Mitsubishi Electric Melsec A Series - 4.6 Program Comparisons; 4.6.1 Comparison of link special relay (SB);link special register (SW)

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REPLACEMENT OF THE MELSECNET/10 (PLC TO PLC NETWORK)
4
4.6.1 Comparison of link special relay (SB)/link special register (SW)
The table below shows only link special relay (SB) and link special register (SW) to be used in interlock
program.
Device name and device No. of MELSECNET/H module are described in link device of internal
MELSECNET/H module.
Changing sequence program should be performed after checking the refreshed device of link device in
refresh parameters.
(1) AnN/AnA/AnSCPU (excluding AnUS(H)CPU)
When MELSECNET/10 module is mounted to the CPU module of the AnN/AnA/AnSCPU (excluding
AnUS(H)CPU), link special relay (SB) and link special register (SW) are assigned to special relay and
special register of CPU module.
For replacing with a MELSECNET/H module, change sequence program in reference to the following.
(a) Link special relay (SB)
: Compatible, : Partial change required, ×: Incompatible
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4.6 Program Comparisons
AnN/AnA/AnSCPU
MELSECNET/10 module
QCPU
MELSECNET/H module
Compat-
ibility
Precautions for replacement
Number Name Description Number Name Description
M9204
LRDP
instruction
complete
OFF : Not completed
ON : Completed
-- -
LRDP instruction cannot be used.
When using it in sequence
program, delete corresponding
part.
M9205
LWTP
instruction
complete
OFF : Not completed
ON : Completed
-- -
LWTP instruction cannot be used.
When using it in sequence
program, delete corresponding
part.
M9211 Module status
OFF : Normal
ON : Abnormal
SB0020 Module status
OFF : Normal
ON : Abnormal
M9240
Online host
status
OFF : Online
ON : Offline, self-
loopback test,
station-to-
station test
SB0043
Online switch
(host station)
OFF : Online
ON : Other than
online
M9241
Forward loop
status
OFF : Normal
ON : Abnormal
SB0090 Host loop status
OFF : Normal
ON : Abnormal
When SB0090 turns on, check
the loop condition with SW0090,
or check by host bit of SW0091 to
SW0094.
M9242
Reverse loop
status
OFF : Normal
ON : Abnormal
SB0090 Host loop status
OFF : Normal
ON : Abnormal
When SB0090 turns on, check
the loop condition with SW0090,
or check by host bit of SW0095 to
SW0098.
M9243
Loopback
status
OFF : Loopback
inexecution
ON : Loopback
execution
SB0090 Host loop status
OFF : Normal
ON : Abnormal
When SB0090 turns on, check
the loop condition with SW0090,
or check by SW0099 or SW009A.
M9246
Data not
received
(Control station)
OFF : Received
ON : Not received
-- -
When using it in sequence
program, delete corresponding
part.
M9250
Parameter
unreceived
OFF : Received
ON : Not received
SB0054
Parameter
receive status
OFF : Receive
completed
ON : Unreceived
M9251
Communication
status
OFF : Normal
ON : Abnormal
SB0049
Host data link
status
OFF : Normal
ON : Abnormal