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3. Instructions
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Timer and Counter Instructions
3
TMHH/TMHHX
• For all CPU Units except CS1D CPU Units, the present value of all operating timers with timer
numbers 0 to 15 will be refreshed even if the timer is in a program section that is jumped using
JMP(004), CJMP(510), CJPN(511), JME(005). (The jumped timer instruction will not be executed,
but the PV will be refreshed every 1 ms.) The present values will not be updated with a CS1D CPU
Unit.
• When TMHH(540)/TMHHX(552) 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.
• 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.
• The following restrictions apply if Synchronous Unit Operation is used with a CJ2H-CPU6@-(EIP)
CPU Unit or if the internal pulse control period is set to 1 ms for a CJ2M-CPU@@ CPU Unit with unit
version 2.0 or later.
• An error of up to one cycle time will occur in the timer PV accuracy.
• The timers will not operate correctly if the cycle time exceeds 100 ms.
• If an TMHH(540)/TIMHHX(552) instruction is in a task that is stopped or is not executed because
it is jumped by a JMP(004), CJMP(510), or CJPN(511) instruction, the timer will not operate cor-
rectly.
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