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Fx3U-128MT - modbus RTU - Holding Registers

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I'm trying to set up Modbus RTU communication between FX3U PLC and a weigh module.

I would use the ADPRW command using 0X03 to read the 16 bit Holding Register but in the weigh module the Data Address/Holding Register of the value I want to get is 400047 - 400048.

How to translate the value in 16 bit?




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1 hour ago, fabio_fabio said:

@ Neverov, 

Я не понимаю. 


Стр. 27. У    меня есть адрес данных, по которому можно прочитать значения с ведомого устройства.

Адрес нужного мне значения - 6 цифр. Вы предлагаете сбросить один ноль, а затем преобразовать его из шестнадцатеричного в двоичный?

Sorry I didn't one zero.
Drop 4.
Look at registers 46-49.

If you are reading DWORD register. It happens that LOW WORD and High WORD are reversed.

An example from the manual on INVERTER FR-A800


p.s. Sorry, but the site still does not allow image attachments.

Edited by Neverov

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