569
APPENDICES
A
Appendix 3 List of Special Register Areas
SD1276
Forced
connection
invalidation
Specifies
forced
connection
invalidation.
This register is specified to forcibly invalidate a connection
by a program. After being specified invalid, the connection
stops communication and does not respond. (When a
remote password is used and frequent unlock processing
errors occur on a connection, this register is useful for
temporarily disabling access.)
• 0: Valid (default)
• 1: Disabled
UNew
QnU
*2
LCPU
*1
SD1277
SD1282
Open
completion
signal
Stores open
completion
status
This register stores the open completion status of a socket
communication or predefined protocol connection ("Open
System" parameter: "Socket Communication" or "Predefined
Protocol"). Bits for connections other than that of socket
communication or predefined protocol are always "0".
• 0: Open processing is not completed.
• 1: Open processing is completed.
S (Status
change)
New
QnU
*2
LCPU
*1
SD1284
Open request
signal
Stores open
request
status
This register stores the open request status of a socket
communication or predefined protocol connection. Bits for
connections other than that of socket communication or
predefined protocol are always "0".
• 0: No open request
• 1: In open request
S (Status
change)
New
QnU
*2
LCPU
*1
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
ACPU
D9
Corresponding
CPU
b15b14
b0b1
SD1276
SD1277
b15b14b13b12
b4 b3 b2 b1 b0
000 0
Connection 1
Direct connection to
MELSOFT
MELSOFT
communication port
(TCP/IP)
FTP
communication port
to
to
MELSOFT
communication port
(UDP/IP)
to
Connection 16
Connection 15
Connection 2
b15b14
b0b1
SD1282
Connection 1
to
to
Connection 16
Connection 15
Connection 2
b15b14
b0b1
SD1284
Connection 1
to
to
Connection 16
Connection 15
Connection 2