UNO-2050E User Manual
32
Jumper Setting for RS-422/485 Interface: (Default Setting)
Jumper Setting for RS-232 Interface:
RS-485 Auto Flow Control & 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 SW1 DIP switches for each RS-422/485 port.
In RS-485, if the switche 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 switche is set to "On," the driver is always enabled, and
always in high or low status.
Table A.5: Auto Flow&Master/Slave Select
SW1 DIP
Switch Setting
Description
COM3 RS-485: Auto flow control; RS-422: Slave mode
COM4 RS-485: Auto flow control; RS-422: Slave mode
COM3 RS-485: N/A; RS-422: Master mode
COM4 RS-485: Auto flow control; RS-422: Slave mode
COM3 RS-485: Auto flow control; RS-422: Slave mode
COM4 RS-485: N/A; RS-422: Master mode
COM3 RS-485: N/A; RS-422: Master mode
COM4 RS-485: N/A; RS-422: Master mode
1
2
On
1
2
On
1
2
On
1
2
On
