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221
Timer and Counter Instructions
Section 3-6
Flags
Precautions
Timer numbers are shared by the TIM, TIMX(550), TIMH(015), TIMHX(551),
TMHH(540), TMHHX(552), TTIM(087), TTIMX(555), TIMW(813),
TIMWX(816), TMHW(815), and TMHWX(817) 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 properly
if they are used simultaneously.
Timers will be reset or paused in the following cases. (When a TTIM(087)/
TTIMX(555) timer is reset, its PV is reset to 0000 and its Completion Flag is
turned OFF.)
Note
1.
If the IOM Hold Bit (A50012) has been turned ON, the status of timer Com-
pletion Flags and PVs will be maintained when the operating mode is
changed.
2.
If the IOM Hold Bit (A50012) has been turned ON and the status of the IOM
Hold Bit itself is protected in the PLC Setup, the status of timer Completion
Flags and PVs will be maintained even when the power is interrupted.
3.
The PV will be set to the SV when TTIM(087)/TTIMX(555) is executed.
When TTIM(087)/TTIMX(555) is in a program section between IL(002) and
ILC(003) and the program section is interlocked, the PV will retain its previous
value (it won’t be reset). Be sure to take this fact into account when
TTIM(087)/TTIMX(555) is programmed between IL(002) and ILC(003).
When an operating TTIM(087)/TTIMX(555) timer is in a program section
between JMP(004) and JME(005) and the program section is jumped, the PV
will retain its previous value. Be sure to take this fact into account when
TTIM(087)/TTIMX(555) is programmed between JMP(004) and JME(005).
When a TTIM(087)/TTIMX(555) timer is forced set, its Completion Flag will be
turned ON and its PV will be reset to 0000. When a TTIM(087)/TTIMX(555)
timer is forced reset, its Completion Flag will be turned OFF and its PV will be
reset to 0000. The forced set and forced reset operations take priority over the
status of the timer and reset inputs.
The timer’s PV is refreshed only when TTIM(087)/TTIMX(555) is executed, so
the timer will not operate properly when the cycle time exceeds 100 ms
because the timer increments in 100-ms units.
Name
Label
Operation
Error Flag
ER
ON if N is indirectly addressed through an Index Register
but the address in the Index Register is not the PV
address of a timer.
ON if in BCD mode and S does not contain BCD data.
OFF in all other cases.
Condition
PV
Completion Flag
Operating mode changed from RUN or
MONITOR mode to PROGRAM mode or
vice versa.
1
0000
OFF
Power supply interrupted and reset
2
0000
OFF
Execution of CNR(545)/CNRX(547), the
RESET TIMER/COUNTER instructions
3
BCD: 9999
Binary: FFFF
OFF
Operation in interlocked program section
(IL(002)–ILC(003))
Retains previ-
ous status.
Retains previous status.
Operation in jumped program section
(JMP(004)–JME(005))
Retains previ-
ous status.
Retains previous status.
Summary of Contents for CJ1G-CPUxx
Page 3: ...iv N o t i c e ...
Page 5: ...vi ...
Page 21: ...xxii Conformance to EC Directives 6 ...
Page 35: ......
Page 1131: ...1110 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...