Omron CJ - INSTRUCTIONS Reference Manual page 274

3. Instructions
• When TTIM(087)/TTIMX(555) is in a program section between IL(002) and ILC(003) and the program
section is interlocked, the PV will retain its previous value (it will not be reset). Be sure to take this fact
into account when TTIM(087)/TTIMX(555) is programmed between IL(002) and ILC(003).
• When an operating TTIM(087)/TTIMX(555) timer is in a program section between JMP(004) and
JME(005) and the program section is jumped, the PV will retain its previous value. Be sure to take
this fact into account when TTIM(087)/TTIMX(555) is programmed between JMP(004) and
JME(005).
• When a TTIM(087)/TTIMX(555) timer is forced set, its Completion Flag will be turned ON and its PV
will be reset to 0. When a TTIM(087)/TTIMX(555) timer is forced reset, its Completion Flag will be
turned OFF and its PV will be reset to 0. The forced set and forced reset operations take priority over
the status of the timer and reset inputs.
• The timer's PV is refreshed only when TTIM(087)/TTIMX(555) is executed, so the timer will not
operate properly when the cycle time exceeds 100 ms because the timer increments in 100-ms units.
• The timer's Completion Flag is refreshed only when TTIM(087)/TTIMX(555) is executed, so a delay
of up to one cycle may be required for the Completion Flag to be turned ON after the timer times out.
Example Programming
When timer input CIO 0.00 is ON in the following example, the timer PV will begin counting up from 0.
Timer Completion Flag T0001 will be turned ON when the PV reaches the SV.
If the reset input is turned ON, the timer PV will be reset to 0 and the Completion Flag (T0001) will be
turned OFF. (Usually the reset input is turned ON to reset the timer and then the timer input is turned
ON to start timing.)
If the timer input is turned OFF before the SV is reached, the timer will stop timing but the PV will be
maintained. The timer will resume from its previous PV when the timer input is turned ON again.
Timer input ON
0.00 OFF
Timer PV
T0001
Timer Completion
Flag
ON
T0001
OFF
ON
Reset input
OFF
236
0.00
TTIM
0001
#0100
0.01
#0100
0
0.00
TTIMX
or
&0100
0.01
ON
OFF
#0100
0
ON
OFF
ON
OFF
CS/CJ/NSJ Series Instructions Reference Manual (W474)
0001
Timing resumes.
PV maintained.