FX2N-M485-BD Modbus 通訊介面模組 update : 2012/08/22

特點:


將 FX2N PLC 通訊格式,轉換為 Modbus 通訊格式,以達到多台 PLC 相互
連結,及整合所有Modbus 裝置。


Support MODBUS slave station protocols.
Function code 3 to 10 are supported.
Two transmission modes of RTU..

選購型號

Pin Assignments: Specifications:

Pin
Function
1
TR+
2
TR-
5
SG
Item
Specifications
 Interface
 RS-485
 Transmission mode
 Half-duplex
 Protoco
 Modbus RTU mode
 Transmission speed
 300......115200 bps 
 Data bits
 7 / 8
 Parity check
 Even / Odd / None
 Stop bit
 1 / 2
 Function code
 03 / 04 / 06 / 08 / 10
 Time out
 Character and character 3msec

MODBUS functions: Register range:
Code
Function
03
 Read holding register
04
 Read input register
06
 Preset single register
08
 Loopback test
10
 Force multiple register
 
MODBUS
FX2N
D0000
D0001
......
......
......
......
......
......
7999
D7999

FX2N PLC 暫存器設定
 D8120 = k0   D7901 = 0 ( Modbus 有效起始位址 0 ~ 7899 )
 D7900 = 通訊參數設定    D7902 = 7899 ( Modbus 有效結束位址 0 ~ 7899 )
  bit3 ~ bit0 : Modbus   D7903 = 20( Modbus 長度限制 1 ~ 20 )
     0 = 7, odd, 1 1 = 7, even, 1  
     2 = 8, none, 1 3 = 7, odd, 2  
     4 = 7, even, 2 5 = 8, odd, 1  
     6 = 8, even, 1 7 = 8, none, 2  
     8 = 7, none, 2    
  bit7 ~bit4 : Modbus 通訊速率
     0 = 115200 1 = 57600  
     2 = 38400 3 = 19200  
     4 = 9600 5 = 4800  
     6 = 2400 7 = 1200  
     8 = 600 9 = 300  
   bit15 ~bit8 : Modbus 站號 (0~255)  
   例:D7900 = h0142 (站號 01)
           (9600, 8, n ,1)
 

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