Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual page 298

Timer and Counter Instructions
Description
Flags
Precautions
258
Area
Indirect DM/EM ---
addresses in BCD
Constants ---
Data Registers ---
Index Registers ---
Indirect addressing ,IR0 to ,IR15
using Index Registers
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
When the timer input is OFF, the timer specified by N is reset, i.e., the timer's
Completion Flag is turned OFF.
When the timer input goes from OFF to ON, TIMU(541)/TIMUX(556) starts
decrementing the PV. If the set value is reached while the timer input is ON,
the timer's Completion Flag will be turned ON (the timer times out).
The status of the timer's Completion Flag will be maintained after the timer
times out. To restart the timer, the timer input must be turned OFF and then
ON again.
Read this timer's Completion Flag only. The timer's PV is used by the system,
so it cannot be read.
Name Label
Error Flag ER
Equals Flag =
Negative Flag N
Timer numbers are shared with other timer 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.
The timer PV cannot be read.
The Completion Flag is updated only when TIMU(541)/TIMUX(556) is exe-
cuted. The Completion Flag can thus be delayed by up to one cycle time from
the actual set value.
The timer will not operate properly when the cycle time exceeds 100 ms.
Timers will be reset or paused in the following cases. (When a timer is reset,
its PV is reset to the SV and its Completion Flag is turned OFF.)
Condition
Operating mode changed from RUN or MONITOR mode
to PROGRAM mode or vice versa. (See note 1.)
Power supply interrupted and reset (See note 2.)
N
Operation
ON if timer number N is indirectly addressed through an
Index Register but the address in the Index Register is not
the address of a timer's Completion Flag or PV.
ON if in BCD mode and S does not contain BCD data.
OFF in all other cases.
Unchanged
Unchanged
Section 3-6
S
*D00000 to *D32767
*E00000 to *E32767
*En_00000 to *En_32767
(n = 0 to C)
BCD:
#0000 to 9999 (BCD)
"&" cannot be used.
Binary:
&0 to &65535 (decimal)
#0000 to #FFFF (hex)
DR0 to DR15
---
Completion Flag
OFF
OFF