6-33
6 I/O Memory Areas
CJ2 CPU Unit Software User’s Manual
6-16 Timer Areas
6
The following table shows when timer PVs and Completion Flags will be reset.
*1 The TIML(542), TIMLX(553), MTIM(543), and MTIMX(554) instructions do not use timer numbers, and they
are reset under different conditions. (TIML(542) and TIMLX(553) are reset to their set values, and MTIM(543)
and MTIMX(554) are reset to 0.) Refer to the descriptions of these instructions for details.
*2 If the IOM Hold Bit (A500.12) is ON, the PV and Completion Flag will be retained when a fatal error occurs or
the operating mode is changed from PROGRAM mode to RUN or MONITOR mode or vice-versa. The PV and
Completion Flag will be cleared when power is cycled. Refer to the CS/CJ/NSJ-series Instructions Refer-
ence Manual (Cat. No. W474)
for details.
*3 If the IOM Hold Bit (A500.12) is ON and the IOM Hold Bit Check Box is selected in the Startup Hold Area on
the Startup Tab Page in the PLC Setup, the PV and Completion Flag will be retained when the PLC’s power is
cycled.
*4 The present values of HUNDRED-MS TIMER (TIM/TIMX(550)), TEN-MS TIMER (TIMH(015)/TIMHX(551)),
ONE-MS TIMER (TMHH(540)/TMHHX(552)), TIMER WAIT (TIMW(813)/TIMWX(816), and HIGH-SPEED
TIMER WAIT (TMHW(815)/TMHWX(817)) timers programmed with timer numbers T0 to T2047 will be updated
even when jumped between JMP and JME instructions or when in a task that is in WAIT status. The present
value of timers programmed with timer numbers T2048 to T4095 will be held when jumped or when in a task
that is in WAIT status.
• Timer Completion Flags can be force-set and force-reset.
• There are no restrictions in the order of using timer numbers or in the number of N.C. or N.O. condi-
tions that can be programmed.
• The present data of all timers except for TENTH-MS TIMER (TIMU(541)/TIMUX(556)) and HUNDER-
DTH-MS TIMER (TMUH(544)/TMUHX(557)) can be read as word data.
Instruction name*1
Effect on PV and Completion Flag
Operation in
Jumps and Interlocks
Mode change
(PROGRAM to
RUN or MONI-
TOR or vice-
versa)
*2
PLC startup
*3
TRSET(549)
Jumps
(JMP-JME) or
tasks in WAIT
status
*4
Interlocks
(IL-ILC)
HUNDRED-MS TIMER:
TIM/TIMX(550)
PV → 0
Flag → OFF
PV → 0
Flag → OFF
PV → Maintained
Flag → OFF
PVs refreshed
in operating
timers.
PV → SV
(Reset to SV.)
Flag → OFF
TEN-MS TIMER:
TIMH(015)/TIMHX(551)
ONE-MS TIMER:
TMHH(540)/TMHHX(552)
TENTH-MS TIMER:
TIMU(541)/TIMUX(556)
*1
HUNDERDTH-MS TIMER:
TMUH(544)/TMUHX(557)
*1
ACCUMULATIVE TIMER:
TTIM(087)/TTIMX(555)
PV main-
tained.
PV main-
tained.
TIMER WAIT:
TIMW(813)TIMWX(816)
PVs refreshed
in operating
timers.
---
HIGH-SPEED TIMER WAIT:
TMHW(815)/TMHWX(817)
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