Register Definitions - GE PanaFlow MV80 User Manual

Chapter 4. Serial Communications
4.2.6f

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 of the Output Menu "Modbus
Units" item. The display units strings (see Table 8 below) 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 "Modbus Order" on page 86) is set to 0-1:2-3 or 2-3:0-1, then the characters are transmitted
in the correct order; if it is 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 Volume flow
30005-30006
30001-30002 Temperature
30029-30030
30015-30016
30013-30014
30031-30032 Reynolds number
30025-30026 Vortex frequency
34532
30085-30086 Vortex amplitude
30027-30028 Filter setting
88
Table 8: Display Units Strings
Variable Data Type
unsigned long
Totalizer unsigned long
Mass flow
Pressure
Velocity
Density
Viscosity
Gain
Units
--
display units*
string --
float display units*
float display units*
float display units*
float display units*
float ft/sec
float display units*
float cP
float --
float Hz
char --
float Vrms
float Hz
Function Code Addresses
03, 04
03, 04 524-525
03, 04 2036-2041
03, 04
03, 04
03, 04
03, 04
03, 04
03, 04
03, 04
03, 04
03, 04
03, 04
03, 04
03, 04
PanaFlow™ MV80 & MV82 User's Manual
8-9
6-7
4-5
0-1
28-29
14-15
12-13
30-31
24-25
4531
84-85
26-27