Omron CJ2 CPU UNIT SOFTWARE User Manual page 252

6 I/O Memory Areas
Using the Clock Pulses
The following example turns CIO 0.00 ON and OFF at 0.5 s intervals.
P_1s
Clock Pulse Refreshing
The clock pulses are refreshed even during program execution. ON/OFF status may not be the
same at the beginning and end of a program.
Clock Pulse Error
The maximum error in the clock pulses is 0.01% (at 25°C). For long-term, time-based control, we
recommend you use the internal clock instead of the clock pulses. Be sure to allow for the error in
the internal clock.
6-46
0.00
0.5 s
0.00
0.5 s
Instruction
Operand
P_1s
LD
OUT 0.00
CJ2 CPU Unit Software User's Manual