Table A.8:Auto Flow Control & Master/Slave Mode - Advantech GX2-400 User Manual

RS-485 Auto Flow Control and RS-422 Master/Slave Mode Selection
You set the "Auto Flow Control" mode of RS-485 or "Master/Slave"
mode of RS-422 by using SW2 DIP switches for each RS-422/485 port.
In RS-485, if the switch is set to "Auto", the driver automatically senses
the direction of the data flow and switches the direction of transmission.
No handshaking is necessary.
In RS-422, if DIP switch is set to "On," the driver is always enabled, and
always in high or low status.
Table A.8: Auto Flow Control & Master/Slave Mode
SW2 DIP Switch Setting Description
1
2
1
2
1
2
1
2
UNO-2059E User Manual
COM3 RS-485: Auto flow control; RS-422: Slave mode
On
COM4 RS-485: Auto flow control; RS-422: Slave mode
COM3 RS-485: N/A; RS-422: Master mode
On
COM4 RS-485: Auto flow control; RS-422: Slave mode
COM3 RS-485: Auto flow control; RS-422: Slave mode
On
COM4 RS-485: N/A; RS-422: Master mode
On
COM3 RS-485: N/A; RS-422: Master mode
COM4 RS-485: N/A; RS-422: Master mode
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