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I was wondering if anybody has some sample ladder logic for reading/writing data to two servo drives ( specifically SureServo model SVA-2100) using a V570 OPLC. The PLC will be the master and both drives will be slaves. I will be using discrete I/O to initiate moves and the Modbus will be used to preset various parameters( speed, position, accel/decel, etc.) I have not used Modbus before and would also appreciate any tips and recommendations regarding program structure and Modbus FB's.


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