Modbus Address of Analog Expansion Module : io AI4 Ao2

[dominic.irl]

Hi all,

 

I am looking for the input/output modbus address range of the expansion module "io ai 4 ao 2" for the V430.

How do I go about finding these digits?

 

Thanks in advance.

 

D

[s.pratt]

Hello D,

 

Are you trying to retrieve the values via the expansion adapter or via the PLC?  The I/O points are written to an operand of your choice, so it will be the operand you are reading/writing, and not the I/O module directly.  You choose the operand when you link the I/O point through the HW Configuration.

 

If you trying to read/write to the addresses through the expansion adapter, this can only be done with an EX-RC1.

 

The slave address table can be found in the help files: Communications> Communication FBs> MODBUS> Slave Addressing.  The V430 uses the Enhanced Series table, and the EX-RC1 uses the Standard Series table.  You will see these links in green lettering on the Slave Addressing file page.

 

Hope this helps.