Communication
FP
Σ
User's Manual
182
•
Using the 1-channel RS485 and 1-channel RS232C combination type communication
cassette (FGP-COM4):
5
1
2
3
4
SG
SD
RD
RS
CS
SG
+
-
SD
RD
Left: GT terminal, right: FP
Σ
REFERENCE
Please refer to the "GT Series Technical Manual" for more information.
8.5.6 1:N
Slave Communication
For a 1:N MEWTOCOL-COM connection between a computer and several PLCs, the
computer and the first PLC are connected through a commercially available RS232C-RS485
converter. The other PLCs are wired using an RS485 cable.
The computer and the PLCs communicate via commands and responses: The computer
sends a command specifying the station number, and the PLC with that station number sends
a response back to the computer.
RS232C
RS485
#1
#2
#3
#4
1:N communication between a computer and several PLCs
1
The station number of the PLC to which the command is being sent is included in the command message.
2
The station number of the PLC sending a response is included in the response message.
3
Commercially available converter
#
Station number of PLC
The RS485 port of FPG-COM4 occupies the communication line for a certain period of time
after sending data. During this time, data cannot be received from another device. Therefore,
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 ...