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I
4. A2CCPU
- - - - - - - - - - - - - - - - - - - - MELSEC-A
(b) Data is stored to the status latch area when the SLT instruction is
executed.
With devices which turn on/off or store data using the same condi-
tion, the data to be stored in the status latch area differs before and
after the execution of the SLT instruction.
Example:
If a device which turns on and off with the same condition is present before
and after the SLT instruction in a program, the ON/OFF state will differ
before and after the execution of the SLT instruction.
[Circuit example]
[Monitor display of status latch data]
I"
I'
When the SLT instruction is
10
10
executed, Y10 is ON; ON is
displayed for the monitor .
When the SLT instruction is
executed, Y11 is OFF; OFF is
Y11
Y11
displayed for the monitor.
(3)
Caution
(a) Execution of the SLT instruction causes the scan time to be in-
creased by the value indicated below.
Therefore, take this in consideration when determining the watch
dog timer setting and constant scan time setting for the A2CCPU
taking these into consideration.
Table 4.6 SLT Instruction Execution Time
--------
Device Memory Only
Device Memory and File Register
Processing time
11 msec
31
meec
(msec)
4-29

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