Why am I getting an error: "specified address is invalid" on a Magelis HMI (or Vijeo Designer HMI Simulation) communicating with an EcoStruxure Control Expert / Unity Pro PLC Simulator via Modbus TCP?
Configuration software on Windows PC
Vijeo Designer, EcoStruxure Control Expert (Unity Pro v6.0+)
The simulated PLC in EcoStruxure Control Expert / Unity Pro does support sharing the data from physical input and output addressed as Topological IO Modbus Device Addresses (%Ix.y.z, %Qx.y.z, %IWx.y.z, %QWx.y.z where x is the Rack number, y is the Slot number, and z is the Channel of the IO module) to HMI requesting reads via Modbus TCP protocol.
To resolve the error message you will need to do one of two things:
- Connect the HMI Vijeo Designer simulator to a real physical PLC.
- Instead of using Topological Addressing, restructure your PLC application to use Unlocated Variables (IODDTs associated with the individual Channels in your IO modules). Refer to documentation for .XVM export for EcoStruxure Control Expert / Unity Pro and Symbol Linking in Vijeo Designer.