Mitsubishi Electric Melsec A Series - Page 101

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REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)
2
: Compatible, : Partial change required, × : Incompatible
Special relay in the case of MELSECNET (II)
master station
Corresponding MELSECNET/H special relay
Number Name Description Number Name Description
Compat-
ibility
Precautions for
replacement
M9226 Reverse loop error
OFF : Normal
ON : Abnormal
SB0090 Host loop status
OFF : Normal
ON : Abnormal
When ON, confirm the
loop status by SW0090.
The loop status can
also be judged by the
host station bits of
SW0095 to SW0098.
SB0096
(when host
station is
remote
master
station)
Reverse loop
status of the
remote master
station
OFF : Normal
ON : Abnormal
M9227 Loop test status
OFF : Not being
executed
ON : Forward loop
test/reverse
loop test
execution
underway
SB00AC
Offline test
instruction status
OFF : Not instructed
ON : Instructed
M9232
Local station
operation status
OFF : RUN or STEP
RUN status
ON : STOP or PAUSE
status
SB0084
Each station CPU
RUN status
OFF : All stations
RUN or STEP
RUN status
ON : Stations in the
STOP or
PAUSE status
exist
M9233
Local station error
detection status
OFF : No error
ON : Error detection
None - -
Can be substituted by
SB0074.
M9235
Local station,
remote I/O station
parameter error
detection status
OFF : No error
ON : Error detection
SB007C
Parameter status
of each station
OFF : No station
detected
parameter
errors
ON : A station
detected
parameter
errors
M9236
Local station,
remote I/O station
initial
communications
status
OFF : No
communication
ON : Communication
in progress
SB0078
Parameter status
of each station
OFF : Parameter
communication
not in progress
ON : Parameter
communication
in progress
M9237
Local station,
remote I/O station
error
OFF : Normal
ON : Abnormal
SB0074
Cyclic transmission
status of each
station
OFF : All stations
normal
ON : Station where
cyclic
transmission is
not executing
exist
M9238
Local station,
remote I/O station
forward/reverse
loop error
OFF : Normal
ON : Abnormal
SB0091
Forward loop
status
OFF : All stations
normal
ON : Faulty station
present
SB0095
Reverse loop
status
OFF : All stations
normal
ON : Faulty station
present