VEGA VEGABAR 82 Modbus and Levelmaster protocol - Operating Instructions - Manual (Página 73)

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10 Anexo
VEGABAR 82 • Protocolo Modbus y Levelmaster
46294-ES-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 Modbus instrucciones RTU
FC3 Read Holding Register
Con esa instrucción se puede leer una cantidad arbitraria (1-127) en los registros holding. Se trans-
miten el registro inicial, desde el que hay que leer y la cantidad de registros.
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:
Parámetro Longitud Code/Data
Function Code 1 Byte 0x03