10-9
10 CPU Unit Functions
CJ2 CPU Unit Software User’s Manual
10-2 Cycle Time/High-speed
Processing
10
10-2-3 Monitoring the Cycle Time
Every cycle, the Auxiliary Area stores the maximum cycle time in A262 to A263 and the present cycle
time in A264 to A265 and A266 to A267.
z Auxiliary Area Flags and Words
The CX-Programmer can be used to read the average cycle time for the last 8 cycles.
Additional Information
The following methods are effective ways to reduce the cycle time in CJ-series PLCs:
• Put tasks that aren't being executed in WAIT status.
• Use with JMP(004), CJP (510), or CJPN (511) together with JME(005) to jump program sec-
tions that do not need to be executed.
When you want to receive pulses that are shorter than the cycle time, use the CJ1W-IDP01 High-speed
Input Unit.
The high-speed inputs can receive pulses with a pulse width (ON time) of 0.05 ms for the CJ1W-IDP01
High-speed Input Unit.
Inputs that are input to internal memory are cleared when the inputs are refreshed.
10-2-3 Monitoring the Cycle Time
Name Address Description
Maximum Cycle Time
(0.1-ms increments)
A262 and A263 The maximum cycle time in 0.1-ms increments is stored
every cycle in 8-digit hexadecimal in the following range:
0 to 429,496,729.5 ms (0 to FFFF FFFF)
The lower digits are stored in A262 and the upper digits
are stored in A263.
Present Cycle Time
(0.1-ms increments)
A264 and A265 The present cycle time in 0.1-ms increments is stored
every cycle in 8-digit hexadecimal in the following range:
0 to 429,496,729.5 ms (0 to FFFF FFFF)
The lower digits are stored in A264 and the upper digits
are stored in A265.
Present Cycle Time
(0.01-ms increments)
A266 and A267 The present cycle time value in 0.01-ms increments is
stored every cycle in 8-digit hexadecimal in the following
range: 0 to 42,949,672.95 ms (0 to FFFF FFFF)
The lower digits are stored in A266 and the upper digits
are stored in A267.
10-2-4 High-speed Inputs
CJ1W-IDP01: 0.05 ms
High-speed Input Unit or
High-density Input Unit
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