Melsec Serial Communication Python

Eagle Layout Editor 4.11 Ware on this page. MELSEC iQ-R Serial Communication Module User's Manual. Do not install the control lines or communication cables. MELSEC iQ-R Serial Communication. Java Program Grocery Receipt. This manual explains the communication specifications and settings of the serial communication of FX5. MELSEC iQ-F FX5 User's Manual (Serial Communication).

Does anyone know the communication protocol for communication with the RS232 port of a Mitsubishi FX3G PLC? I searched the site of Mitsubishi and Googled, but couldn't find the syntax of the commands to send to obtain the data of specific registers in the PLC. I found the following parts of the command though: • BR = bit read • BW = bit write • WR = word read • WW = word write I could not find though wether i should use a straight cable, or a crossed cable, and not even at which baudrate i should communicate (or other settings like data bits, stop bits, and parity) Does anyone have any experience with RS232 communication with a FX3G PLC? • what is the baudrate (and other communication settings)?

1 FX3U Series Programmable Controllers User’s Manual - MODBUS Serial Communication Edition FX3U Series Programmable Controllers User's Manual [MODBUS Serial. Abbreviation for MELSEC communication Protocol. This protocol is used to access MC protocol supporting m odules, such as the serial communication module and Ethernet.

• how is the header of the command built up? • how is the command itself built up? • how is the checksum calculated? (It doesn't matter in which coding language or just a protocol manual). I found the required documentation The default communication settings are a baudrate of 9600, even parity, 7 data bits, 1 stop bit, and no checksum I changed this to a baudrate of 19200, none parity, 8 data bits, 1 stop bit, and checksum turned on: A small VB6 project: '1 form with: ' 1 mscomm control: name=comFX ' 1 command button: name=cmdSend ' 1 textbox: name=txtShow multiline=true Option Explicit Private Declare Function GetTickCount Lib 'kernel32' () As Long Private mstrData As String Private mblnBusy As Boolean Private Sub Form_Load() With App Caption =.Title & ' ' & CStr(.Major) & '.' & CStr(.Minor) & '.'