Cycle Time Monitoring; High-Speed Inputs - Omron CJ - PROGRAMMING MANUAL 08-2008 Programming Manual

Cycle Time/High-speed Processing
6-1-3

Cycle Time Monitoring

1,2,3...
6-1-4

High-speed Inputs

Note The CS1G/H-CPU@@ (-V1), CJ1@-CPU@@, and CS1D (for Duplex-
CPU Systems), CPU Units do not support the parallel processing
modes.
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
Name
Maximum Cycle Time
(program execution
time for CS1-H, CJ1-H,
or CJ1M CPU Units in
parallel processing
mode)
Present Cycle Time
(program execution
time for CS1-H, CJ1-H,
or CJ1M CPU Units in
parallel processing
mode)
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. 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.
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.
Address
A262 and Stored every cycle in 32-bit binary in the follow-
A263 ing range:
0 to 429,496,729.5 ms in 0.1 ms units
(0 to FFFF FFFF)
A264 and Stored every cycle in 32-bit binary in the follow-
A265 ing range:
0 to 429,496,729.5 ms in 0.1 ms units
(0 to FFFF FFFF)
Section 6-1
Description
263