![background image](http://html1.mh-extra.com/html/omron/sysmac-c1000h/sysmac-c1000h_operation-manual_743079217.webp)
211
5-23-4
WATCHDOG TIMER REFRESH– WDT(94)
T
: Watchdog timer value
# (00 to 63)
Ladder Symbols
Definer Data Areas
@WDT(94) T
WDT(94) T
When the execution condition is OFF, WDT(94) is not executed. When the
execution condition is ON, WDT(94) extends the setting of the watchdog tim-
er (normally set by the system to 130 ms) by 100 ms times T.
Timer extension = 100 ms x T.
Precautions
If the cycle time is longer than the time set for the watchdog timer, 9F will be
output to the FAL area and the CPU will stop.
If the cycle time exceeds 6,500 ms, a FALS 9F will be generated and the sys-
tem will stop.
Timers might not function properly when the cycle time exceeds 100 ms.
When using WDT(94), the same timer should be repeated in the program at
intervals that are less than 100 ms apart. TIMH(15) should be used only in a
scheduled interrupt routine executed at intervals of 10 ms or less.
Flags
ER:
There are no flags affected by this instruction.
5-23-5
I/O REFRESH – IORF(97)
St
: Starting word
IR (I/O word only)
Ladder Symbol
E
: End word
IR (I/O word only)
Operand Data Areas
IORF(97)
St
E
IORF(97) can be used to refresh I/O words allocated to the CPU or an Ex-
pansion I/O Rack only. It cannot be used for other I/O words.
St must be less than or equal to E.
When the execution condition is OFF, IORF(97) is not executed. When the
execution condition is ON, all words between St and E will be refreshed. This
will be in addition to the normal I/O refresh performed during the CPU’s cycle.
The execution time for IORF(97), T
IORF
, is computed as follows:
T
IORF
= 1 ms + (130
µ
s x number of words refreshed)
Flags
There are no flags affected by this instruction.
5-24
Data Tracing (TRACE MEMORY SAMPLING – TRSM(45))
Data tracing can be used to facilitate debugging programs. To set up and use
data tracing it is necessary to have a GPC or FIT; no data tracing is possible
Description
Limitations
Description
Execution Time
Data Tracing (TRACE MEMORY SAMPLING – TRSM(45))
Section 5-24