72-901-04 Rev A
8/12/2019
Page 11 of 24
Alarms
Alarms are presented to the Modbus master /client as input registers in the form of
bit fields. Alarm indicators are binary, meaning they have two states. A “0”
indicates the alarm is inactive while a “1” indicates the alarm 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 – See
appendix A.
Modbus Name
Start
Address
End
Address
Data
Type
Details
Mstr Alarm Bit
Field 1
30105
30105
UINT16
Bit 0 = Flow Switch
Alarm
Bit 1 = Drum Level 1
Alarm
Bit 2 = Drum Level 2
Alarm
Bit 3 = Drum Level 3
Alarm
Bit 4 = Cond. High Alarm
Bit 5 = Cond. Low Alarm
Bit 6 = Cond. Limit Alarm
Bit 7 = Cond. Prb Err
Bit 8 = pH High Alarm
Bit 9 = pH Low Alarm
Bit 10 = pH Limit Alarm
Bit 11 = pH Prb Err
Bit 12 = ORP High Alarm
Bit 13 = ORP Low Alarm
Bit 14 = ORP Limit Alarm
Bit 15 = ORP Prb Err
Modbus Name
Start
Address
End
Address
Data
Type
Details
Mstr Alarm Bit
Field 2
30106
30106
UINT16
Bit 0 = T1 Limit Alarm
Bit 1 = T1 High Alarm
Bit 2 = T1 Low Alarm
Bit 3 = T2 Limit Alarm
Bit 4 = T2 High Alarm
Bit 5 = T2 Low Alarm
Bit 6 = T3 Limit Alarm
Bit 7 = T3 High Alarm