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9.2 System Switching Time
9
PROCESSING TIME FOR REDUNDANT SYSTEMS
(1) Tracking Data Reflection Time (Trc)
The reflection time for tracking data is calculated as shown below.
Z: Number of Program Steps
* 1: X1 to X3 are calculated as follows.
•X1:Processing time according to number of device points for tracking settings
X1=(D1 K1) + (D2 K2) + (D3 K3) + (D4 K4) [ms]
•X2:Processing time according to number of device ranges for tracking settings
X2=(E1 K5) + (E2 K6) + (E3 K7) + (E4 K8) [ms]
•X3:Processing time according to number of tracking blocks for tracking settings
X3=(F1 K9) + (F2 K10) + (F3 K11) [ms]
D1 to D4, E1 to E4, F1 to F3, and K1 to K11 are values used in Table9.6
Trc = 1 + Trc1 + Trc2 + Trc3 + Trc4 (ms)
Trc
Trc1 to Trc4
: Tracking data preparation time
: Processing time for transfer data shown in
Tab le 9 .5
Table9.5 Processing Times of Tra1 to Tra4
Transfer Data Processing Time (ms)
Trc1 Signal Flow Memory
Setting time for redundant
parameter tracking settings
1+0.13 10
-3
Z
Trc2 SFC Information SFC program execution time 1(Fixed)
Trc3 PID Control Instructions
PIDINIT instruction execution
time
0.5 (Fixed)
S.PIDINIT instruction
execution time
0.5 (Fixed)
Trc4 Device Data –
X1 + X2 + X3
*1
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