Automobile Parts - Air Flow Meter User Manual

Appendix E MODBUS Commands Series 24-HP Instruction Manual
E-4 IM-24-HP
gramming 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 charac-
ters 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 or-
der.
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 Vortex frequency float Hz 03, 04 24-25
34532 Gain char — 03, 04 4531
30085-30086 Vortex amplitude float Vrms 03, 04 84-85
30027-30028 Filter setting float Hz 03, 04 26-27
The following registers are available with the energy meter firm-
ware:
Registers Variable Data type Units Function
code
Addresses
30527-30528 Totalizer #2 unsigned long display units* 03, 04 526-527
32043-32048 Totalizer #2 units string — 03, 04 2042-2047
30003-30004 Temperature #2 float display units* 03, 04 2-3
30011-30012 Energy flow float display units* 03, 04 10-11