Quickstart Guide
Industrial Systems Connection ...

Modbus

1min

Note: By default, the Modbus drivers monitor holding address 0 for connection status. If the Modbus device does not have holding address 0, then it will not show the "connected" status. You will still be able to read data from the device.

Here are the major differences for the Modbus drivers:

Driver

Use

Enron Modbus

Serial connection or TCP connection to a Modbus device

Serial connection to a device using Modbus ASCII

  • Serial connection to a device using Modbus RTU
  • The Gen2 driver has an option for zero-based addressing and therefore replaces both Gen1 RTU drivers.

TCP connection to a Modbus server which has one or more Modbus RTU connections

  • TCP connection to a Modbus device.
  • The Gen2 driver has an option for zero-based addressing and therefore replaces both Gen1 TCP drivers.

UDP connection to a Modbus device