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