Modbus

Description

Modbus is a serial communication protocol tied to a known IP address. It holds several input/output registers.

 
To access Modbus

  1. Tap + Add Source under the Modbus tree, and the communication screen shows the Modbus: Source.

  2. Tap the IP address field to edit and Confirm.

  3. Check the Sequential mode checkbox to force the Modbus client to wait for a response before sending the next request.

  4. Tap + Add Signal, and a screen appears with these editable fields:

    • Signal Name

    • Address From

    • Address To

    • Signal Type

    • Frequency

    • Timeout

    • Slave Address
 

  1. In the Signal Name field, you can edit and Confirm.

  2. Check the Address Range checkbox to activate Address To field.

  3. Enter the Address From and To respectively, and Confirm.

  1. Tap the Signal Type field, and five choices are available:

    • Read Digital Inputs

    • Read Input Registers

    • Read Holding Registers

    • Write Digital Outputs

    • Write Output Registers

  2. Choose the pertinent signal type.

  3. Tap the Frequency field and choose the pertinent frequency.

  4. Tap the Timeout field, enter the value, and Confirm.

  5. On the Slave Address field, enter the value, and Confirm.

  6. To finish, tap Add on the right bottom part of Add Signal screen.