JohnStudio

Can I write modbus rtu over RS-232 interface of the CPU module Q01UCPU

3 posts in this topic

Hi, First as i know we can communication in MODBUS RTU as summary below

1.FX series, FX3U-485ADP-MB + ADPRW instruction 

2.Q series, QJ71C24 <Serial interface module>+ Pre-defined protocol 

3.Q series, QJ71MB91<Modbus interface module

Three thing upper, i think it will ok

 

The question is  1> FX series, Cloud we use < Serial communication only not Modbus adapter> + RS instruction to do Modbus and How to do that.

                             2>Can I write modbus rtu over RS-232 interface of the CPU module Q01UCPU and how

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8 hours ago, JohnStudio said:

Hi, First as i know we can communication in MODBUS RTU as summary below

1.FX series, FX3U-485ADP-MB + ADPRW instruction 

2.Q series, QJ71C24 <Serial interface module>+ Pre-defined protocol 

3.Q series, QJ71MB91<Modbus interface module

Three thing upper, i think it will ok

 

The question is  1> FX series, Cloud we use < Serial communication only not Modbus adapter> + RS instruction to do Modbus and How to do that.

                             2>Can I write modbus rtu over RS-232 interface of the CPU module Q01UCPU and how

1> You can use RS/RS2 to communicate device but you need to create send MODBUS data frame manually.

2> No, Q Series built-in RS-232 don't have any instruction that can use.

For FXCPU please check this manual about how to use RS/RS2 Instructions

https://electrobit.ee/web/file_bank/Manuals/kontrollerid/mitsubishi/fx-series/FX1S-FX1N-FX2N(C)-FX3U-communication-users-manual_ENG_ver_C.pdf

Edited by Wasan

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@Wasan I will do as you recommend and i will show you a test result

hope someday i can help you 

thank you for your kindness and support

harrystudioplc@gmail.com
 

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