Appendix a modbus register information – Hach-Lange 1720E Low Range Turbidimeter User Manual
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Appendix A Modbus Register Information
Table 8 Sensor Modbus Registers
Group Name
Tag Name
Register
#
Data
Type
Length
R/W
Units (U)
Range
Measurements
Cal Gain
40013
float
2
R
none
0.5 to 2.0
Verification
PF Criteria
40062
Integer
1
R/W
%
5 to 10
Measurements
Turbidity
40001
Float
2
R
NTU
0/100
Diagnostics
Temperature
40005
Float
2
R
Deg C
—
Diagnostics
Dark Reading
40009
Float
2
R
NTU
0/100
Diagnostics
Raw Turbidity
40011
Float
2
R
NTU
0/100
Diagnostics
Lamp Voltage
40018
Float
2
R
Volts
0/5
Diagnostics
Lamp Current
40020
Float
2
R
Amps
0/2.75
Diagnostics
Plus 5V
40022
Float
2
R
Volts
0/5.5
Diagnostics
Voltage In
40024
Float
2
R
Volts
0/1443
Setup
Software Version
40015
Float
2
R
—
—
Setup
Bubble Rej
40017
Integer
1
R/W
—
On/Off
Setup
DataLog Interval
40026
Integer
1
R/W
Sec or Min
30 sec, 1 min,
5 min, 10 min,
15 min
Setup
Sensor Name
40027
String
6
R/W
—
—
Setup
Filter Size
40033
Integer
1
R/W
sec
no averaging,
6, 30, 60, 90
Setup
Sensor Ser Num
40036
String
6
R
—
12 digits
Setup
Output Mode
40042
Integer
1
R
—
0, 1, 2, 4
Setup
Set Resolution
40061
Integer
1
R/W
decimal places
4, 3, or 2