IDEC High Performance Series - Manual (Page 113)

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Con
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External Device Setup Manual
2.4 Environment Settings
2.4.1 MELSEC-A Series: Settings for the Computer Link Unit and CPU Unit Link I/F
Refer to the Link Unit manual for details.
2.4.2 MELSEC-A Series: Connection to the Programming Port or 2-port Adapter
When using CPU Direct for the connection, the PLC program scan time will increase when it starts communicating with the
MICRO/I. Investigate this under your actual operating conditions.
Item Setting
Interface RS232C RS485
Transmission Control Protocol Format 4 protocol mode
Set the mode setting switch to 4. Set the mode setting switch to 8.
Station Number
*1
*1. Set a decimal number for the Station Number.
Use the same settings
as for the MICRO/I. Set using the Station Number setting switch.
Data Bits 7 or 8 (set using the Transmission Specifications setting switch)
Baud Rate 1200, 2400, 4800, 9600 or 19200 bps
(set using the Transmission Specifications setting switch)
Parity None, Even or Odd (set using the Transmission Specifications setting
switch)
Stop Bits 1 or 2 (set using the Transmission Specifications setting switch)
Checksum Yes (set using the Transmission Specifications setting switch)
Write During RUN Possible (set using the Transmission Specifications setting switch)
Transmission Side Termination Resistor No Yes
(set using the Transmission Specifi-
cations setting switch)
Receive Side Termination Resistor No Yes
(set using the Transmission Specifi-
cations setting switch)
Computer Link/Multi Drop Selection Computer Link (set using the Transmission Specifications setting switch)
Note: Only set if this item is present.
Item Setting
Interface RS422
Data Bits Use the same settings as
for the MICRO/I. 8 (fixed)
Baud Rate 9600 (fixed)
Parity Odd (fixed)
Stop Bits 1 (fixed)