Modbus serial Profibus brick function code 70

已回答

Erik Van Hamme

• 2024年06月28日 09:54

Hi, I am using the CompactComm AnyBus brick for profibus, the Modbus serial variant.

I have my RTU communication operational, I can read the correct Module type and network type from the registers.

I am now attempting to read the configured Profibus Node address using function code 70. This node address is in network object 0x04, instance 1 at attribute 5. I have trouble constructing the Modbus request to retrieve this information. The Brick keeps sending me an exception code back for illegal_data_value.

Would it be possible to point me to additional documentation regarding the function code 70? What is in the "Anybus® CompactCom™ B40 Modbus Serial PROFIBUS Network Guide" is quite sparse. The document has an example to write virtual attributes, but nothing showing how I should read attributes from other objects.

Thanks in advance.

0

• 

  ALK

  • 2024年07月04日 13:45

  Hello Erik,

  I am sorry for the late reply.

  I will need to verify this on a Modbus Serial test setup, which I will have access to no sooner than upcoming Monday.

  In the meantime, would you be able to open a ticket in our support portal describing your issue and maybe add your Modbus telegram that you tried until now? 

  Thank you.

  0
• 

  Erik Van Hamme

  • 2024年07月04日 13:49

  I have managed to set the Node address via another way.

  Thank you for the offer of assistance, but I am good for now. ;)

  0

请先登录再写评论。