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Appendix 4 SPECIAL REGISTER LIST
(4) Scan information
TableApp.4.6 Special register
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
D9
Corresponding
CPU
SD500
Execution
program No.
Program No. in
execution
• Program number of program currently being executed is stored as BIN
value.
S (Status
change)
New
Qn(H)
QnPH
QnPRH
QnU
SD510
Low speed
excution type
program No.
Low speed
execution type
program No. in
execution
• Program number of low speed excution type program No. currently
being executed is stored as BIN value.
• Enabled only when SM510 is ON.
S (Every END
processing)
New
Qn(H)
QnPH
SD520
Current scan
time
Current scan time
(in 1 ms units)
• The current scan time is stored into SD520 and SD521.
(Measurement is made in 100 s units. (For the Universal model QCPU,
in 1 s units.))
SD520: Stores the ms place. (Storage range: 0 to 65535)
SD521: Stores the s place. (Storage range: 0 to 900 (For the
Universal model QCPU, storage range is 0 to 999))
(Example) When the current scan time is 23.6ms, the following values are
stored.
SD520 = 23
SD521 = 600
S (Every END
processing)
D9018
format
change
QCPU
SD521
Current scan time
(in 100 s units)
S (Every END
processing)
New
SD522
Initial scan time
Initial scan time
(in 1 ms units)
• Stores the scan time of an initial execution type program into SD522 and
SD523.
(Measurement is made in 100 s units. (For the Universal model QCPU,
in 1 s units.))
SD522: Stores the ms place. (Storage range: 0 to 65535)
SD523: Stores the s place. (Storage range: 0 to 900 (For the Universal
model QCPU, storage range is 0 to 999))
S (First END
processing)
New
Qn(H)
QnPH
QnPRH
QnU
SD523
Initial scan time
(in 100 s units)
SD524
Minimum scan
time
Minimum scan
time (in 1 ms
units)
• Stores the minimum value of the scan time except that of an initial
execution type program into SD524 and SD525. (Measurement is made
in 100 s units. (For the Universal model QCPU, in 1 s units.))
SD524: Stores the ms place. (Storage range: 0 to 65535)
SD525: Stores the s place. (Storage range: 0 to 900 (For the Universal
model QCPU, storage range is 0 to 999))
S (Every END
processing)
D9017
format
change
SD525
Minimum scan
time (in 100 s
units)
S (Every END
processing)
New
SD526
Maximum scan
time
Maximum scan
time (in 1 ms
units)
• Stores the maximum value of the scan time except that of an initial
execution type program into SD526 and SD527. (Measurement is made
in 100 s units. (For the Universal model QCPU, in 1 s units.))
SD526: Stores the ms place. (Storage range: 0 to 65535)
SD527: Stores the s place. (Storage range: 0 to 900 (For the Universal
model QCPU, storage range is 0 to 999))
S (Every END
processing)
D9019
format
change
SD527
Maximum scan
time (in 100 s
units)
New
SD528
Current scan
time for low
speed execution
type programs
Current scan time
(in 1 ms units)
• Stores the current scan time of a low speed execution type program into
SD528 and SD529.
(Measurement is made in 100 s units.)
SD528: Stores the ms place. (Storage range: 0 to 65535)
SD529: Stores the s place. (Storage range: 0 to 900)
S (Every END
processing)
New
Qn(H)
QnPH
SD529
Current scan time
(in 100 s units)
SD532
Minimum scan
time for low
speed execution
type programs
Minimum scan
time (in 1 ms
units)
• Stores the minimum value of the scan time of a low speed execution
type program into SD532 and SD533.
(Measurement is made in 100 s units.)
SD532: Stores the ms place. (Storage range: 0 to 65535)
SD533: Stores the s place. (Storage range: 0 to 900)
S (Every END
processing)
New
SD533
Minimum scan
time (in 100 s
units)
SD534
Maximum scan
time for low
speed execution
type programs
Maximum scan
time (in 1 ms
units)
• Stores the maximum value of the scan time except that of the first scan
of a low speed execution type program into SD534 and SD535.
(Measurement is made in 100 s units.)
SD534: Stores the ms place. (Storage range: 0 to 65535)
SD535: Stores the s place. (Storage range: 0 to 900)
S (Every END
processing)
New
SD535
Maximum scan
time (in 100 s
units)
SD540
END processing
time
END processing
time (in 1 ms
units)
• Stores the time from the end of a scan execution type program to the
start of the next scan into SD540 and SD541.
(Measurement is made in 100 s units.(For the Universal model QCPU,
in 1 s units.))
SD540: Stores the ms place. (Storage range: 0 to 65535)
SD541: Stores the s place. (Storage range: 0 to 900) (Storage range: 0
to 900 (For the Universal model QCPU, storage range is 0 to 999))
S (Every END
processing)
New
Qn(H)
QnPH
QnPRH
QnU
SD541
END processing
time (in 100 s
units)