471
The output refreshing time would be as follows for the five 16-point Output
Units and six 32-point Output Units controlled by the PC:
16 points
(16 points x 5) + (32 points x 6)
x 7 µs = 0.12 ms
The input refresh time would be as follows for the five 16-point Input Units
and five 32-point Input Units controlled by the PC:
16 points
(16 points x 5) + (32 points x 5)
x 8 µs = 0.12 ms
The cycle time would thus be:
0.5 ms + 6.0 ms + 0.12 ms + 0.12 ms 6.74 ms
Calculating Cycle Time Section 6-3
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