Instruction manual Operation
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8.9.2 Modbus connections
A lead is provided for the Modbus connections that plugs into the electronics assembly near
the power cable entry. The Brown is the -ve bus wire and the Black is the +ve bus wire. Both
White wires go to ground.
For reliable operation of a Modbus network the cable type and installation must comply with
requirements in the Modbus specification document “MODBUS over Serial Line Specification
& Implementation guide V1.0”.
9 Operation
9.1 Entering the pipe inside diameter
Switch on the U1000 V2 for the first time.
The GF start screen is displayed for 5 s.
The hundreds digit (050.0) for the pipe inside diameter flashes.
Press the button.
The flashing hundreds digit (050.0) increases from 0 to 1.
Press the button.
The flashing hundreds digit (050.0) decreases from 1 to 0.
Press the button.
The tens digit (050.0) flashes.
Press the button.
The flashing tens digit (050,0) increases through the number sequence 0, 1, 2,
3, 4, 5, 6, 7, 8, 9 ,0.