Description

This interface should be used when ibaPDA is connected to a Modbus network via a serial interface (COM port).

ibaPDA supports the Modbus modes master and slave as well as RTU and ASCII.
Interface configuration

First, you should add a Modbus COM port (serial interface) . Select the Modbus Serial node in the interface tree and click on the <Add Modbus COM port> button.

Then, set up the COM port properties and click on the <Apply> button.

  • Active Check this option if you want to use the interface.

  • COM port Select a COM port from the drop-down list.

  • Baud rate, parity, data bits and stop bits Set up these COM port parameters in compliance with the Modbus network.

  • Modbus mode Choose whether ibaPDA should work in RTU or ASCII mode or as master or slave.

  • RTU framing Choose whether RTU framing should be done automatically (recommended) or manually. If you choose manually, specify an appropriate framing time.
Status display for Modbus slaves

Once the <Apply> button in the properties area has been clicked, ibaPDA starts working on the COM port.

  • When running in slave mode, ibaPDA monitors the COM port for messages.

  • When running in master mode, ibaPDA sends requests to the configured Modbus slaves at regular intervals.

If active Modbus slaves are connected, the status of the possible 247 Modbus devices is indicated by different colors.

Status

Master mode

Slave mode

Connected (green)

The slave responds to the periodic requests from ibaPDA.

The master is sending periodic requests to ibaPDA.

Disconnected (red)

The slave does not respond to periodic requests from ibaPDA.

The master does not send any requests to this slave.

Disabled (gray)

This slave is not configured.

This slave is not configured.
Available modules

  • Modbus: slave
Product name

ibaPDA-Interface-Modbus-Serial (Art. no. 31.001021)