How read Modbus data from Master device where com3 as Slave?
I am configuring a HMI and it is as Modbus Master .And PM864 com3 as slave. I can read data from controller via access variable. Variable name as %MW10#..
But how to read data from HMI. hmi write tag 400001 to...
Please help me.
Have you look at the application
It includes description file in doc format
I don't know which blocks are you using for read/write.
Please provide a screen shot for your code, using COM3 as a slave
Here is example for reading using COM3 as Modbus Master:
- the parameter start_addr_1 = string=retain='%MW10#0' (that is start address only and must be string)
- the parameter Rd... = must be INT or DINT (that is the real data which you should read). Modbus supports only integer and boolean variables