I created a Modbus RTU Slave program on B&R X20CP0484 using Automation Studio 6.5. I am sharing screenshots 1 to 5 showing my code and configuration, but communication is not working. Can anyone help me identify what is wrong? [Screenshot_2] [Screenshot_1]

Thanks Everyone my Problem is Solved. Modpoll Data Recive. [Screenshot_54]

Modbus RTU Slave Not Working on RS485 (X20CP0484)

MDParvezSarkar (MD Parvez Sarkar) June 17, 2026, 12:57pm 21

Thanks Everyone my Problem is Solved. Modpoll Data Recive.

Topic		Replies	Views
Beginner Help Needed: X20CP0484 PLC and X20CS1030 Modbus RTU Configuration Programming automation-studio	3	32	June 18, 2026
Modbus 485 Communication with Dual CS1030 Blocks in X20CP0482 Controls & Vision fieldbus , modbus	4	497	May 26, 2024
Extension module X90IF730.04-00 for X90CP174.48-00 485 with Modbus-RTU communication Controls & Vision modbus	4	163	December 6, 2024
Modbus RTU master with RS485 on PPC30 Error 20292 HMI & Visualization t-c-panels	5	163	July 25, 2025
DRV_mbus used for Modbus RTU slave of Modbus RTU 3rd party master B&R Software & Runtime modbus	12	133	May 10, 2026