VEGA VEGABAR 83 Modbus and Levelmaster protocol - Operating Instructions - Manuel (Page 73)

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10 Annexe
VEGABAR 83 • Protocole Modbus et Levelmaster
46295-FR-131120
Register Name Register Number Type Note
PV 2202 DWord Primary Variable in Byte Order BACD (Middle Endian)
SV 2204 DWord Secondary Variable in Byte Order BACD (Middle En-
dian)
TV 2206 DWord Third Variable in Byte Order BACD (Middle Endian)
QV 2208 DWord Quarternary Variable in Byte Order BACD (Middle En-
dian)
Unit Codes for Register 104, 108, 112, 116
Unit Code Measurement Unit
32 Degree Celsius
33 Degree Fahrenheit
40 US Gallon
41 Liters
42 Imperial Gallons
43 Cubic Meters
44 Feet
45 Meters
46 Barrels
47 Inches
48 Centimeters
49 Millimeters
111 Cubic Yards
112 Cubic Feet
113 Cubic Inches
10.4 Instructions RTU Modbus
FC3 Read Holding Register
Cette instruction permet de lire un nombre quelconque (1-127) de registres "holding". Le registre de
démarrage à partir duquel la lecture doit être effectuée et le nombre de registres sont transférés.
Request:
Parameter Length Code/Data
Function Code 1 Byte 0x03
Start Address 2 Bytes 0x0000 to 0xFFFF
Number of Registers 2 Bytes 1 to 127 (0x7D)
Response:
Paramètres Longueur Code/Data
Function Code 1 Byte 0x03