Using a Control Unit with the Serial MODBUS Gateway

You can find the associated offsets/registers in the Serial MODBUS ser Guide.

1. Set the Heartbeat of the Control Unit to the minimum amount of time that you can wait for the message to get from the gateway to the control unit.

• CFG_INTERVAL_ LINK: Offset 19 (This is the heartbeat)
• CFG_ INTERVAL_ STANDARD: Offset 20 (This is the aware state heartbeat) 

2. Set the default state of the relay to on or off.

• 0 = OFF
• 1 = ON

Write a 1 or 0 to the correct Offset for the relay you want to energize. CalVal1 is Relay 1 and CalVal2 is relay 2.

• CFG_INT_TYPE_CAL VAL_1_L: (Offset 33) = Relay One 
• CFG_INT_TYPE_ CALVAL_2_L: (Offset 35) = Relay Two

On the Control Unit's subsequent Heartbeat, the Control Unit's relay state will change.