4-2.P/W PC Link
30
Allocating the area for P/W PC Link
• Each PC Link Area(P/W PC LINK 0 and P/W PC LINK 1) should be allocated its own areas(relay and data
link areas) as a separate send area and receive area.
• The send area addresses in each memory cell should not be overlapped in the same network.
If the send area addresses overlap each other in the same network, an error will occur.
[Memory cell allocation example for P/W PC LINK 0]
[Memory cell allocation example in one network]
Word
address
Word relative
address
Address
Relative
address
Link relays(L)
L0 0
L63 63
LD0 0
LD127 127
20
40
60
40
70
90
Link data registers(LD)
Receive area
Send area
Receive area
Internal relay
Receive area
Send area
Receive area
Internal data registers
• The data in the “Send 1” area is transferred to the “Receive 1” area in stations 02, 03 and 04.
• The data in the “Send 2” area is transferred to the “Receive 2” area in stations 01, 03 and 04.
• The data in the “Send 3” area is transferred to the “Receive 3” area in stations 01, 02 and 04.
• There is no send area in the sation number 04(UNIT NO. 04) in this network.
• Send and receive area settings must be assigned for both the link relays(L) and the link data
registers(LD).
• The send area addresses in each memory map(P/W PC LINK 0/P/W PC LINK 1) should not be over-
lapped in the same network. If the send area relative addresses overlap in the same network, an error will
occur. Be sure to allocate non-overlapping the send areas.
Send 1
Receive 2
Receive 3
Receive 1
Send 2
Receive 3
Receive 1
Receive 2
Send 3
Receive 1
Receive 2
Receive 3
Station number 01
(UNIT NO.01)
Station number 02
(UNIT NO.02)
Station number 03
(UNIT NO.03)
Station number 04
(UNIT NO.04)
Station number 01
(UNIT NO.01)
Station number 02
(UNIT NO.02)
Send
Send
Receive
Receive
Receive
Send area overlap will cause an error
Do not allow this to happen.
