App
- 16
Appendix 2 Special Register List
APPENDICES
(5) Safety CPU
(6) Memory
TableApp.15 Special register
Number
Name
Meaning
Explanation
Set by
(When set)
Corresponding
CPU
SD560
Safety CPU
operation
mode
Safety CPU
operation mode
• Stores the safety CPU operation mode.
S (Status
change)
QS
SD561
TEST MODE
continuous
RUN time
TEST MODE
continuous
RUN time
(seconds)
• Stores the TEST MODE continuous RUN time. (Measured in
seconds)
(RUN time in TEST MODE. Start measurement when STOP &
RUN (Time when operation is STOP is not included.)
• Stores the measurment valve with the range of 1 to
2147483647.
S (Every END)
SD562
TableApp.16 Special register
Number
Name
Meaning
Explanation
Set by
(When set)
Corresponding
CPU
SD620
Memory type
Memory type
• Indicates the type of built-in memory.
S (Initial)
QS
SD623
Drive 4
(ROM)
capacity
Drive 4 capacity
• Drive 4 capacity is stored in 1 kbyte units.
S (Initial)
b15
b2 b1 b0
00 : SAFETY MODE
01 : TEST MODE
10 : SAFETY MODE
(Wait-for-restart)
to
Empty
b4 b3
b0
0
0
b8 b7
b15
to
to
to
Drive 4
(Standrd ROM)
Fixed at
"3 (FLASH ROM)"
Summary of Contents for MELSEC QS Series
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