MEWNET-W Mode
FP2 Multi-wire Link Unit
4-10
4.2 PC Link
4.2.5 Precautions When Allocating Link Areas
If a mistake is made when allocating a link area, be aware that an error will result, and
communication will be disabled.
Avoid overlapping send areas
When sending data from a send area to the receive area of another programmable con-
troller, there must be a link relay and link register with the same number in the receive
area on the receiving side. In the example shown below, there is an area between No.
2 and No. 3 which is overlapped, and this will cause an error, so that communication
cannot be carried out (the ERR. LED will blink).
Example of link relay allocations
Send area
Receive
area
Receive
area
Send area
Receive
area
Receive
area
Send area
Overlap
Unit No.1 Unit No.2 Unit No.3
System register Settings for the various units
No. Setting contents for PC link 0 No.1 No.2 No.3
40 Link relay range 64 64 64
42 Starting no. for link relay transmission 0 20
30
43 Link relay transmission size 20
20
34
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