Table 2.1: Auto Flow & RS-422 Slave/Masters

SW2 DIP Switch Setting

COM Port

Mode Selections

 

 

 

 

COM3

RS-422: Slave mode

 

 

 

 

 

RS-485: Auto flow control

 

 

 

 

COM4

RS-422: Slave mode

 

 

 

 

 

RS-485: Auto flow control

 

 

 

 

COM3

RS-422: Master mode

 

 

 

 

 

RS-485: N/A

 

 

 

 

COM4

RS-422: Slave mode

 

 

 

 

 

RS-485: Auto flow control

 

 

 

 

COM3

RS-422: Slave mode

 

 

 

 

 

RS-485: Auto flow control

 

 

 

 

COM4

RS-422: Master mode

 

 

 

 

 

RS-485: N/A

 

 

 

 

COM3

RS-422: Master mode

 

 

 

 

 

RS-485: N/A

 

 

 

 

COM4

RS-422: Master mode

 

 

 

 

 

RS-485: N/A

 

 

 

2.3.6IRQ, I/O Address and Transmission Rate Setting

The IRQ and I/O address range of COM3 and COM4 are listed below:

COM3: 3E8H, IRQ10 (Independent IRQ), IRQ10 (Share IRQ)

COM4: 2E8H, IRQ5 (Independent IRQ), IRQ10 (Share IRQ)

Vector address for share IRQ: 1D0H

You can set “Share IRQ” or “Independent IRQ” by the first switch of SW3 (Refer to Table 2.2 below).

15

Chapter2

Page 25
Image 25
Microsoft UNO-3074 user manual 6 IRQ, I/O Address and Transmission Rate Setting, Auto Flow & RS-422 Slave/Masters