(Not Working ) Nucleo F767ZI communication Modbus RS 485 Using Max 485 Module

Posted by Kalai on Mon 29 Jul 2024 05:32 AM — 2 posts, 6,278 views.

Kalai Mon 29 Jul 2024 05:32 AM #0

Hi i am New for Arm mbed ,MY project is i want to Control 3 phase induction motor speed using VFD
Here my inovance VFD controlling by (RS 485 Communication Using Max 485 Module) STM 32 Nucleo F767ZI controller,

My slave ID -01,
Baud rate -9600.
modbus data format -8-N-2,

All my VFD Setting was done and Cross checked by USB to RS 485 Driver using modbuspoll Software.(Here i controlling Motor Speed and Direction)

my connection max 485 drive
Nucleo PD_6 (RX)->RO
RE and DE short connect Digital pin PC_8
Nucleo PD_5 (Tx)->DI

VCC connect 5V power supply
A connect VFD 485+
B connect VFD 485-
Gnd connect with GND

this photo is MY VFD Setting
IMG20240724184108

1920×2560 338 KB
Below i Attached my code

Nick Gammon Australia Forum Administrator Mon 29 Jul 2024 08:20 PM #1

Please post Arduino-related questions to the Arduino Forum or to StackExchange: Arduino. This saves splitting questions and answers between this forum and the Arduino ones.