App
- 14
Appendix 2 Special Register List
APPENDICES
TableApp.12 Special register
Number
Name
Meaning
Explanation
Set by
(When set)
Corresponding
CPU
SD250
Loaded
maximum I/O
Loaded maximum
I/O No.
• The upper 2 digits of the final I/O number plus 1 of the
modules loaded are stored as BIN values.
S (Initial)
QS
SD254
CC-Link IE
controller
network,
MELSECNET
/H information
Number of
modules mounted
• Indicates the number of mounted CC-Link IE controller
network or MELSECNET/H modules.
S (Initial)
SD255
I/O number
• Indicates the I/O number of mounted CC-Link IE controller
network or MELSECNET/H module.
SD256
Network number
• Indicates the network number of mounted CC-Link IE
controller network or MELSECNET/H module.
SD257
Group number
• Indicates the group number of mounted CC-Link IE controller
network or MELSECNET/H module.
SD258
Station number
• Indicates the station number of mounted CC-Link IE controller
network or MELSECNET/H module.
SD290
Device
assignment
(Same as the
parameter
setting)
Number of points
assigned for X
• Stores the number of points currently set for X devices
S (Initial)
SD291
Number of points
assigned for Y
• Stores the number of points currently set for Y devices
SD292
Number of points
assigned for M
• Stores the number of points currently set for M devices
SD294
Number of points
assigned for B
• Stores the number of points currently set for B devices
SD295
Number of points
assigned for F
• Stores the number of points currently set for F devices
SD296
Number of points
assigned for SB
• Stores the number of points currently set for SB devices
SD297
Number of points
assigned for V
• Stores the number of points currently set for V devices
SD299
Number of points
assigned for T
• Stores the number of points currently set for T devices
SD300
Number of points
assigned for ST
• Stores the number of points currently set for ST devices
SD301
Number of points
assigned for C
• Stores the number of points currently set for C devices
SD302
Number of points
assigned for D
• Stores the number of points currently set for D devices
SD303
Number of points
assigned for W
• Stores the number of points currently set for W devices
SD304
Number of points
assigned for SW
• Stores the number of points currently set for SW devices
SD340
Ethernet
information
Number of
modules mounted
• Indicates the number of mounted Ethernet modules.
S (Initial)
SD341
I/O number
• Indicates the I/O number of mounted Ethernet module.
SD342
Network number
• Indicates the network number of mounted Ethernet module.
SD343
Group number
• Indicates the group number of mounted Ethernet module.
SD344
Station number
• Indicates the station number of mounted Ethernet module.
Summary of Contents for MELSEC QS Series
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