App - 54
APPENDICES
(4) Scan information
Table App. 2.5. Special relay
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU
SM510
Low speed program
execution flag
OFF : Completed or not
executed
ON : Execution under way.
• Goes ON when low speed execution type program is
executed.
S (Every END
processing)
New QnA
SM551
Reads module service
interval
OFF : Ignored
ON : Read
• When this relay goes from OFF to ON, the module
service interval designated by SD550 is read to
SD551 to SD552.
UNew QnA
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