Communications Options User’s Guide
17
Chapter 1. Modbus Communications
Table 7: Modbus Registers for the Sentinel LCT or Sentinel LNG Flowmeter
Category Measurement
Typ
e
Size Format
Composite
Register
Address
Channel 1
Register
Address
Channel 2
Register
Address
Channel 3
Register
Address
Channel 4
Register
Address
Primary
Measuran
d
Velocity
F
2 LSW float
1 0x0000
1025 0x0400 2049 0x0800 3073 0x0C00 4097 0x1000
Volumetric
F
2 LSW float
3 0x0002
1027 0x0402 2051 0x0802 3075 0x0C02 4099 0x1002
Std Volumetric F
2 LSW float
5 0x0004
1029 0x0404 2053 0x0804 3077 0x0C04 4101 0x1004
Mass Flow
F
2 LSW float
7 0x0006
1031 0x0406 2055 0x0806 3079 0x0C06 4103 0x1006
Energy Rate
F
2 LSW float
9 0x0008
1033 0x0408 2057 0x0808 3081 0x0C08 4105 0x1008
Transit
Time
Soundspeed
F
2 LSW float
11 0x000A 1035 0x040A 2059 0x080A 3083 0x0C0A 4107 0x100A
Up Transit
F
2 LSW float
13 0x000C 1037 0x040C 2061 0x080C
3085
4109 0x100C
Dn Transit
F
2 LSW float
15 0x000E 1039 0x040E 2063 0x080E 3087 0x0C0E 4111 0x100E
DeltaT
F
2 LSW float
17 0x0010
1041 0x0410 2065 0x0810 3089 0x0C10 4113 0x1010
Receiver
Diagnostic
s
UP Sig Strength F
2 LSW float
19 0x0012
1043 0x0412 2067 0x0812 3091 0x0C12
4115 0x1012
DN Sig
F
2 LSW float
21 0x0014
1045 0x0414 2069 0x0814 3093 0x0C14 4117 0x1014
Gain Up[dB]
F
2 LSW float
23 0x0016
1047 0x0416 2071 0x0816 3095 0x0C16 4119 0x1016
Gain Dn[dB]
F
2 LSW float
25 0x0018
1049 0x0418 2073 0x0818 3097 0x0C18 4121 0x1018
UP DAC
U
2 Unsigned
integer
27 0x001A
1051 0x041A 2075 0x081A 3099 0x0C1A 4123 0x101A
DN DAC
U
2 Unsigned
integer
29 0x001C 1053 0x041C 2077 0x081C 3101 0x0C1C 4125 0x101C
UP Amp
F
2 LSW float
31 0x001E
1055 0x041E 2079 0x081E 3103 0x0C1E
4127 0x101E
DN Amp
F
2 LSW float
33 0x0020 1057 0x0420 2081 0x0820 3105 0x0C20 4129 0x1020
Signal
Processing
Diagnosti
cs
PEAK%
F
2 LSW float
35 0x0022 1059 0x0422 2083 0x0822 3107 0x0C22 4131 0x1022
UP Signal Q
F
2 LSW float
37 0x0024 1061 0x0424 2085 0x0824 3109 0x0C24 4133 0x1024
DN Signal Q
F
2 LSW float
39 0x0026 1063 0x0426 2087 0x0826 3111 0x0C26 4135 0x1026
UP +– Peak
F
2 LSW float
41 0x0028 1065 0x0428 2089 0x0828 3113 0x0C28 4137 0x1028
DN +– Peak
F
2 LSW float
43 0x002A 1067 0x042A 2091 0x082A 3115 0x0C2A 4139 0x102A
UP Norm
F
2 LSW float 45 0x002C 1069 0x042C 2093 0x082C 3117 0x0C2C 4141 0x102C
DN Norm
Factor
Theta 3
CEE1
F
2 LSW float
47 0x002E
1071 0x042E 2095 0x082E 3119 0x0C2E 4143 0x102E
F
2 LSW float
49 0x0030 1073 0x0430 2097 0x0830 3121 0x0C30 4145 0x1030
F
2 LSW float
51 0x0032 1075 0x0432 2099 0x0832 3123 0x0C32 4147 0x1032
Correction
Factors
Reynolds #
F
2 LSW float
53 0x0034 1077 0x0434 2101 0x0834 3125 0x0C34 4149 0x1034
K(RE)
F
2 LSW float
55 0x0036 1079 0x0436 2103 0x0836 3127 0x0C36 4151 0x1036
CTL
1
F
2 LSW float
57 0x0038 1081 0x0438 2105 0x0838 3129 0x0C38 4153 0x1038
CPL
2
F
2 LSW float
59 0x003A 1083 0x043A 2107 0x083A 3131 0x0C3A 4155 0x103A
CTPL
3
F
2 LSW float
61 0x003C 1085 0x043C 2109 0x083C 3133 0x0C3C 4157 0x103C
1
Correction factor for the effect of Temperature on the Liquid.
2
Correction factor for the effect of Pressure on the Liquid.
3
Correction factor for the effects of Temperature and Pressure on the Liquid, a.k.a. “full VCF,” is product of CTL and
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