9.8.3 Industrial Protocols Troubleshooting
MODBUS Protocol
MODBUS protocol relies on the fundamental TCP/IP connectivity to establish connections and transport data. Once you have verified
Networking and TCP/IP connectivity, you should have little or no problems establishing a MODBUS connection.
iVu supports one MODBUS connection from a single client, and will reject additional connection requests.
Prior to attempting to establish the MODBUS connection, you will have to configure your device, and teach it about the iVu sensor. You
will have to tell it the IP address of the iVu sensor that you have previously configured. Configurations steps vary for each device, so you
will have to consult the appropriate manual for these steps.
If your device has user-configurable MODBUS port, please verify that it is set to port number 502. iVu will not accept connections on any
other port.
Once you have established a MODBUS connection, you can verify that iVu has accepted it by going to the System > Communications
> Industrial Ethernet > Status page, and viewing the connection status:
If you experience issues accessing data, please consult the relevant sections of the manual for the MODBUS register maps supported by
the sensor, and consult the Industrial Protocols Log. The log, when configured to Detailed Logging mode, provides record of individual
register access sequence, and records any errors:
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