Spirax Sarco RIM20, Инструкция по установке и обслуживанию, Страница: 85 / 132

IM-P198-05 MI Issue 2 85
5.6 Register definitions
The meter serial number and those variables that are commonly monitored (mass, volume
and energy flowrates, 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 flowrate, 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 Variable Data type Units
Function
code
Addresses
65100-65101 Serial number unsigned long — 03, 04
30525-30526 Totalizer unsigned long
display
units*
03, 04 524-525
32037-32042 Totalizer units string — 03, 04 2036-2041
30009-30010 Mass flow float
display
units*
03, 04 8-9
30007-30008 Volume flow float
display
units*
03, 04 6-7
30005-30006 Pressure float
display
units*
03, 04 4-5
30001-30002 Temperature float
display
units*
03, 04 0-1
30029-30030 Velocity float ft/sec 03, 04 28-29
30015-30016 Density float
display
units*
03, 04 14-15
30013-30014 Viscosity float cP 03, 04 12-13
30031-30032 Reynolds number float — 03, 04 30-31
30025-30026 Turbine frequency float Hz 03, 04 24-25
34532 Gain char — 03, 04 4531
30085-30086 Turbine amplitude float Vrms 03, 04 84-85
30027-30028 Filter setting float Hz 03, 04 26-27