Laser LS8000-3 manual RS-232/RS-422 Communication, Baud Rate & Framing

LaserSpeed 8000-3 Instruction Handbook

RS-232/RS-422 Communication

RS-232/RS-422 Communication

The LS8000-3 gauge has a full set of serial commands which you can use to configure and read data from the instrument. In order to interface serially, you will need to connect the RS-232/RS-422 receive and transmit signals on the gauge to the serial port on your computer. If you are using a LaserSpeed Breakout Assembly, you can connect a straight-through RS-232 cable from the connector labelled RS-232to any PC serial port. If you change the baud rate to 230.4k and can no longer communicate with the LS8000-3, follow the procedure in the Automatic Baud Rate Detection section to recover.

When changing settings, the gauge settings must be unlocked before settings can be modified. See the *LOCKED and *LOCKEN commands for details.

If you are not using a LaserSpeed Breakout Assembly, see the Connecting to Outputs section for wiring details.

Baud Rate & Framing

The LS8000-3 supports baud rates from 4800 to 230.4k, and supports both 7n2 and 8n13 framing. Flow control is not supported. The baud rate and framing for the RS-232 and RS-422 ports are individually configurable. The configuration can be changed with LaserTrak, or with a serial command. Be careful when setting the baud rate to 230.4kBaud, because PC's typically do not support this baud rate. You may have to purchase an add-on high speed serial card or USB serial converter to use this baud rate.

Note: If you change the baud rate or framing for the port you are currently using, you will have to change the local baud rate to match the LS8000-3 after sending the command. LaserTrak handles this change automatically.

Serial Commands to set Baud Rate & Framing

Configuration Setting	Serial Command
RS-232 Baud Rate & Framing	"J"
RS-422 Baud Rate & Framing	"@"

3 "7n2" = 7 Data Bits, No Parity, 2 Stop Bits, "8n1" = 8 Data Bits, No

Parity, 1 Stop Bit

Part No. 93463 / Drawing No. 0921-01561 Page 121 of 221 Revision A (Sep 2007)