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Cycle Time/High-speed Processing Section 6-1
Note The CS1G/H-CPU@@ (-V1), CJ1@-CPU@@, and CS1D (for Duplex-
CPU Systems), CPU Units do not support the parallel processing
modes.
6-1-3 Cycle Time Monitoring
The maximum cycle time and present cycle time are stored in the Auxiliary
Area every cycle.
Note Indicates the cycle time for program execution when using a parallel process-
ing mode.
Auxiliary Area Flags and Words
A Programming Device (CX-Programmer or Programming Console) can be
used to read the average of the cycle times in the last 8 cycles.
Reducing the Cycle Time
The following methods are effective ways to reduce the cycle time in CS/CJ-
series PLCs:
1,2,3... 1. Put tasks that aren’t being executed in standby.
2. Jump program sections that aren’t being executed with JMP(004) and
JME(005).
Note Communications response can be increased by using a parallel processing
mode. (CS1-H and CJ1-H CPU Units, and CS1D CPU Units for Single-CPU
Systems do not support this function.) If a parallel processing mode is used,
the current peripheral servicing cycle will be stored in A268 (Peripheral Ser-
vicing Cycle Time) each peripheral servicing cycle.
6-1-4 High-speed Inputs
When you want to receive pulses that are shorter than the cycle time, use the
CS1W-IDP01 High-speed Input Unit or use the high-speed inputs of the
C200H-ID501/ID215 and C200H-MD501/MD115/MD215 High-density I/O
Units.
The high-speed inputs can receive pulses with a pulse width (ON time) of
1 ms or 4 ms for the C200H High-density Input Units and 0.1 ms for the
CS1W-IDP01 High-speed Input Unit.
Name Address Description
Maximum Cycle Time
(program execution
time for CS1-H, CJ1-H,
or CJ1M CPU Units in
parallel processing
mode)
A262 and
A263
Stored every cycle in 32-bit binary in the follow-
ing range:
0 to 429,496,729.5 ms in 0.1 ms units
(0 to FFFF FFFF)
Present Cycle Time
(program execution
time for CS1-H, CJ1-H,
or CJ1M CPU Units in
parallel processing
mode)
A264 and
A265
Stored every cycle in 32-bit binary in the follow-
ing range:
0 to 429,496,729.5 ms in 0.1 ms units
(0 to FFFF FFFF)
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