Advantech UNO-3072L, User Manual, Page: 23 / 64

15 Chapter 2
2.3.6 IRQ, I/O Address and Transmission Rate Setting
The IRQ and I/O address range of COM3 and COM4 are listed below:
•
COM3: 3E8
H
, IRQ10 (Independent IRQ), IRQ10 (Share IRQ)
• COM4: 2E8
H
, IRQ5 (Independent IRQ), IRQ10 (Share IRQ)
• Vector address for share IRQ: 1D0
H
You can set “Share IRQ” or “Independent IRQ” by the first switch of SW3
(Refer to Table 2.2 below).
Table 2.1: Auto Flow Control and RS-422 Slave/Master Selection
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