User guide

Diagnostics – Modbus RTU Slave
Select the Modbus RTU Slave in the dropdown menu on the Diagnostic page. Additional diagnostic
information can be found by clicking on the Help button.
Clear All Values - This will only affect Displayed Values.
1. This will return all values displayed to 0 and clear the status string.
2. If Viewing Modbus RTU Slave, this will only clear the values for the Modbus RTU Slave section of the
gateway.
Device Status
1. Connected - A Modbus RTU Master has a connection for the gateway.
2. Not Connected:
a. The Modbus RTU Master has not opened up communication to the gateway.
b. The Modbus RTU Master has not communicated to the gateway in “x” milliseconds, where
“x” is the inactivity timeout specified in the Modbus RTU Slave Configuration.
3. Fatal Error: Hardware Port Not Configured:
a. Hardware Port not configured in the Port Configuration web page.
b. Hardware Port selected in the Modbus RTU Slave configuration page doesn’t match the port
configured.
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