Omron CS1W-MCH71 Operation Manual page 711

Performance
Communica-
tions cycle
1 ms
*2 3 ms:3 ms
3 ms
4 ms 4 ms:4 ms
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
• Unit Cycle = 2 ms: Communication Cycle = 1 ms
• Unit Cycle = 2 ms: Communication Cycle = 2 ms
• Unit Cycle = 3 ms: Communication Cycle = 3 ms
• Unit Cycle = 4 ms: Communication Cycle = 2 ms
• Unit Cycle = 4 ms: Communication Cycle = 4 ms
• Unit Cycle = 6 ms: Communication Cycle = 3 ms
• Unit Cycle = 8 ms: Communication Cycle = 4 ms
• Unit Cycle = 8 ms: Communication Cycle = 8 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
• Unit Cycle = 2 ms: Communication Cycle = 1 ms
• Unit Cycle = 2 ms: Communication Cycle = 2 ms
• Unit Cycle = 3 ms: Communication Cycle = 3 ms
• Unit Cycle = 4 ms: Communication Cycle = 2 ms
• Unit Cycle = 4 ms: Communication Cycle = 4 ms
• Unit Cycle = 6 ms: Communication Cycle = 3 ms
• Unit Cycle = 8 ms: Communication Cycle = 4 ms
666
2 ms 3 ms
3 ms:3 ms 3 ms:3 ms
4 ms:4 ms 4 ms:4 ms
Unit cycle
*1
4 ms
*3 6 ms:3 ms
4 ms:4 ms
4 ms:4 ms 8 ms:4 ms
112 ms to 132 ms
117 ms to 137 ms
120 ms to 140 ms
175 ms to 196 ms
170 ms to 190 ms
176 ms to 196 ms
211 ms to 235 ms
224 ms to 248 ms
236 ms to 260 ms
10 ms
13 ms
16 ms
22 ms
22 ms
28 ms
31 ms
40 ms
Appendix A
6 ms 8 ms
8 ms:4 ms
8 ms:4 ms