Quatech Serial Device Server - Manual (Page 69)

Quatech SDS User’s Manual Configuring the SDS using a Web interface
Step Procedure Description
¾ Force X2 mode
¾ Force X4 mode
¾ Force X8 mode
Note: Forcing a change in the data rate may
cause communication problems with some
serial devices. If this is the case, change the
setting back to Auto (Recommended).
‰
Step 3b Click on the desired Performance
Selector.
Choose balanced mode except in those
cases where the serial device cannot
tolerate the slight delays inherent in
normal TCP/IP operation.
Balanced mode offers excellent performance
for most applications.
Low Latency mode heavily favors
responsiveness over throughput.
‰
Step 3c Set the Heart Beat Time to a value from 1
to 65534 seconds. Default is 45 seconds.
Note: Use a value of 0 to disable the heartbeat
timer.
Heartbeat messages help detect when a
connection has been lost between the PC
driver and the SDS.
If you need quick notification that the
connection has been lost, set this timer to
a shorter value.
If you are more concerned about network
traffic, set this timer to a longer value.
‰
Step 3d Set the Baud Rate. The SDS and the serial device(s) to
which it is attached must use the same
serial connection speed.
‰
Step 3e Set the Parity. Parity can be odd, even, or none.
‰
Step 3f Set the Data Bits. Data Bits can be 7 or 8.
‰
Step 3g Set the Stop Bits. Stop Bits can be 1 or 2.
‰
Step 3h Set the Flow Control. Flow control determines the handshake
method used between the SDS and the
serial device(s) to stop the serial
input/output process.
Steps 4a through 4d apply only to RS-232/422/485 (MEI) units
‰
Step 4a
(MEI only)
Configure the serial port interface.
Click on the desired interface selector. This series of steps only applies to MEI
units, such as the SSE-400.
If you select RS232, the RS422/485
selections will be grayed out. Continue
with
□ Step 5 .
‰
Step 4b
(MEI only)
Click on the desired duplex mode selector. Select Full Duplex to always enable
transmit and receive drivers.
Select Half Rx to only enable the
transmit drivers when the SDS is
transmitting; receivers always enabled.
Select Half Rx Tog to disable receivers
and enable the transmit drivers only
when the SDS is transmitting.
July 2005 940-0183-153 Page 63