Monitoring of receive data3
5.3 MODBUS Master protocol communication of CP441-2
5.3.1 Hardware catalog
RACK-400
6ES7400-1JA01-0AA0
PS407
6ES7407-0KA02-0AA0
CPU414-3
6ES7414-3XJ04-0AB0
CP441-2
6ES7441-2AA03-0AE0
Dongle
6ES7870-1AA01-0YA0
Dongle is installed in the same positions as S7-300 and CP341, and both are
behind the module. Refer to the pictures above.
5.3.2 Configuration
1. Open the created project ptp and insert a new SIMATIC 400 Station, and
change the station name to CP441-2 modbus Master. Double-click Hardware to
enter the hardware configuration screen, and insert RACK, PS, CPU and CP441-2.
The specific steps may be seen in the text above.
2. In the CP441-2 module, click Parameter to configure CP441-2 parameters, and
select MODBUS Master in Protocol options.

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