Amplicon Liveline PC27E, Инструкция по эксплуатации

Страница: 9 / 24

PC27E Page 9
4. USER SETTINGS
4.1 Board Base Address
The PC27E can have its base address situated within the range Hex000 to HexFF0. This
feature provides the flexibility to avoid any contention in I/O mapping that may arise with some
clones and allows the use of multiple cards fitted in the PC expansion slots.
4.1.1 Factory Setting
The board’s base address is set at the factory to be Hex300.
4.1.2 Customer Configured Base Address
The board’s base address can be selected as any sixteenth address within the range Hex000
to HexFF0 by means of the appropriate settings of switch SW1. This switch bank comprises
a row of eight single pole single throw switches with each ‘up’ or ‘ON’ position selecting a
logic 0, and each ‘down’ or ‘OFF’ position selecting a logic 1. The most significant hex digit is
coded by the four most left switches and the middle hex digit is coded by the four most right
switches of SW1.
Figure 1 below shows SW1 with the factory setting of Hex300.
Most significant digit 0011 = Hex3
Middle digit 0000 = Hex0
Least significant Default = Hex0
!""#$%"
FIG. 1 SW1 D.I.L SWITCH SELECTION FOR BASE ADDRESS
4.2 Input/Output Address Space used by the PC27E
The I/O Addresses of all the port registers used by the PC27E are shown in Table 1, where
BA is the base address of the board (factory configured to HEX300).