Mitsubishi MELSEC-Q Series User Manual page 81

4 FUNCTIONS
Table 4.5 List of link special relays relating to the standby master function (2/2)
Number
SB005D Forced master switching
(5E5 , b13) request complete
H
SB0062 Host standby master
(5E6 , b2) station setting information
H
SB0070
Master station information
(5E7 , b0)
H
SB0071 Standby master station
(5E7 , b1) information
H
SB0079 Master station return
(5E7 , b9) specification information
H
SB007B Host master/standby
(5E7 , b11) master operation status
H
Table 4.6 List of link special registers relating to the standby master function
Number
Refresh instruction at
SW0043
standby master switching
(643 )
H
result
SW005D Forced master switching
(65D ) instruction result
H
SW0073 Standby master station
(673 ) number
H
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Name
Indicates whether a forced master switching request
acknowledgement is complete or not.
0: Not complete
1: Switching complete
Indicates whether or not the standby master station setting exists
for the host.
0: No setting
1: Setting exists
Shows the data link status.
0: Data link control by the master station
1: Data link control by the standby master station
Indicates whether or not there is a standby master station.
0: No standby master station
1: Standby master station exists
Indicates whether the "Type" setting in the network parameters is
set to "Master station" or "Master station (Duplex function)."
OFF: Master station
ON: Master station (Duplex function)
Indicates whether the host operates as the master or standby
master station.
OFF: Operates as a master station (controlling data link)
ON: Operates as a standby master station (standby)
(b) Link special registers (SW)
The following describes the link special registers (SW) relating to the
standby master function. The figures in parentheses in the number column
indicate buffer memory addresses.
Name
Indicates the execution result of refresh instruction at standby
master switching.
0 : Normal
Other than 0: Stores the error code (see Section 13.3).
Stores the execution result of the forced master switching
instruction with SB000C.
0 : Normal
Other than 0: Stores the error code (see Section 13.3).
Stores the station number of the standby master station.
1 to 64 (station)
Description
Description
MELSEC-Q
Applicability
( : Applicable, : Not applicable)
Master
Local station Offline
station
Applicability
( : Applicable, : Not applicable)
Master
Local station Offline
station
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