Omron CJ1G-CPU series, Programming Manual

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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 refreshing methods
• Disabling Special I/O Unit cyclic refreshing
• Improving the refresh response for data links and other CPU Bus Unit
data (CS1-H, CJ1-H, or CJ1M CPU Units only)
• Reducing fluctuation in the cycle time through background execution of
data manipulations (CS1-H, CJ1-H, or CJ1M CPU Units only)
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 The cycle time can also be fixed for CS1-H, CJ1-H, or CJ1M CPU
Units by 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
Address Name Setting Default
208
Bits: 0 to 15 Minimum Cycle Time 0001 to 7D00: 1 to 32,000 ms
(1-ms units) 0000 (no
minimum)
Minimum cycle time
(Effective)
Actual cycle time
Minimum cycle time
(Effective)
Actual cycle time
Minimum cycle time
(Effective)
Actual cycle time
Minimum cycle time
Actual cycle time
(Effective)
Minimum cycle time
Actual cycle time
(Effective)
Minimum cycle time
(Effective)
Actual cycle time