Special Link Relays/Resisters (Sb,Sw) Relating To The Standby Master Function - Mitsubishi A1SJ61BT11 User Manual

15 FUNCTIONS (FUNCTION VERSION B OR LATER)

15.5.3 Special link relays/resisters (SB,SW) relating to the standby master function

Table 15.4 List of link special relays relating to the standby master function
Number Name
SB0001 Master station switch data
(5E0 , b1) link start
H
Master station switch data
SB0042
link start acceptance
(5E4 , b2)
H
status
SB0043 Master station switch data
(5E4 , b3) link start complete status
H
SB0070 Master station data link
(5E7 , b0) status
H
SB0071 Standby master station
(5E7 , b1) information
H
Table 15.5 List of link special registers relating to the standby master function
Number Name
SW0043 Master station switch data
(643 ) link start result
H
SW0073 Standby master station
(673 ) number
H
The special link relays and special link registers relating to the standby master function
are explained.
They are stored in the buffer memory.
(1) Special link relays (SB)
The special link relays (SB) relating to the standby master function are as follows.
The figures in parentheses in the number column indicate buffer memory
address and bit location.
Example: When buffer memory address is 5E0
Switches the output information from the standby master
station to the master station to start the data link.
OFF : No request
ON : Request
Indicates the acceptance status specified for switching data
link start from the standby master station to the master station.
OFF : Not accepted
ON : Accepted
Indicates the acceptance complete status specified for
switching data link start from the standby master station to the
master station.
OFF : Not completed
ON : Completed
Indicates the data link status.
OFF : Data link by the master station
ON : Data link by the standby master station
Indicates whether there is standby master station or not.
OFF : No
ON : Yes
(2) Special link registers (SW)
The special link registers (SW) relating to the standby master function are as
follows.
The figures in parentheses in the number column indicate buffer memory
address.
Stores the results of execution of the master station switch
data link start instruction by SB0001.
0 : Normal
Other than 0 : Stores error code (Refer to Section 13.3)
Stores the standby master station number.
1 to 63 (stations)
Description
Description
15 - 8
MELSEC-A
and bit location is 0: (5E0
H
Availability
( : available, : not available)
Standby master
Master station
Availability
( : available, : not available)
Standby master
Master station
, b0)
H
station
station