Hach 911 User Manual page 96

SCADA-Modbus® System Guidelines
Table 15 Channels' Units of Measure Read Holding Register Addresses
Name
Temperature
Rainfall
pH (or ORP)
Level 1
Velocity 1
Channel 1
Channel 2
Channel 3
Channel 4 (D.O.)
Channel 5 (D.O. Temp.)
Channel 6 (Conductivity)
Channel 7 (Cond. Temp.)
Level 2
Velocity 2
Flow 1
1
The addresses shown above return a code that represents the appropriate unit of measure.
Name
Total Flow 1
Total Flow Units
Total Flow Multiplier
Unit
ML
AF
CF
GAL
L
M3
IN
CM
FT
M
CM2
FT2
IN2
M2
AFD
CFS
94
Type Size (bits)
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Integer 16
Table 16 Flow Totalizer Read Holding Register Addresses
Type Size (bits)
Float 32
Integer 16
Float 32
Table 17 SCADA-Modbus Units of Measure Codes
Code
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Start Address
# of Registers
Hi
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
1 00
Start Address
# of Registers
Hi
2 00
1 00
2 00
Unit
GPH
LPS
LPM
LPH
MGD
PH
ORP
PPM
PPB
MGL
PCTSAT
MSIEMENS
MICROSIEMENS
GRAMSPERKG
PCTPERDEGC
DEGREE_C
1
Start Address
Registers
Lo
31 40050
32 40051
33 40052
34 40053
35 40054
36 40055
37 40056
38 40057
39 40058
3A 40059
3B 40060
3C 40061
3C 40061
3E 40063
41 40066
Start Address
Registers
Lo
4A 40075-40076
50 40081
51 40083-40084
Code
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41