Omron CS1W-MCH71 -, Руководство по эксплуатации

Страница: 711 / 717

666
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