Siemens CB1241 Modbus communication

Siemens CB1241 Modbus communication

This blog is going to cover how to control a variable frequency drive using Modbus from an S7-1200 controller. The CB 1241 Module will be used to communicate with the VFD through Modbus RTU over RS485. The VFD will be driving a conveyor belt in a vision inspection system which will feature in future posts. For this example, the VFD will control a HVAC fan as a demonstration only....

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