Im using AB7702-B to connect and forward the signal from a CET PMC-33M-A , a Digital
Multifunction Meter , this one is using modbus RTU. The problem is i cannot poll the modbus signal to the Meter through AB7702
These followings are things i have checked:
1.All the cable is fine , the pins is connected correctly and not damaged
2.The baudrate, format , ID are correct
3.I can poll modbus from the Meter normally when connect its directly to PC through RS485 RTU - USB cable
4.The AB7702 can forward TCP modbus signal from other devices (i used netbiter IOX-DAIO) , RTU of course
Thank you for reading, do you have any idea about this problem?