Omron CJ - INSTRUCTIONS User Manual

3. Instructions
232
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Function
• When the timer input is OFF, the timer specified by N is reset, i.e., the timer's Completion Flag is
turned OFF.
• When the timer input goes from OFF to ON, TMUH(544)/TMUHX(557) starts decrementing the PV. If
the set value is reached while the timer input is ON, the timer's Completion Flag will be turned ON
(the timer times out).
• The status of the timer's Completion Flag will be maintained after the timer times out. To restart the
timer, the timer input must be turned OFF and then ON again.
• Read this timer's Completion Flag only. The timer's PV is used by the system, so it cannot be read.
• The setting range for the set value (SV) is 0 to 0.09999 s for TMUH(544) and 0 to 0.65535 s for
TMUHX(557).
• The timer accuracy is -0.01 to 0 ms.
Hint
A TIMU(541)/TIMUX(556) instruction's Completion Flag is refreshed as shown in the following table.
Precautions
• Timer numbers are shared with other timer instructions. If two timers share the same timer number,
but are not used simultaneously, a duplication error will be generated when the program is checked,
but the timers will operate normally. Timers which share the same timer number will not operate
properly if they are used simultaneously.
• The timer PV cannot be read.
• The Completion Flag is updated only when TIMU(541)/TIMUX(556) is executed. The Completion
Flag can thus be delayed by up to one cycle time from the actual set value.
• The timer will not operate properly when the cycle time exceeds 10 ms.
• Timers will be reset or paused in the following cases. (When a timer is reset, its PV is reset to the SV
and its Completion Flag is turned OFF.)
Note 1 If the IOM Hold Bit (A500.12) has been turned ON, the status of timer Completion Flags and PVs will be maintained
when the operating mode is changed.
2 If the IOM Hold Bit (A500.12) 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.
Execution of TIMU(541)/TIMUX(556) The Completion Flag is turned ON if the SV is reached.
The Completion Flag is turned OFF if the SV has not
been reached.
Condition Completion Flag
Operating mode changed from RUN or MONITOR mode to PROGRAM
mode or vice versa. (See note 1.)
OFF
Power supply interrupted and reset (See note 2.) OFF
Execution of CNR(545)/CNRX(547), the RESET TIMER/COUNTER
instructions
OFF
Operation in interlocked program section
(IL(002)-ILC(003))
OFF
Operation in jumped program section
(JMP(004)-JME(005))
Retains previous status.

Omron CJ - INSTRUCTIONS Specifications

General

Brand	Omron
Model	CJ - INSTRUCTIONS
Category	Controller
Language	English