Seiwa Si-Tex Vector 3D GPS - Manual (Page 14)

15 13
You may configure Port A or Port C of the GPS receiver to output any combination of data that you want.
Port A can have a different configuration from Port C in terms of data message output, data rates, and the
baud rate of the port. This allows you to configure the ports independently based upon your needs.
The CAN processor that controls Port C is by de au p og ammed n o NMEA 2000 mode. You mus
configure Port C as a serial port to use the 3D with two serial ports. Port A is always a serial port. To
configure Port C as a serial port refer to Table 2-1 on page 14.
Fo example, if you want one generalized port and one heading-only port, you can configure the ports as
follows:
Chapter 2: Installation
Ports
The 3D offers either serial port or NMEA 2000 port functionality.
Serial Ports
The 3D offers position and heading data via two full-duplex (bi-directional) RS-232 serial ports. In addition
to outputting data, these ports are used for firmware upgrades.
Selecting Baud Rates and Message Types
When selecting your baud rate and message types, use the following calculation to determine your baud rate
for your required data throughput.
Messages * Message output rate * Message length (bytes) * bits in byte
Ex: 5 * 20Hz * 40 bytes * 10 = 40,000 bits/sec
Configuring the Ports
System PN 11210030 default as follows: PORT A set for NMEA 0183 @ 4800 Baud. PORT C set for NMEA 2000.
System PN 11210029 default as follows: PORT A set for NMEA 0183 @ 4800 Baud. PORT C set for NMEA 2000.
You may configure Port A or Port C of the GPS receiver to output any combination of data that you want.
f lt r r i t t
Port A can have a different configuration from Port C in terms of data message output, data rates, and the
baud rate of the port. This allows you to configure the ports independently based upon your needs.
Port A is always a serial port. To configure Port C as a serial port refer to Table 2-1 on page 16.
r
If you want one generalized port and one heading-only port, you can configure the ports as follows:
• Port A to have GPGGA, GPVTG, GPGSV, GPZDA, and GPHDT all output at 1 Hz over a 9600
baud rate
• Port C to have GPHDT and GPROT output at their maximum rate of 20 Hz over a 19200 baud rate
A personal computer (PC) typically uses a DB9-male connector for RS-232 serial port communications.
Note: For successful communications use the 8-N-1 protocol and set the baud rate of the 3D’s serial ports to
match that of the devices to which they are connected. Flow control is not supported.
Recommendations for Connecting to Other Devices
When interfacing to other devices, ensure the transmit data output from the 3D is connected to the data input
of the other device. The signal grounds must also be connected.
The 3D input ports are designed to work with the Navigator G2 compass display or PC SI-TEX Toolkit for
configuration purpose. There is likely little reason to connect the receive data input of the 3D to another
device. Unused input line can be left open.
Detailed wiring diagram for connections to SI-TEX autopilots and GPS display units are given in
Appendix D.