Omron CJ - PROGRAMMING MANUAL 12-2009 - Cycle Time;High-Speed Processing; Minimum Cycle Time

263
Cycle Time/High-speed Processing Section 6-1
6-1 Cycle Time/High-speed Processing
The following functions are described in this section
• Minimum cycle time function
• Maximum cycle time function (watch cycle time)
• Cycle time monitoring
• Quick-response inputs
• Interrupt functions
• I/O refresh method
• Data background processing
6-1-1 Minimum Cycle Time
A minimum (or fixed) cycle time can be set in CS/CJ-series PLCs. (See note.)
Variations in I/O response times can be eliminated by repeating the program
with a fixed cycle time.
Note Indicates the cycle time for program execution when using a parallel
processing mode.
The minimum cycle time (1 to 32,000 ms) is specified in the PLC Setup in1-
ms units.
If the actual cycle time is longer than the minimum cycle time, the minimum
cycle time function will be ineffective and the cycle time will vary from cycle to
cycle.
PLC Setup
When using the CX-Programmer, make the settings on the Timings Tab Page.
Actual cycle time Actual cycle time Actual cycle time
Minimum cycle time
(Effective)
Minimum cycle time
(Effective)
Minimum cycle time
(Effective)
Actual cycle time
Minimum cycle time Minimum cycle time Minimum cycle time
(Effective)
Actual cycle time
(
Eff
ect
iv
e)
Actual cycle time
(
Effective
)