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Tech Note 14-12

Status Modules and Flags “Station Status” modules can be added to GRIDlink IPm controller’s configuration in Toolkit. These virtual modules contain discrete inputs that reflect the communication health of remote I/O or Modbus devices in your system. Once I/O Transfer communication to a distributed station or module is successful, it’s corresponding Station Status discrete register will be set TRUE (1) and will remain that way. If subsequent I/O Transfer communication to the remote I/O or Modbus device fails, the corresponding Station status register will be set FALSE (0). By monitoring these registers, you can take appropriate action if a remote I/O or Modbus device goes offline. Note: remote I/O or Modbus devices will be reported in their last known state if communication is halted with a Scan Enable flag.