Definiciones De Los Registros - Spirax Sarco VLM20 Instrucciones De Instalación Y Mantenimiento

5.6 Register definitions
The meter serial number and those variables that are commonly monitored (mass, volume
and energy flow rates, total, pressure, temperature, density, viscosity, Reynolds number, and
diagnostic variables such as frequency, velocity, gain, amplitude and filter setting) are accessible
via the Modbus protocol. Long integer and floating point numbers are accessed as pairs of 16-bit
registers in the register order selected in the Modbus Order menu. Floating point numbers are
formatted as single precision IEEE 754 floating point values.
The flow rate, temperature, pressure, and density variables may be accessed as either the
flowmeter internal base units or in the user-programmed display units, which is determined by the
programming Output Menu's "Modbus Units" item. The display units strings may be examined by
accessing their associated registers. Each of these units string registers contain 2 characters of
the string, and the strings may be 2 to 12 characters in length with unused characters set to zero.
Note that the byte order affects the order in which the strings are transmitted. If the Modbus Order
menu (see page 2) is set to 0-1:2-3 or 2-3:0-1, then the characters are transmitted in the correct
order; if set to 1- 0:3-2 or 3-2:1-0, then each pair of characters will be transmitted in reverse order.
Registers
65100-65101 Serial number
30525-30526
32037-32042 Totalizer units
30009-30010
30007-30008
30005-30006
30001-30002
30029-30030
30015-30016
30013-30014
30031-30032 Reynolds number
30025-30026 Turbine frequency
34532
30085-30086 Turbine amplitude
30027-30028
IM-P339-06 MI Issue 2
Variable Data type
unsigned long
Totalizer unsigned long
Mass flow
Volume flow
Presión
Temperatura
Velocity
Densidad
Viscosidad
Gain
Filter setting
Units
—
display
units*
string —
display
float
units*
display
float
units*
display
float
units*
display
float
units*
float ft/sec
display
float
units*
float cP
float —
float Hz
char —
float Vrms
float Hz
Function
Addresses
code
03, 04
03, 04 524-525
03, 04 2036-2041
03, 04 8-9
03, 04 6-7
03, 04 4-5
03, 04 0-1
03, 04 28-29
03, 04 14-15
03, 04 12-13
03, 04 30-31
03, 04 24-25
03, 04 4531
03, 04 84-85
03, 04 26-27
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