Mitsubishi Electric MELSEC-Q Series User Manual page 230

APPENDICES
(4) Scan information
Number Name
Current scan time
SD520
(in 1 ms units)
Current scan
time Current scan time
SD521
(in 100 µs units)
Minimum scan time (in
SD524
Minimum scan 1 ms units)
time
Minimum scan time (in
SD525
100 µs units)
Maximum scan time
SD526
Maximum scan (in 1 ms units)
time
Maximum scan time
SD527
(in 100 µs units)
END processing time
SD540
(in 1 ms units)
END processing
time
END processing time
SD541
(in 100 µs units)
Constant scan wait
SD542
time (in 1 ms units)
Constant scan
wait time
Constant scan wait
SD543
time (in 100 µs units)
Scan program
SD548 execution time
(in 1 ms units)
Scan program
execution time
Scan program
SD549 execution time
(in 100 µs units)
App - 14
Meaning
• Stores current scan time (in 1 ms units)
Range from 0 to 65535
• Stores current scan time (in 100 µs units)
Range from 00000 to 900
(Example)
A current scan of 23.6 ms would be stored as follows:
D520=23
D521=600
• Stores minimum value of scan time (in 1 ms units)
• Range from 0 to 65535
• Stores minimum value of scan time (in 100 µs units)
• Range of 000 to 900
• Stores maximum value of scan time, excepting the first scan. (in 1 ms units)
• Range from 0 to 65535
• Stores maximum value of scan time, excepting the first scan. (in 100 µs units)
• Range of 000 to 900
• Stores time from completion of scan program to start of next scan. (in 1 ms units)
• Range from 0 to 65535
• Stores time from completion of scan program to start of next scan. (in 100 µs
units)
• Range of 000 to 900
• Stores wait time when constant scan time has been set.
(in 1 ms units)
• Range from 0 to 65535
• Stores wait time when constant scan time has been set.
(in 100 µs units)
• Range of 000 to 900
• Stores execution time for scan execution type program during 1 scan (in 1 ms
units)
• Range from 0 to 65535
• Stores each scan
• Stores execution time for scan execution type program during 1 scan (in 100 µs
units)
• Range of 000 to 900
• Stores each scan
Explanation
MELSEC-Q
Set by (When set)
S (Every END
processing)
S (Every END
processing)
S (Every END
processing)
S (Every END
processing)
S (Every END
processing)
S (Every END
processing)
S (First END
processing)
S (Every END
processing)
App - 14