Accumulative Timer: Ttim(087)/Ttimx(555 - Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual

Timer and Counter Instructions
Note
Operation Example
3-6-6

ACCUMULATIVE TIMER: TTIM(087)/TTIMX(555)

Purpose
262
Execution of CNR(545)/CNRX(547), the RESET TIMER/
COUNTER instructions
Operation in interlocked program section
(IL(002)–ILC(003))
Operation in jumped program section
(JMP(004)–JME(005))
1. If the IOM Hold Bit (A50012) has been turned ON, the status of timer Com-
pletion Flags and PVs will be maintained when the operating mode is
changed.
2. If the IOM Hold Bit (A50012) has been turned ON and the status of the IOM
Hold Bit itself is protected in the PLC Setup, the status of timer Completion
Flags and PVs will be maintained even when the power is interrupted.
Note When TIMU(541)/TIMUX(556) is in a program section between IL(002) and
ILC(003) and the program section is interlocked, the PV will be reset to the SV
and the Completion Flag will be turned OFF.
TIMUH(544)/TIMUHX(557) timers may not time accurately when used in a
program section jumped by the JMP(004), CJMP(510), CJPN(511), and
JME(005) instructions.
When a TIMU(541)/TIMUX(556) timer is forced set, its Completion Flag will
be turned ON. When a TIMU(541)/TIMUX(556) timer is forced reset, its Com-
pletion Flag will be turned OFF.
If online editing is used to overwrite a timer instruction, always reset the Com-
pletion Flag. The timer will not operate properly unless the Completion Flag is
reset.
A TIMU(541)/TIMUX(556) instruction's Completion Flag is refreshed as
shown in the following table.
Execution of TMUH(544)
/TMUHX(557)
or
When timer input CIO 000000 goes from OFF to ON in this example, the timer
PV will begin counting down. The Timer Completion Flag, T0000, will be
turned ON after 1.23 ms.
When CIO 000000 goes OFF, the Timer Completion Flag, T0000, will be
turned OFF.
TTIM(087)/TTIMX(555) operates an incrementing timer with units of 0.1-s.
The setting range for the set value (SV) is 0 to 999.9 s for TTIM(087) and 0 to
6,553.5 s for TTIMX(555). The timer accuracy is –0.01 to 0 s.
Note The timer accuracy for CS1D CPU Units is 10 ms + the cycle time
Condition
The Completion Flag is turned ON if the SV is reached.
The Completion Flag is turned OFF if the SV has not been
reached.
TMUH
#0123
TMUHX
&0123
Section 3-6
Completion Flag
OFF
OFF
Retains previous status.