Programming Site Data 1-57
March 2008
Table 1-26: DF868 2-Channel MODBUS Registers
MODBUS
Reg # Description Units
Scaling
(decimal
places) Size in Bytes
1
1
Clear Totalizers
none 2 (16 bit signed)
2 CH 1 Velocity ft/s or m/s 2 4 (32 bit integer)
4 CH 1 Volumetric VOL_U -- 4 (IEEE 32 bit)
6 CH 1 +Totals TOT_U Register 10 4 (32 bit integer)
8 CH 1 -Totals TOT_U Register 10 4 (32 bit integer)
10 CH 1 #T Digits none 0 2 (16 bit integer)
11 CH 1 Totalizer Time sec 2 4 (32 bit integer)
13
2
CH 1 Error Value
none 0 2 (16 bit integer)
14 CH 1 SSUP none 1 4 (32 bit integer)
16 CH 1 SSDN none 1 4 (32 bit integer)
18 CH 1 SNDSP ft/s or m/s 0 4 (32 bit integer)
20 CH 2 Velocity ft/s or m/s 2 4 (32 bit integer)
22 CH 2 Volumetric VOL_U -- 4 (IEEE 32 bit)
24 CH 2 + Totals TOT_U Register 28 4 (32 bit integer)
26 CH 2 - Totals TOT_U Register 28 4 (32 bit integer)
28 CH 2 # T Digits none 0 2 (16 bit integer)
29 CH 2 Totalizer Time sec 2 4 (32 bit integer)
31
2
CH 2 Error Value
none 0 2 (16 bit integer)
32 CH 2 SSUP none 1 4 (32 bit integer)
34 CH 2 SSDN none 1 4 (32 bit integer)
36 CH 2 SNDSP ft/s or m/s 0 4 (32 bit integer)
38
3
AVG Velocity
ft/s or m/s 2 4 (32 bit integer)
40
3
AVG Volumetric
VOL_U -- 4 (IEEE 32 bit)
42
3
AVG + Totals
TOT_U Register 46 4 (32 bit integer)
44
3
AVG - Totals
TOT_U Register 46 4 (32 bit integer)
46 AVG #T Digits none 0 2 (16 bit integer)
47
3
AVG Totalizer Time
sec 2 4 (32 bit integer)
49
4
AVG Error Value
none 0 2 (16 bit integer)
50
3
AVG SSUP
none 1 4 (32 bit integer)
52
3
AVG SSDN
none 1 4 (32 bit integer)
54
3
AVG SNDSP
ft/s or m/s 0 4 (32 bit integer)
56 CH 1 Power Power_u -- 4 (IEEE 32 bit)
58 CH 1 +Energy Energy_u Register 62 4 (32 bit integer)
60 CH 1 -Energy Energy_u Register 62 4 (32 bit integer)
62 CH 1 # Energy Digits none 0 2 (16 bit integer)
63 CH 1 TempS °F or °C 2 4 (32 bit integer)