Operation OEM6 Cards and Enclosure
Chapter 4
OEM6 Family Installation and Operation User Manual Rev 7
43
4.1.1
Serial Ports
The receiver communicates with a computer or terminal via a serial port. For communication to occur,
both the receiver and the operator interface have to be configured properly. The receiver’s default port
settings are as follows:
•
9600 bps, no parity, 8 data bits, 1 stop bit, no handshaking, echo off
The data transfer rate determines how fast information is transmitted. Take for example a log whose
message byte count is 96. The default port settings allows 10 bits/byte (8 data bits + 1 stop bit + 1
framing bit). It therefore takes 960 bits per message. To get 10 messages per second then requires 9600
bps. Please also remember that even if you set the bps to 9600 the actual data transfer rate is lower and
depends on the number of satellites being tracked, data filters in use, and idle time. It is therefore
suggested that you leave yourself a margin when choosing a data rate (115200 bps is recommended for
most applications).
Use the
SERIALCONFIG
command to change settings as required for all OEM6 family receivers.
The following ports are supported and can be configured using the commands listed. Refer to the
commands listed in the
OEM6 Family Firmware Reference Manual
(OM-20000129) for detailed
instructions.
Although the receiver can operate at data transfer rates as low as 300 bps, this is not
desirable. For example, if several data logs are active (that is, a significant amount of
information needs to be transmitted every second) but the bit rate is set too low, data
overflows the serial port buffers, causing an error condition in the receiver status that
results in lost data.
638
Refer to
Section 4.1.1.1, Configure COM 1, 2 and IMUCOM
for OEM638.
Refer to
Section 2.5.3, Connecting Data Communications Equipment
for additional default
setting details.
Table 7: Serial Ports Supported
Receiver Type
Port Supported
Configuration Command
OEM615
COM1, COM2, COM3
SERIALCONFIG
OEM617D
COM1, COM2, COM3
SERIALCONFIG
OEM628
COM1, COM2, COM3
SERIALCONFIG
and
SERIALPROTOCOL
OEM638
COM1, COM2, COM3 and
COM4, COM5, COM6
(COM1, COM2 and COM6 are
configurable RS-422/RS-232)
SERIALCONFIG
and
SERIALPROTOCOL
FlexPak6
COM1, COM2
SERIALCONFIG
and
SERIALPROTOCOL
