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M251 Modbus server fc4

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Cadet

M251 Modbus server fc4

Hi, 

can be set, to make the modbus server respond to function 4 (read input register ) ?

 

Thanks.

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Administrator

Re: M251 Modbus server fc4

@AmeliaFaraci : Could you help?

Rodrigo G. 


Industrial Automation Community manager

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Crewman

Re: M251 Modbus server fc4

Hi @Jeneburg ,

 

If you take a look in the page 104 of the "Modicon M251 - Logic Controller - Programming Guide" :

https://download.schneider-electric.com/files?p_enDocType=User+guide&p_File_Name=EIO0000003089.02.pd...

 

If I am not wrong based on the document the FC4 is not supported for Modbus TCP Server but if the client uses FC3 you can move the %IW to %MW in the controller.

 

I hope this helps you.

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