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MELSEC-Q
7 APPLICATION FUNCTIONS
(d) Link special relay and link special registers used to make the programs
identical
The following link special relay and link special registers can be used to
check the send/receive device ranges of the multiplexed remote master
station and multiplexed remote sub-master station.
Number Name Description
SB01CB
Send/receive device
number valid/invalid
status
Indicates whether the send/receive device numbers (SW01C8 to SW01CF) of the remote sub-master
station are valid or invalid.
OFF : Invalid
ON : Valid
SW01CC
Send LB device
number
For the remote master station: The send LB device number to the remote sub-master station is stored.
For the remote sub-master station: The send LB device number to the remote master station is stored.
SW01CD
Receive LB device
number
For the remote master station: The receive LB device number from the remote sub-master station is
stored.
For the remote sub-master station: The receive LB device number from the remote master station is
stored.
SW01CE
Send LW device
number
For the remote master station: The send LW device number to the remote sub-master station is stored.
For the remote sub-master station: The send LW device number to the remote master station is stored.
SW01CF
Receive LW device
number
For the remote master station: The receive LW device number from the remote sub-master station is
stored.
For the remote sub-master station: The receive LW device number from the remote master station is
stored.
The SW01CC to SW01CF values are valid only when SB01C8 is ON.
In this example, the following values are stored into the corresponding link
special registers.
Target Station SW01CC SW01CD SW01CE SW01CF
Multiplexed remote master station 0 20 100 120
Multiplexed remote sub-master station 20 0 120 100
Using the above values, the multiplexed remote master station and
multiplexed remote sub-master station can confirm the starting addresses
of the LB/LW devices sent/received by themselves.