Omron Sysmac CS1 Operation Manual page 134

Cycle Time
Cycle Time and
Operation
Cycle time
10 ms or longer
20 ms or longer
50 ms or longer
100 ms or longer
Cycle Time Example
Process
Overseeing
Program execution
Cycle time calculation
I/O refresh in Customizable
Counter Unit
Peripheral servicing
Cycle time
114
The effects of the cycle time on Customizable Counter Unit operation are as
listed below.
CYCLE TIME OVER detected and SR 23509 turns ON. TIMH will not time accurately.
Programming using the 0.02-second Clock Bit (SR 25401) may be inaccurate.
Fatal error occurs if the cycle time monitoring time in DM 6618 is set to 50 ms (default).
Fatal error occurs if the cycle time monitoring time in DM 6618 is set to the maximum value.
Note User Setup Area word DM 6655 can be used to disable detection of CYCLE
TIME OVER error.
In this example, the cycle time is calculated for a Customizable Counter Unit.
The conditions are as follows:
The operating conditions are as follows:
Model:
User's program: 2,000 instructions (consisting of LD and OUT instructions)
Cycle time:
Note The average processing time for a single instruction in the user's program is as-
sumed to be 0.8 µs.
The cycle times are as shown in the following table.
Calculation method
0.8 × 2000 (µs)
(1) + (2) + (3) + (4) + (5)
Note 1. The cycle time can be automatically read from a Programming Device.
2. The maximum and current cycle time are stored in AR 26 and AR 27.
3. The cycle time can vary with actual operating conditions and will not neces-
sarily agree precisely with the calculated value.
4. The cycle time will be a little longer when bits are force-set/reset.
Operation conditions
CS1W-HIO01
Variable (no minimum set)
Time with peripheral
device
0.016 ms
1.6 ms
0.033 ms
0.025 ms
0.2 ms
1.874 ms
Section 8-3
When Peripheral
Connection Switch is OFF
0.016 ms
1.6 ms
0.033 ms
0.025 ms
0.003 ms
1.677 ms