Tenth-Ms Timer: Timu(541)/Timux(556 - Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual

Timer and Counter Instructions
Refreshing of TMHH(540)
and TMHHX(552) PVs and
Completion Flags
3-6-4

TENTH-MS TIMER: TIMU(541)/TIMUX(556)

Purpose
256
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 pro-
gram 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 0000. 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.
The operation of the = Flag and N Flag depends on the model of the CPU
Unit. Refer to Flags, above, for details.
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 TMHH(540)/TMHHX(552) instruction's PV and Completion Flag are
refreshed as shown in the following tables.
Timer numbers 0 to 15 (Cannot be used with unit version 4.1 of the CJ1-H-R
CPU Units, but can be used with other unit versions of the CJ1-H-R CPU
Units.):
Refresh timing
Execution of
TMHH(540)/
TMHHX(552)
1-ms interval refreshing
Timer numbers 16 to 4,095 (CJ1-H-R CPU Units only):
Refresh timing
Execution of
TMHH(540)/
TMHHX(552)
TIMU(541)/TIMUX(556) operates a decrementing timer with units of 0.1-ms.
The setting range for the set value (SV) is 0 to 0.9999 s for TIMU(541) and 0
to 6.5535 s for TIMUX(556). The timer accuracy is –0.1 to 0 ms.
Note These instructions can be used in the CJ1-H-R CPU Units only.
Data refreshed
The Completion Flag is turned ON if the PV is 0000.
The Completion Flag is turned OFF if the PV is not 0000.
The timer's PV is refreshed every 1 ms.
Data refreshed
The Completion Flag is turned ON if the PV is 0000.
The Completion Flag is turned OFF if the PV is not 0000.
Section 3-6