audi0615 - 2021-02-22


I'm trying to implement Modbus RTU Master(Client) using IoDrvModbus Library (without GUI Interface)
Everything works fine except when the Master receive ErrorCode 5 : Acknowledge (Notification of a Slave that a lengthy operation being started).
My questions are as follow.

1) When the master receives "Acknowledge" from the slave, which output from FB ModbusRequest2 is TRUE? (xDone or xBusy or xError)

2) While the lengthy operation is being done from the server, what the master should do? just wait?

3) when the operation is done, does the slave send response data to the master automatically? if the master needs to poll the data, how? just send the same request?


Last edit: audi0615 2021-02-22