Filter
Top Products
11 - 85 11 - 85
MELSEC-Q
11 TROUBLESHOOTING
Special Register List
(8) Latch area
Number Name Meaning Explanation
Set by
(When
set)
Corresponding
ACPU
D9
Corresponding
CPU
SD900
Drive where
power was
interrupted
Access file
drive number
during power
loss
• Stores drive number if file was being accessed during power loss.
S (Status
change)
New
SD901
SD902
SD903
SD904
SD905
SD906
File name
active during
power loss
Access file
name during
power loss
• Stores file name (with extension) in ASCII code if file was being
accessed during power loss.
SD901
SD902
SD903
SD904
SD905
SD906
B15 B8 B7 B0
1st character
2nd character
3rd character
4th character
5th character6th character
7th character
8th character
to to
1st character of
extension
2E
H
(.)
2nd character of
extension
3rd character of
extension
S (Status
change)
New
SD910
SD911
SD912
SD913
SD914
SD915
SD916
SD917
SD918
SD919
SD920
SD921
SD922
SD923
SD924
SD925
RKEY input RKEY input
• Stored in sequence that PU key code was entered.
SD910
SD911
SD912
SD913
SD914
SD915
B15 B8 B7 B0
SD916
SD917
SD918
SD919
SD920
SD921
SD922
SD923
SD924
SD925
1st character
2nd character
3rd character4th character
5th character6th character
7th character
8th character
9th character
10th character
11th character
12th character
13th character
14th character
15th character
16th character
17th character
18th character
19th character
20th character
21st character
22nd character
23rd character
24th character
25th character
26th character
27th character
28th character
29th character
30th character
31st character
32nd character
to to
S (During
execution)
New
QnA