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Performance
Appendix A
Example: If the unit cycle time calculated under
Calculation Method for Unit Cycle
is 4 ms (*1) and the commu-
nications cycle time calculated under
Calculation Method for Communications Cycle
is 3 ms (*2), the MC Unit
processing time, which combines the unit cycle time and communications cycle time, would be 4 ms:4 ms (*3).
Calculation Method for the Counter Latch Startup Time
Basic formula for calculating the counter latch startup time is shown below:
1. When Latch Starting and Target Positions Are Specified
When Unit Cycle = 1 ms or 2 ms:
[(20 ms/Tm)
×
5 + 5]
×
Tm + Ts
×
3 + 4 ms to [(20 ms/Tm)
×
6 + 5]
×
Tm + Ts
×
3 + 4 ms
When Unit Cycle = 3 ms, 4 ms, 6 ms, or 8 ms:
[(20 ms/Tm)
×
7 + 5]
×
Tm + Ts
×
3 + 4 ms to [(20 ms/Tm)
×
8 + 5]
×
Tm + Ts
×
3 + 4 ms
Note
Round up the figures below the decimal place of the value found by calculations.
According to the calculation methods above, the counter latch startup time will be as follows:
• Unit Cycle = 1 ms: Communication Cycle = 1 ms
112 ms to 132 ms
• Unit Cycle = 2 ms: Communication Cycle = 1 ms
117 ms to 137 ms
• Unit Cycle = 2 ms: Communication Cycle = 2 ms
120 ms to 140 ms
• Unit Cycle = 3 ms: Communication Cycle = 3 ms
175 ms to 196 ms
• Unit Cycle = 4 ms: Communication Cycle = 2 ms
170 ms to 190 ms
• Unit Cycle = 4 ms: Communication Cycle = 4 ms
176 ms to 196 ms
• Unit Cycle = 6 ms: Communication Cycle = 3 ms
211 ms to 235 ms
• Unit Cycle = 8 ms: Communication Cycle = 4 ms
224 ms to 248 ms
• Unit Cycle = 8 ms: Communication Cycle = 8 ms
236 ms to 260 ms
2. When Latch Starting and Target Positions Are Not Specified
Tm
×
3 + Ts
×
3 + 4 ms
Note
Round up the figures below the decimal place of the value found by calculations.
According to the calculation methods above, the counter latch startup time will be as follows:
• Unit Cycle = 1 ms: Communication Cycle = 1 ms
10 ms
• Unit Cycle = 2 ms: Communication Cycle = 1 ms
13 ms
• Unit Cycle = 2 ms: Communication Cycle = 2 ms
16 ms
• Unit Cycle = 3 ms: Communication Cycle = 3 ms
22 ms
• Unit Cycle = 4 ms: Communication Cycle = 2 ms
22 ms
• Unit Cycle = 4 ms: Communication Cycle = 4 ms
28 ms
• Unit Cycle = 6 ms: Communication Cycle = 3 ms
31 ms
• Unit Cycle = 8 ms: Communication Cycle = 4 ms
40 ms
3 ms
*2
3 ms:3 ms
3 ms:3 ms
3 ms:3 ms
4 ms:4 ms
*3
6 ms:3 ms
8 ms:4 ms
4 ms
4 ms:4 ms
4 ms:4 ms
4 ms:4 ms
4 ms:4 ms
8 ms:4 ms
8 ms:4 ms
Communica-
tions cycle
Unit cycle
1 ms
2 ms
3 ms
4 ms
*1
6 ms
8 ms
Содержание CS1W-MCH71 -
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