Hi James,
Thanks a lot for replying. I do have the DSC module. I 'm a bit confused as regards how it all fits together.
What I have done previously was to use the 'Modbus library' functions & write out an app for conencting to the PLC's. This works fine though I have the task ( cumbersome ) of defining the Modbus commands, length of registers to be read etc & then use a shift register approach to switch between the MOdbus commands.
What I was hoping for in the Modbus I/O server was to be able to define all this during the creation of the I/O server & be absolved of it all later on. This is typically what you do when using other SCADA systems. I'm sure this will work with LV as well but can't seem to peice it together.
Many thanks.