Mitsubishi Electric MELSEC-A Series Manual page 104

2
REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)
(3) Master station special register
Special register enabled when host station is the master station.
Special register in the case of MELSECNET (II)
master station
Number Name
LRDP processing
D9200
results
LWTP processing
D9201
results
D9202
D9203
Local station link
D9241
type
D9242
D9204 Link status
Station
D9205 implementing
loopback
Station
D9206 implementing
loopback
D9207
D9208 Link scan time
D9209
D9210 Retry
2
- 67
Description Number
0: Normal completion
2: LRDP instruction
setting fault
3: Error at relevant
None
station
4: Relevant station
LRDP execution
disabled
0: Normal completion
2: LWTP instruction
setting fault
3: Error at relevant
None
station
4: Relevant station
LRDP execution
disabled
Stores whether or not
the slave station is a
MELSECNET
None
compatible station or a
MELSECNET II
compatible station.
0: Forward loop,
during data link
1: Reverse loop,
during data link
2: Loopback
implemented in
forward/reverse SW0049
directions (SW0090
3: Loopback to
implemented in SW009A)
only forward
direction
4: Loopback
implemented only
in reverse direction
5: Data link disabled
Station that
implemented forward SW0099
loopback
Station that
implemented reverse SW009A
loopback
Max. value SW006B
Min. value SW006C
Current value SW006D
SW00C8
Stored as cumulative
value
SW00C9
: Compatible,
MELSECNET/H special register
Name Description
- -
- -
- -
0: Normal
1: Stop instruction
issued
2: No common
parameters
Cause of data link
3: Common
transmission stop
parameter error
4: Host station
CPU error
6: Communication
canceled
Stores the number
Loopback station of stations executing
(forward loop side) the loopback on the
forward loop side.
Stores the number
Loopback station of stations executing
(reverse loop side) the loopback on the
reverse loop side.
Max. value
Link scan time Min. value
Current value
Accumulates and
Number of retries
stores the number of
on the forward loop
retries on the
side
forward loop side.
Accumulates and
Number of retries
stores the number of
on the reverse loop
retries on the
side
reverse loop side.
: 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.)
Delete when used in a
sequence program due
to MELSECNET/H
system.
Check whether or not
the data link is normally
SW0049.
(Loop status is judged
comprehensively by
SW0090 to SW009A.)
The retries on the
forward loop side are
stored as a cumulative
value.
The retries on the
reverse loop side are
stored as a cumulative
value.
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