Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 995

Other Instructions
Variations
Applicable Program Areas
Description
Flags
Precautions
Note
3-29-3 EXTEND MAXIMUM CYCLE TIME: WDT(094)
Purpose
Ladder Symbol
Variations
962
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Block program areas
OK OK
When the execution condition is ON, CLC(040) turns OFF the Carry Flag
(CY). Although CLC(040) turns the Carry Flag OFF, the flag will be turned ON/
OFF by the execution of subsequent instructions which affect the Carry Flag.
Name Label
Error Flag ER
Equals Flag =
Carry Flag CY
Negative Flag N
+C(402), +CL(403), +BC(406), and +BCL(407) make use of the Carry Flag in
their addition operations. Use CLC(041) just before any of these instructions
to prevent any influence from other preceding instructions.
–C(412), –CL(413), –BC(416), and –BCL(417) make use of the Carry Flag in
their subtraction operations. Use CLC(041) just before any of these instruc-
tions to prevent any influence from other preceding instructions.
ROL(027), ROLL(572), ROR(028), and RORL(573) make use of the Carry
Flag in their rotation shift operations. When using any of these instructions,
use STC(040) and CLC(041) to set and clear the Carry Flag.
The +(400), +L(401), +B(404), +BL(405), –(410), –L(411), –B(414), and
–BL(415) instructions do no include the Carry Flag in their addition and sub-
traction operations. In general, use these instructions when performing addi-
tion or subtraction.
Extends the maximum cycle time, but only for the cycle in which the instruc-
tion is executed. WDT(094) can be used to prevent errors for long cycle times
when a longer cycle time is temporarily required for special processing.
WDT(094)
T
T: Timer setting
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported.
Immediate Refreshing Specification
Step program areas Subroutines
OK
Operation
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OFF
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Section 3-29
CLC(041)
@CLC(041)
Not supported.
Interrupt tasks
OK
WDT(094)
@WDT(094)
Not supported.