9.
PROGRAMMING
Device
Name
Number
LRDP execution
D9200
result
LWTP execution
D9201
result
D9202
Local station link
type
D9203
D9204
Link status
Table 9.6 List of MELSECNET/B special link registers
Data
0 : Normal
2 : LRDP instruction setting
fault
3 : Corresponding station
error
4 : LRDP can be executed in
the corresponding station
0 : Normal
2 : LWTP instruction setting
fault
3 : Corresponding station
error
4 : LWTP cannot be
executed in the
corresponding station
Stores the status of
No.1 to No.16
Stores the status of
No.17 to No.31
0 : Data link
5 : Data link impossible
9 - 20
Description
Stores the execution result of an LRDP (word device read)
instruction (M9201 ON).
• LRDP instruction setting
fault: ...................................... Faulty setting of the LRDP
• Corresponding station error: . The designated station is not
• LRDP cannot be executed in
the corresponding station:..... As the station designated with the
Stores the execution result of an LWTP (word device write)
instruction (M9203 ON).
• LWTP instruction setting
fault: ...................................... Faulty setting of the LWTP
• Corresponding station error: . The designated station is not
• LWTP cannot be executed in
the corresponding station:..... As the station designated with the
Stores whether a slave station is compatible with the MELSECNET
mode or MELSECNET
mode.
• MELSECNET -compatible station : "1"
• MELSECNET-compatible station : "0"
Stores the current path of the data link.
(1) Forward loop
• "5" is stored because the watchdog timer setting is too small.
• The data in D9204 is updated each time the link status changes.
instruction constant, source, and/or
target
executing data link processing
LRDP instruction, a remote I/O
station is connected. Or the local
station for the QCPU specified by
the LRDP instruction is in STOP
status.
instruction constant, source, and/or
target
executing data link processing
LWTP instruction, a remote I/O
station is connected. Or the local
station for the QCPU specified by
the LWTP instruction is in STOP
status.