i have a question about using protocol fb. i have a phoenix empro ma250 power meter which can aommunicate using modbus rtu. i can communicate with the power meter using read holding register modbus fb flawlessly. what i want to do is use protocol fb to generate the send and receive modbus frame messages. i am having trouble constructing the messages in protocol fb. i have attached a picture of the frame structure of the meter. iam using a v350 for this, with one port for modem and the other port for the device/s. i wish to use protocol fb instead of modbus fb because i want to connect other devices that don't use modbus protocol. i hope anyone can help me.
protocol fb question.bmp