App - 37 App - 37
MELSEC-Q
APPENDICES
Special Register List (Continued)
Number
Name
Meaning
Explanation
Set by
(When set)
Corresponding
ACPU
D9
Corresponding
CPU
SD542
Constant scan wait
time (in 1 ms units)
• Stores wait time when constant scan time has been set.
(in 1 ms units)
• Range from 0 to 65535
SD543
Constant scan
wait time
Constant scan wait
time (in 100
µ
s units)
• Stores wait time when constant scan time has been set.
(in 100
µ
s units)
• Range of 000 to 900
S (First
END
processing)
New
SD544
Cumulative
execution time for
low speed execution
type programs
(in 1 ms units)
• Stores cumulative execution time for low speed execution
type programs. (in 1 ms units)
• Range from 0 to 65535
• Cleared to 0 following 1 low speed scan
SD545
Cumulative
execution time
for low speed
execution type
programs
Cumulative
execution time for
low speed execution
type programs
(in 100
µ
s units)
• Stores cumulative execution time for low speed execution
type programs. (in 100
µ
s units)
• Range of 000 to 900
• Cleared to 0 following 1 low speed scan
S (Every
END
processing)
New
SD546
Execution time for
low speed execution
type programs
(in 1 ms units)
• Stores low speed program execution time during 1 scan
(in 1 ms units)
• Range from 0 to 65535
• Stores each scan
SD547
Execution time
for low speed
execution type
programs
Execution time for
low speed execution
type programs
(in 100
µ
s units)
• Stores low speed program execution time during 1 scan
(in 100
µ
s units)
• Range of 000 to 900
• Stores each scan
S (Every
END
processing)
New
SD548
Scan program
execution time
(in 1 ms units)
• Stores execution time for scan execution type program
during 1 scan (in 1 ms units)
• Range from 0 to 65535
• Stores each scan
SD549
Scan program
execution time
Scan program
execution time
(in 100
µ
s units)
• Stores execution time for scan execution type program
during 1 scan (in 100
µ
s units)
• vRange of 000 to 900
• Stores each scan
S (Every
END
processing)
New
SD550
Service
interval
measurement
module
Unit/module No.
• Sets I/O number for module that measures service interval
U
New
SD551
Module service
interval
(in 1 ms units)
• When SM551 is ON, stores service interval for module
designated by SD550. (in 1 ms units)
• Range from 0 to 65535
SD552
Service
interval time
Module service
interval
(in 100
µ
s units)
• When SM551 is ON, stores service interval for module
designated by SD550. (in 100
µ
s units)
• Range from 000 to 900
S
(Request)
New
+Rem