Mitsubishi Electric M800VW Series Programming Manual page 59

M800V/M80V Series PLC Programming Manual (1/2)
4 Explanation of Devices
4.4 Detailed Explanation of Devices
Device Name
Device allocation
SD290
(Same as parameter con-
tents)
SD291
SD292
:
SD302
SD303
SD304
1-second counter
SD412
2n-second clock set
SD414
Scan counter
(Medium-speed ladder)
SD420
Scan counter
(High-speed ladder)
SD430
Current scan time
SD520
(Medium-speed ladder)
Current scan time
(Medium-speed ladder)
SD521
Minimum scan time
SD524
(Medium-speed ladder)
Minimum scan time
(Medium-speed ladder)
SD525
Maximum scan time
SD526
(Medium-speed ladder)
Maximum scan time
(Medium-speed ladder)
SD527
(*1) Refer to "List of PLC Alarms" in PLC Development Manual for the details.
(*2) Processing cycle of the high-speed ladder (sequence program) depends on the machine type.
IB-1501667-B
Operation
Number of points allocated  Stores the number of points currently set for
for X each device
(Note that number of allocated points does not
Number of points allocated
always equal to the usable number of points.)
for Y
SD290: Number of points allocated for X
Number of points allocated
SD291: Number of points allocated for Y
for M
SD292: Number of points allocated for M
:
SD293: Number of points allocated for L
SD294: Number of points allocated for B
Number of points allocated
SD295: Number of points allocated for F
for D
SD296: Number of points allocated for SB
Number of points allocated
SD297: Number of points allocated for V
for W
SD298: Number of points allocated for S
Number of points allocated
SD299: Number of points allocated for T
for SW
SD300: Number of points allocated for ST
SD301: Number of points allocated for C
SD302: Number of points allocated for D
SD303: Number of points allocated for W
SD304: Number of points allocated for SW
Count Nos. of 1 second unit  After RUN, "1" is added every second of the
medium speed ladder.
 Count is repeated as follows.
0 -> 32767 -> -32768 -> 0 (decimal)
0 -> FFFF -> 0 (hexadecimal)
2n-second clock unit  Stores the n of 2n-second clock (SM414). (De-
fault value: 30)
 The setting range is from 1 to 32767.
Count Nos. by 1 scan  After RUN, "1" is added every 1 scan of the
medium speed ladder.
 Count is repeated as follows.
0 -> 32767 -> -32768 -> 0 (decimal)
0 -> FFFF -> 0 (hexadecimal)
Count Nos. by 1 scan  After RUN, "1" is added every 1 scan of the
high speed ladder.
 Count is repeated as follows.
0 -> 32767 -> -32768 -> 0 (decimal)
0 -> FFFF -> 0 (hexadecimal)
Current scan time  Stores the medium speed ladder current scan
(1ms unit) time in SD520 and SD521. (1μs unit is used
for measurement)
Current scan time
SD520: ms value is stored (Storage range: 0
(1μs unit)
to 14000)
SD521: µs value is stored (Storage range: 0 to
999)
 (Example) When the current scan time is 23.6
ms, it is stored as follows.
SD520=23, SD521=600
Minimum scan time  Stores the minimum value of the medium
(1ms unit) speed ladder scan time in SD524 and SD525.
(1μs unit is used for measurement; 2nd scan
Minimum scan time
and after is the target after RUN.)
(1μs unit)
SD524: ms value is stored (Storage range: 0
to 14000)
SD525: µs value is stored (Storage range: 0 to
999)
Maximum scan time  Stores the maximum value of medium speed
(1ms unit) ladder scan time in SD526 and SD527. (1μs
unit is used for measurement; 2nd scan and
Maximum scan time
after is the target after RUN.)
(1μs unit)
SD526: ms value is stored (Storage range: 0
to 14000)
SD527: µs value is stored (Storage range: 0 to
999)
38
Setting side
Details
(Set time)
System side
(Initial)
System side
(At high
speed ladder
processing)
(*2)
User side
System side
(Every time
END)
System side
(Every time
END)
System side
(Every time
END)
System side
(Every time
END)
System side
(Every time
END)