Mitsubishi MELSEC-A Series Reference Manual page 253

9. PROGRAMMING
Device
Name
Number
LRDP instruction
M9200
received
LRDP instruction
M9201
completed
LWTP instruction
M9202
received
LWTP instruction
M9203
completed
Link parameter
M9206 error in the host
station
Link parameter
M9207 inconsistency with
the master station
B and W
transmission range
for the master
M9208
station
(lower tier master
stations only)
Link parameter
check instruction
M9209 (lower tier link
master stations
only)
Link card error
M9210
(master station)
M9224 Link status
Table 9.2 MELSECNET/B special link relays list
Data
• Turned ON when an LRDP (word device read) instruction is received.
• Used in a user program as an interlock for an LRDP instruction.
OFF : Unreceived
• Remains ON after the completion of word device read processing called by
ON : Received
an LRDP instruction.
Turned OFF with an RST instruction in a user program.
• Turned ON after an LRDP (word device read) instruction has been
executed. The execution results are stored in D9200.
OFF : Uncompleted • Used as a conditional contact to reset M9200 and M9201 after the
ON : Completed completion of word device read processing called by an LRDP instruction.
• Turned OFF with an RST instruction in a user program after it has been
turned ON.
• Turned ON when an LWTP (word device write) instruction is received.
• Used in a user program as an interlock for an LWTP instruction.
OFF : Unreceived
• Remains ON after the completion of word device write processing called by
ON : Received
an LWTP instruction.
Turned OFF with an RST instruction in a user program.
• Turned ON after an LWTP (word device write) instruction has been
executed. The execution results are stored in D9201.
OFF : Uncompleted
• Used as a conditional contact to reset M9202 and M9203 after the
ON : Completed
completion of word device write processing called by an LWTP instruction.
• Turned OFF with an RST instruction in a user program.
• Turned ON when no link parameter of the host station is set, or any of the
OFF : Normal
settings is incorrect.
ON : Error
• Turned OFF with an RST instruction in a user program.
• Turned ON if a lower tier link uses device ranges (B, W) outside the range
OFF : Normal
that is set to be used by the master station in the upper tier link.
ON : Error
• Check is executed only when M9209 is OFF.
OFF : Send to the
• Sets whether the B and W data controlled by the master station in the upper
second and
tier is sent to the local stations (sub-slave stations) in the lower tier.
third tiers
• OFF : B and W data in the master station is sent to the sub-slave stations.
ON : Send to the
• ON : B and W data in the master station is not sent to the sub-slave
second tier
only
OFF : Check • Turned ON when the link devices (B and W) used by the upper tier and
executed lower tier are not compared for "match".
ON : Check not • When M9209 is OFF, the link parameters for the upper tier and lower tier
executed are checked.
OFF : Normal
• Turned ON when the link card hardware is faulty.
ON : Error
OFF : Offline
ON : Online, • Turned ON when the master station is offline, in the station-to- station test
station-to- mode, or in the self-loopback test mode.
station test, • Turned OFF when the master station is reset after being placed in the
or self- online mode.
loopback test
Description
stations.
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