Omron SYSMAC CJ - REFERENCE MANUAL 01-2008 Reference Manual page 1210

Other Instructions
Description
Flags
Precautions
Area
DM Area
EM Area without bank
EM Area with bank
Indirect DM/EM
addresses in binary
Indirect DM/EM
addresses in BCD
Constants
Data Registers
Index Registers
Indirect addressing
using Index Registers
WDT(094) extends the maximum cycle time for the cycle in which this instruc-
tion is executed. The watchdog timer setting in the PLC Setup is extended by
an interval of T 10 ms (0 to 39,990 ms).
The following screen capture shows the PLC Setup setting from the CX-Pro-
grammer.
The following table shows the watchdog timer settings in the PLC Setup. The
default value for the maximum cycle time is 1,000 ms, although it can be set
anywhere from 1 to 40,000 ms in 10-ms units.
Name
Watch cycle A Cycle Time Too Long error (fatal
time error) will be registered if the cycle time
exceeds the maximum setting.
Sets the maximum cycle time.
(This setting is valid only when the first
setting has been set to 1.)
Name Label
Error Flag ER
The following table shows relevant flags and words in the Auxiliary Area.
Name Address
Cycle Time Too Long A40108
Flag
Maximum Cycle A262 and
Time A263
Present Cycle Time A264 and
A265
WDT(094) can be used more than once in a cycle. When WDT(094) is exe-
cuted more than once the cycle time extensions are added together, although
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0000 to 0F9F (binary)
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Function
Operation
ON if the watchdog timer setting exceeds 40 seconds.
OFF in all other cases.
ON when the present cycle time exceeds the
maximum cycle time (watch cycle time) set in the
PLC Setup. This is a fatal error which causes pro-
gram execution to stop.
These words contain the maximum cycle time in
32-bit binary. This value is updated every cycle.
These words contain the present cycle time in 32-
bit binary. This value is updated every cycle.
Section 3-31
T
Settings
0: Default setting (1,000 ms)
1: User time setting
0001 to 0FA0
(1 to 40,000 ms, 10-ms units)
Operation
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