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APPENDIX
Appendix 2 Special Register List
245
A
System clock
The special registers for system clock are shown below.
R: Read only, R/W: Read/Write
Scan information
The special registers for scan information are shown below.
R: Read only, R/W: Read/Write
Drive information
The special registers for drive information are shown below.
R: Read only, R/W: Read/Write
SD304 R Device Size [Lower] This register stores the number of R device points used as 32-bit
value.
R
SD305 R Device Size [Upper]
No. Name Description R/W
SD412 One second counter • This register is incremented by 1 for each second after the
CPU module is set to RUN.
• A counting cycle from 0 to 32767 to -32768 to 0 is repeated.
R
SD414 2n second clock setting • Stores value n of 2n second clock (Default is 30)
• Setting can be made between 1 and 32767.
R/W
SD415 2nms second clock setting • Stores value n of 2n ms clock (Default is 30)
• Setting can be made between 1 and 32767.
R/W
SD420 Scan counter • This register is incremented by 1 each scan after the CPU
module is set to RUN. (Not incremented for each scan of an
initial execution type program.)
• A counting cycle from 0 to 32767 to -32768 to 0 is repeated.
R
No. Name Description R/W
SD500 Execution program number Program number of program currently being executed is stored. R
SD518 Initial scan time (ms) This register stores the initial scan time (ms). R
SD519 Initial scan time (s) This register stores the initial scan time (s). R
SD520 Current scan time (ms) This register stores the current scan time (ms). R
SD521 Current scan time (s) This register stores the current scan time (s). R
SD522 Minimum scan time (ms) This register stores the minimum scan time (ms). R
SD523 Minimum scan time(s) This register stores the minimum scan time (s). R
SD524 Maximum scan time (ms) This register stores the maximum scan time (ms). R
SD525 Maximum scan time (s) This register stores the maximum scan time (s). R
SD526 END processing time (ms) This register stores the END processing time (ms). R
SD527 END processing time (s) This register stores the END processing time (s). R
SD528 Constant scan waiting time (ms) This register stores the constant scan wait time (ms). R
SD529 Constant scan waiting time (s) This register stores the constant scan wait time (s). R
SD530 Scan program execution time (ms) This register stores the scan program execution time (ms). R
SD531 Scan program execution time (s) This register stores the scan program execution time (s). R
No. Name Description R/W
SD600 Memory Card Installation This register stores the enable/disable classification of the
inserted SD card.
R
SD604 SD memory card usage status This register stores the memory card usage condition. R
SD606 SD memory card capacity This register stores the drive 2 storage capacity (unit: 1 K byte).
(Free space value after formatting is stored.)
R
SD607 SD memory card capacity This register stores the drive 2 storage capacity (unit: 1 K byte).
(Free space value after formatting is stored.)
R
SD608 SD memory card capacity This register stores the drive 2 storage capacity (unit: 1 K byte).
(Free space value after formatting is stored.)
R
No. Name Description R/W