Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 451

APPENDICES
No. Name
SB005D I/O master station
(93) (Block 2)
SB0064 Reserved station
(100) designation
SB0068
Communication mode
(104)
SB0069 Multiplex transmission
(105) designation
3
Multiplex transmission
SB006A
status
(106)
3
Multiplex remote function
SB006B
designation
(107)
3
Baton pass status of each
SB0070
station
(112)
3
Baton pass status of the
SB0071
remote master station
(113)
3 Remote sub-master
SB0072 station transient
(114) transmission status
3
Cyclic transmission status
SB0074
of each station
(116)
3: Valid only when the SB0047 is off. When it turns on (error), the last data are retained.
App - 12
Table 3 Link special relay (SB) list (continued)
Description
Indicates the I/O master station setting (Common parameter
setting) of block 2. (Valid when SB0049 is OFF)
Off: No setting
On: Setting exists. (Station No. is stored in SW005D.)
Indicates whether or not the station is reserved. (Valid when the
SB0049 is off.)
Off: No reserved station
On: Reserved station exists
If a reserved station is found, the status of each station can be
checked by Reserved station designation (SW0064 to SW0067).
Depending on the timing of the link refresh, Reserved station
designation (SW0064 to SW0067) and the update may be offset
by one sequence scan.
Indicates the link scan mode (status of supplementary settings of
the common parameters).
(Valid when the SB0049 is off.)
Off: Normal mode
On: Constant link scan mode
Indicates the transmission designation status (status of
supplementary settings of the common parameters).
(Valid when the SB0049 is off.)
Off: Normal transmission designation
On: Multiplex transmission designation
Indicates the transmission status.
Off: Normal transmission
On: Multiplex transmission
In the case of multiplex transmission, the status of each station
can be checked in Multiplex transmission status (1) (SW00B0 to
SW00B3) and (2) (SW00B4 to SW00B7).
Indicates the status of designating the multiplex remote function.
Off: Not designated.
On: Designated.
Indicates the baton pass status of each station. (Not applicable to
reserved stations and the station with the maximum station
number or higher)
Off: All stations normal
On: Faulty station exists
When any faulty station exists, each station status can be
checked in Baton pass status of each station (SW0070 to
SW0073).
Depending on the timing of the link refresh, Baton pass status of
each station (SW0070 to SW0073) and the update may be offset
by one sequence scan.
Indicates the baton pass status of the master station. (Including
when there is an online loop test.)
Off: Master station baton pass normal.
On: Master station baton pass error.
Indicates the transient transmission status of the remote sub-
master station.
Off: Normal
On: Abnormal
Indicates the cyclic transmission status of each station. (Not
applicable to reserved stations and the station with the maximum
station number or higher)
Off: All stations are executing data linking
On: Stations that are not executing data linking exist
When any non-executing station exists, each station status can
be checked in Cyclic transmission status of each station
(SW0074 to SW0077).
Depending on the timing of the link refresh, Cyclic transmission
status of each station (SW0074 to SW0077) and the update may
be offset by one sequence scan.
Use permitted/prohibited
Control Normal
station station
Loop Bus Loop Bus
[Availability column] Loop: optical loop, Bus: coaxial/twisted bus
MELSEC-Q
Remote
Remote I/O
master
station
station
Loop Bus Loop Bus
: Available, : Not available
App - 12