PCI 1 Port RS422/485
Software Setup
Chapter 3 Page 46
options may be selected:
•
Off (Default) - This will turn off automatic flow
control. (If you have no data transfer problems then
selecting this option is fine.)
•
RTS/CTS - This will use the RTS and CTS lines
for automatic hardware flow control.
7. 485 Mode offers the options:
•
Half Duplex / Full Duplex(default) - are used in
conjunction with the RS485 Multiplex Jumper
Settings.
NOTE: These software settings must match the
RS485 Multiplex Jumper configuration, as
described in the section "RS485 Multiplex Jumper
Settings" in Chapter 2, to ensure accurate and error
free data transmission.
•
CTS Hold True, determines whether the CTS
handshake signal is INPUT from the external serial
device or is permanently forced true on the card.
The serial ports own RTS OUTPUT handshake
signals are always taken out to the serial port
connector.
8. Restore - when this button is clicked the settings in the
current window will be reset to the default values of:
Enable FIFO:
On (Checked)
Extend FIFO:
Off (Unchecked)
Receive Buffer:
3
rd
from left.
Transmit Buffer:
16
Automatic Hardware
flow Control:
Off
485
Mode:
Full
duplex.
