NAiS FP Series User Manual page 216

FPΣ
Tip
Link areas consist of link relays and link registers for PLC link and used with
respective control units.
The link relay which can be used in an area for PLC link is maximum 1,024
points, and the link register is maximum 128 words.
Example of link area allocation
The areas for PLC link is divided into transmitted areas and received areas. The link
relays and link registers are transmitted from the transmitted area to the received area
of a different FPΣ. Link relays and link registers with the same numbers as those on the
transmission side must exist in the received area on the receiving side.
Link relay allocation
FPΣ
(Unit No. 1)
WL0
No.1
Transmitted
area
19
20
No.2
Received area
No.3
63
Figure 209: Example of link area allocation
System register
No. Name
No. 40 Range of link relay used for PLC link
No. 42 Starting no. for link relay transmission
No. 43 Link relay transmission size
FPΣ
(Unit No. 2)
WL0
No.1
Received area
19
20
No.2
Transmitted
area
39
40
No.3
Received area
63
10.2 Communication Parameter Settings
FPΣ
(Unit No. 3)
WL0
No.1
Received area
No.2
39
40
No.3
Transmitted
area
63
Set value of various control unit
No. 1 No. 2
64 64
0 20
20 20
FPΣ
(Unit No. 4)
WL0
Received area
63
No. 3 No. 4
64 64
40 0
24 0
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