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Chapter 3
Serial Communications
1.
1 : 1 Connection .............................................................................................................. 3-1
1 : 1 Connection........................................................................................................................... 3-1
Wiring........................................................................................................................................... 3-2
V-SFT Setting .............................................................................................................................. 3-4
2.
1 : n Connection (Multi-drop)........................................................................................... 3-9
1 : n Connection........................................................................................................................... 3-9
Wiring (RS-422/485) .................................................................................................................... 3-9
V-SFT Setting ............................................................................................................................ 3-10
Notes on Communication Errors................................................................................................ 3-10
3.
n : 1 Connection (Multi-link 2)........................................................................................ 3-11
Multi-link 2 .................................................................................................................................. 3-11
Wiring......................................................................................................................................... 3-12
V-SFT Setting ............................................................................................................................ 3-14
Communication Error ................................................................................................................. 3-15
4.
n : 1 Connection (Multi-link)........................................................................................... 3-16
Multi-link..................................................................................................................................... 3-16
Wiring......................................................................................................................................... 3-17
V-SFT Setting ............................................................................................................................ 3-18
5.
Universal Serial Communications ................................................................................. 3-20
Universal Serial Communications .............................................................................................. 3-20
6.
V-Link ............................................................................................................................ 3-21
V-Link......................................................................................................................................... 3-21
Wiring......................................................................................................................................... 3-22
V-SFT Setting ............................................................................................................................ 3-24
Protocol...................................................................................................................................... 3-25
NAK: Error Codes ...................................................................................................................... 3-29
1-byte Character Code List ........................................................................................................ 3-30
7.
PLC2Way ...................................................................................................................... 3-31
PLC2Way................................................................................................................................... 3-31
Limitations on Connection at the MJ Port .................................................................................. 3-32
PLCs Compatible with PLC2Way Connection at MJ Port.......................................................... 3-32
Wiring......................................................................................................................................... 3-33
V-SFT Setting – System Setting ................................................................................................ 3-35
V-SFT Setting – When the temperature control network/PLC2Way table is used:.................... 3-38
Indirect Memory Designation ..................................................................................................... 3-45
User Log Read for YOKOGAWA’s PLC..................................................................................... 3-46
Processing Cycle ....................................................................................................................... 3-47
Notes on Screen Data Transfer ................................................................................................. 3-48
System Memory ......................................................................................................................... 3-49
8.
Temperature Control Network ....................................................................................... 3-52
Temperature Control Network.................................................................................................... 3-52
