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Each TC number can be used as the definer in only one TIMER or COUNTER
instruction.
If the cycle time is greater than 10 ms, use TC 000 through TC 015.
Description TIMH(15) operates in the same way as TIM except that TIMH measures in units
of 0.01 second.
The cycle time affects TIMH(15) accuracy if TC 016 through TC 511 are used. If
the cycle time is greater than 10 ms, use TC 000 through TC 015.
Refer to
5-14-1 TIMER – TIM
for operational details and examples. Except for
the above, and all aspects of operation are the same.
Precautions Timers in interlocked program sections are reset when the execution condition
for IL(02) is OFF. Power interruptions also reset timers. If a timer that is not reset
under these conditions is desired, SR area clock pulse bits can be counted to
produce timers using CNT. Refer to
5-14-4 COUNTER – CNT
for details.
Program execution will continue even if a non-BCD SV is used, but timing will not
be accurate.
The SV of the timers can be set in the range #0000 to #9999 (BCD). If the SV for a
timer is set to #0000 or #0001, it will operate in the following way. If the SV is set
to #0000, when the timer input goes from OFF to ON, the Completion Flag will
turn ON. There may be a time delay if TC 000 to TC 003 are used. If the SV is set
to #0001, because the timer accuracy is 0 to –0.1 s, the actual time will be a value
between 0 and 0.1 s, and the Completion Flag may turn ON as soon as the timer
input goes from OFF to ON. With other values also, allow for a timer accuracy of
0 to –0.1 s when setting the SV.
Flags ER: SV is not in BCD.
Indirectly addressed DM word is non-existent. (Content of ∗DM word is
not BCD, or the DM area boundary has been exceeded.)
5-14-3 TOTALIZING TIMER – TTIM(87)
SV: Set value (word, BCD)
IR, AR, DM, HR, LR
RB: Reset bit
IR, SR, AR, HR, LR
Ladder Symbol
Operand Data Areas
TTIM(87)
N
SV
RB
N: TC number
# (000 through 511)
Definer Values
Limitations SV is between 0000 and 9999 (000.0 and 999.9 s) and must be in BCD. The dec-
imal point is not entered.
Each TC number can be used as the definer in only one TIMER or COUNTER
instruction.
Description TTIM(87) is used to create a timer that increments the PV every 0.1 s to time
between 0.1 and 999.9 s. TTIM(87) increments in units of 0.1 second from zero.
TTIM(87) accuracy is +0.0/–0.1 second. A TTIM(87) timer will time as long as its
execute condition is ON until it reaches the SV or until RB turns ON to reset the
timer. TIMM(87) timers will time only as long as they are executed every cycle,
i.e., they do not time, but maintain the current PV, in interlocked program sec-
tions or when they are jumped in the program.
Timer and Counter Instructions Section 5-14