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2 Instructions
CP1E CPU Unit Instructions Reference Manual(W483)
Timer and Counter Instructions
2
TMHH/TMHHX
• The setting range for the set value (SV) is 0 to 9.999 s for TMHH(540) and 0 to 65.535 for
TMHHX(552).
• The timer accuracy is -0.01 to 0 s.
Hint
The timer PV and timeup used in TMHH/TMHHX instructions are refreshed at the timing below.
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 prop-
erly if they are used simultaneously.
• The Completion Flag is updated only when TMHH(540)/TMHHX(552) is executed. The Completion
Flag can thus be delayed by up to one cycle time from the actual set value.
• The present value of a timer will not be refreshed even if the task is on standby.
• 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.)
*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 The PV will be set to the SV when TMHH(540)/TMHHX(552) is executed.
• The present value of all operating timers will not be refreshed even if the timer is in a program section
that is jumped using JMP(004), CJP(510), JME(005).
• When TMHH(540)/TMHHX(552) is in a program section between IL(002) and ILC(003) and the pro-
gram section is interlocked, the PV will be reset to the SV and the Completion Flag will be turned
OFF.
• When a TMHH(540)/TMHHX(552) timer is forced set, its Completion Flag will be turned ON and its
PV will be set to 0. When a TMHH(540)/TMHHX(552) timer is forced reset, its Completion Flag will be
turned OFF and its PV will be reset to the SV.
• If online editing is used to overwrite a timer instruction, always reset the Completion Flag. The timer
will not operate properly unless the Completion Flag is reset.
Refresh timing Description
When each instruction is executed • The PV is updated every time that each instruction is executed.
• The timeup flag is ON when the PV is 0 and OFF otherwise.
Condition PV Completion Flag
Operating mode changed from RUN or MONITOR mode
to PROGRAM mode or vice versa.
*1
0OFF
Power supply interrupted and reset 0 OFF
Execution of CNR(545)/CNRX(547), the RESET
TIMER/COUNTER instructions
*2
BCD: 9999
Binary: FFFF
OFF
Operation in interlocked program
section (IL(002)-ILC(003))
Reset to SV. OFF
Operation in jumped program section
(JMP(004)-JME(005))
Retains previous
status.
Retains previous
status.