Laser LS8000-3 manual Automatic Baud Rate Detection, Method

LaserSpeed 8000-3 Instruction Handbook

RS-232/RS-422 Communication

For example: if the RS-232 port is configured for 38.4kBaud, 7N2, and the RS- 422 baud rate is set to 115.2k, 8N1, the COMM light will blink 4 sets of 4 Orange blinks with the Valid LED turned OFF, followed by 4 sets of 2 Blue blinks with the valid LED turned ON.

Automatic Baud Rate Detection

The LS8000-3 can automatically detect the baud rate and framing that you are using during the first 20 seconds after power is applied to the gauge. This is to make it possible to recover if you set the baud rate to a rate too high for your PC to support, or if the RS-232 baud rate is too high for the length of cable you are using. The Autobaud feature operates on both the RS-232 and RS-422 serial ports independently.

At power-on, the LS8000-3 loads the Baud Rate & Framing settings for the RS-232 and RS-422 serial ports from non-volatile memory and listens for commands. For the first 20 seconds after power-on, the serial port is monitored for activity, and the baud rate is measured. If a carriage return (hex 0x0d) is received during this time, the gauge ignores the baud rate stored in non-volatile memory, and switches to the measured baud rate. The gauge will use this baud rate until the power is cycled again, or a configuration setting is changed, at which point it will revert to the last stored setting. After communications are established, you can change the stored setting by configuring it with LaserTrak, or by sending a command with a terminal program such as HyperTerminal. To ensure that communications is not lost again, the baud rate should be set before attempting to change any other parameters.

Method 1

1)Turn off power to the LS8000-3

2)Start LaserTrak, but don't click the Search button yet

3)Turn on the LS8000-3, and wait for the COMM light to start flashing (or wait for 10 seconds if you can't see the light)

4)Click Search—the LS8000-3 should be found automatically

5) In LaserTrak, click Tools LaserSpeed Configuration

6)Select the Communication tab

7)Select a new baud rate, and click Update

Part No. 93463 / Drawing No. 0921-01561 Page 124 of 221 Revision A (Sep 2007)