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The Modbus State Change Rule is configured as follows:

1. Go to the States tab (1) on the Modbus Rule object settings panel.
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2. In the Min. value (2) and Max. value (3) columns, specify the register value range for which this condition will apply.
3. In the Mode column (4), select the action which will happen when the register takes on the value from the specified range:
   • Off - Not use—no action.
   • State - State—channel state change on the map.
   • Event - Event—event generation.
   • Both - state Both—state change and event generation. 
4. In the Event text column (5), enter the message which will be received when the register takes on the value from the specified range.
5. Click the Apply button (6) to save the changes.

The Modbus State Change Rule is now configured.