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Naomi Nosonovsky
>G'Day everyone,
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>Looking for guide to VFP Modbus RTU development.
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>Could any one can help to show an example on how to request data from Modbus RTU ? and how to calculate the CRC16 and checksum.
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>Thanks and best regards,
Could you be a bit more specific about your needs. Modbus RTU is a simple serial communication protocol mainly used by industrial controllers (PLC, PAC) and various other devices. It is a Master/Slave protocol and is one-master-to-many-slaves. Communication is simple bit-level communication, usually over RS-485. The important question is what are you communicating with and how and to what end?
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