Vega VEGAPULS C 21 Instrucciones De Servicio página 48

14 Anexo
Register Name Register Number
TV 2106
QV 2108
Status 2200
PV 2202
SV 2204
TV 2206
QV 2208
Unit Codes for Register 104, 108, 112, 116
Unit Code
32
33
40
41
42
43
44
45
46
47
48
49
111
112
113
14.4 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.
Parámetro
Request: Function Code
Start Address
Number of Registers
48
Type
DWord
DWord
DWord
DWord
DWord
DWord
DWord
Measurement Unit
Degree Celsius
Degree Fahrenheit
US Gallon
Liters
Imperial Gallons
Cubic Meters
Feet
Meters
Barrels
Inches
Centimeters
Millimeters
Cubic Yards
Cubic Feet
Cubic Inches
Note
Third Variable in Byte Order ABCD DCBA (Little Endian)
Quarternary Variable in Byte Order DCBA (Little Endian)
See Register 100
Primary Variable in Byte Order BACD (Middle Endian)
Secondary Variable in Byte Order BACD (Middle Endian)
Third Variable in Byte Order BACD (Middle Endian)
Quarternary Variable in Byte Order BACD (Middle Endian)
Length Code/Data
1 Byte 0x03
2 Bytes 0x0000 to 0xFFFF
2 Bytes 1 to 127 (0x7D)
VEGAPULS C 21 • Protocolo Modbus y Levelmaster