72-901-04 Rev A 8/12/2019
Page 16 of 24
Digital Input States
The states of the digital inputs are presented to the Modbus master /client as input
registers in the form of bit fields. Digital input state indicators are binary, meaning
they have two states. A “0” indicates the input is inactive while a “1” indicates the
input is active.
The following registers are accessible on all models. However, the content of these
registers is model dependent. The user must interpret the content of these
registers within the context of the model and the associated hardware.
Bit 0 = P1 (Flow Switch)
Bit 1 = P2 (Drum Level 1)
Bit 2 = P3 (Drum Level 2)
Bit 3 = P4 (Drum Level 4)
Bit 4 = P5 (Water Meter 1)
Bit 5 = P6 (Water Meter 2)
Bit 6 = P7 (Water Meter 3)
Bit 7 = P8 (Water Meter 4)
Bit 8 = P9 (Water Meter 5)
Bit 9 = P10 (Water Meter
6)
Bit 10 = N/A
Bit 11 = N/A
Bit 12 = N/A
Bit 13 = N/A
Bit 14 = N/A
Bit 15 = N/A