Figure 3 sample application program, Trusted, Process control algorithms t8019 – Rockwell Automation T8019 Trusted Process Control Algorithm Software Package User Manual
Page 21
Trusted
TM
Process Control Algorithms T8019
Issue 8 Sep 07
PD-T8019
21
Example:
T_AVG
OUT
PV
250ms
20ms
T (ms)
350
390
432
475
521
565
607
650
690
732
777
821
PV
23.5 15.46
10.01
56.03
58.61
90.17
85.68 84.56
18.09
95.94
75.66
49.38
Ts (ms)
46
40
42
43
46
44
42
43
40
42
45
44
% of Tp
103.2 102.4
101.6
102.8
102.8
104.4
102.8 104.0
103.2
102.8
102.4
102.4
OUT
23.50 22.87
21.09
22.71
28.76
37.26
48.00 58.53
64.87
68.91
73.96
71.92
Table 3 Example Time Average
The example assumes that PV has been static at 23.5 for greater than 250 ms before the first sample
shown. The Ts row shows the actual interval between samples. The % of Tp row shows the figure
used for the overall output adjustment; e.g., the actual period between the 521ms and 777ms iterations
is 256ms, i.e. 102.4% of Tp.