Omron CJ - REFERENCE MANUAL 02-2010 Reference Manual page 261

• 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.
• The timers will not operate correctly if the cycle time exceeds 100 ms.
• If the TMHH/TMHHX instruction is in a task that is stopped or is not executed because it is jumped
by a JMP, CJMP, or CJPN instruction, there will be an error in the timer of up to minus 10 ms.
• The timer PV cannot be accessed accurately.
CS/CJ/NSJ Series Instructions Reference Manual (W474)
3. Instructions
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