Titan Electronics PCIe-800i, Руководство пользователя

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9
HARDWARE AND SOFTWARE SETTINGS
Selecting the Operation Mode
There are eight 3-pin DIP switches, SW1~SW8 on PCIe-800i and PCIe-800i-SI cards. The
DIP switches are used to select the mode of operation. You will need to set the switch
settings to RS-422 mode or RS-485 mode as per the requirements of your application.
The RS-422 & RS-485 mode block configuration settings are listed as follows.
SW1~SW8 for Mode Setting
Operation Mode 1 2 3
RS-422 Full Duplex (4 wire) ON ON ON
RS-485
Full Duplex (4 wire)
OFF
ON ON
Half Duplex (2 wire) – with Echo
OFF OFF
ON
Half Duplex (2 wire) – without Echo
OFF OFF OFF
Note: When PCIe-800i and PCIe-800i-SI are working in RS-485 operation mode, you
need to enable the automatic direction control of the RS-485 transceiver buffer by
setting the driver configuration (refer to page 11).