11/8/2016 4:12 PM | |
Posts: 10 Rating: (0) |
hi Denilson Pegaia, I communication s7-1500cpu with Temperature Controller by485 module : protocol modbus-rtu to read temperature. ( i select mode 4 : Half duplex (RS485) two-wire mode ) when I connected a distance of about 2 meters, communication ok but distance of abouts 30 meters, communication error. RXD lamp always light. i use LAPP KABLE cable. pls help me check why error ------------------------------------------------------------------------------------------ |
Last edited by: The Helping Hand at: 11/8/2016 7:50:59 PMNew subject after splitting |
|
11/9/2016 7:41 AM | |
Joined: 10/18/2014 Last visit: 9/16/2024 Posts: 95 Rating: (15) |
Hi as William said try increasing your communication baud rate in modbus communication. also use proper shielded cable for connection between plc & temperature controller, make proper grounding to shield of communication cable. i think this will help you suppressing noise to ground so you can receive proper signal from device to plc. need further configuration & error details so we can look for further solution... |
Ganesh-0220 |
|
Follow us on