FP
Σ
User's Manual
8.7 PLC Link
223
8.7 PLC Link
PLC Link is an economic way of linking PLCs using a twisted-pair cable and the MEWNET
protocol. Data is shared with all PLCs by means of dedicated internal relays called link relays
(L) and data registers called link registers (LD). The statuses of the link relays and link
registers of one PLC are automatically fed back to the other PLCs on the same network. The
link relays and link registers of the PLCs contain areas for sending and areas for receiving
data. Station numbers and link areas are allocated using the system registers.
RS485
#
1
#
4
#
2
#
3
#
1
#
2
#
3
#
1
#
2
#
3
#
1
#
2
#
3
Sharing of data in a PLC link using dedicated send and receive areas
Send area
Receive area
#
Station number of PLC
Summary of Contents for AFPG951T34
Page 7: ......
Page 17: ......
Page 18: ...Chapter 1 Safety Measures ...
Page 21: ......
Page 22: ...Chapter 2 Overview ...
Page 32: ...Chapter 3 CPU Types ...
Page 47: ...CPU Types FPΣ User s Manual 30 LD Body ...
Page 51: ...CPU Types FPΣ User s Manual 34 POU Header and LD Body ...
Page 55: ...CPU Types FPΣ User s Manual 38 LD Body ...
Page 57: ......
Page 58: ...Chapter 4 Expansion ...
Page 73: ......
Page 74: ...Chapter 5 I O Allocation ...
Page 81: ......
Page 82: ...Chapter 6 Installation and Wiring ...
Page 115: ......
Page 116: ...Chapter 7 High Speed Counter and Pulse Output ...
Page 169: ......
Page 170: ...Chapter 8 Communication ...
Page 227: ...Communication FPΣ User s Manual 210 LD Body ST Body ...
Page 233: ...Communication FPΣ User s Manual 216 POU Header LD Body ...
Page 236: ...FPΣ User s Manual 8 6 Program Controlled Communication 219 POU Header LD Body 1 2 ...
Page 237: ...Communication FPΣ User s Manual 220 2 2 ST Body ...
Page 266: ...Chapter 9 Security Functions ...
Page 273: ......
Page 274: ...Chapter 10 Other Functions ...
Page 277: ......
Page 278: ...Chapter 11 Troubleshooting ...
Page 289: ......
Page 290: ...Chapter 12 Appendix ...