Transient Instructions - Mitsubishi Electric MELSEC-A Series Manual

2
REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)
(2) Local station special relay
Special relays enabled when host station is the local station.
Special relay in the case of MELSECNET (II) local
Number Name
LRDP instruction
M9204
complete
LWTP instruction
M9205
complete
Link card error (for
M9211
local station)
M9240 Link status
M9241 Forward loop error
M9242 Reverse loop error
Loopback
M9243
execution
Data not received
M9246
from master station
Data not received
M9247 from the upper loop
in 3-tier system
Parameter
M9250
unreceived
M9251 Link break
M9252 Loop test status
2
- 65
station
Description Number
OFF : Not completed
None
ON : Completed
OFF : Not completed
None
ON : Completed
OFF : Normal
SB0020
ON : Abnormal
OFF : Online
ON : Offline, station-
to-station test, SB0043
or self-loopback
test
OFF : Normal
SB0090
ON : Abnormal
OFF : Normal
SB0090
ON : Abnormal
OFF : Loopback not
executed
SB0090
ON : Loopback
execution
OFF : Received
None
ON : Not received
OFF : Received
None
ON : Not received
OFF : Received
SB0054
ON : Not received
OFF : Normal
SB0049
ON : Cancel
OFF : Not being
executed
ON : Forward loop
test/reverse SB00AE
loop test
execution
underway
: Compatible,
MELSECNET/H special relay
Name Description
- -
- -
OFF : Normal
Module status
ON : Abnormal
OFF : Online
Online switch ON : Other than
online
OFF : Normal
Host loop status
ON : Abnormal
OFF : Normal
Host loop status
ON : Abnormal
OFF : Normal
Host loop status
ON : Abnormal
- -
- -
OFF : Receive
Parameter receive
completed
status
ON : Not received
Host station data OFF : Normal
link status ON : Abnormal
Offline testing
OFF : No response
response
ON : Response
designation
: Partial change required, × : Incompatible
Compat- Precautions for
ibility replacement
Delete when used in a
sequence program.
(Refer to Section 2.6.2

Transient instructions.)

Delete when used in a
sequence program.
(Refer to Section 2.6.2
Transient instructions.)
When ON, confirm the
loop status by SW0090.
The loop status can
also be judged by the
host station bits of
SW0091 to SW0094.
When ON, confirm the
loop status by SW0090.
The loop status can
also be judged by the
host station bits of
SW0095 to SW0098.
When ON, confirm the
loop status by SW0090.
The loop status can
also be judged by
whether SW0099 and
SW009A are the host
station No.
Delete when used in a
sequence program as a
3-tier system cannot be
configured.
Delete when used in a
sequence program as a
3-tier system cannot be
configured.
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