Laser Technology UltraLyte LR B, Руководство пользователя

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Section #6 – Serial Data Interface
45
Electronic Copy of LTI's UltraLyte LR B User's Manual - 2
nd
Edition © 2002
Ground
Trigger
Serial Out
Serial In
1
2
3
4
Section #6 – Serial Data Interface
The UltraLyte serial interface uses RS-232 +/-12V signal levels
and data format. Figure 29 shows the pin-out assignments for the
UltraLyte LR B’s serial port.
Data Formats
There are two specific data formats.
• 20-20 format: Identical to that of the Laser Technology
Marksman 20/20 speed detection instrument. The 20-20
format is applied only when the Speed Mode is active.
•
Criterion 400 format:
Identical to that of the horizontal vector
message from the Laser Technology Criterion family of survey
instruments. The Criterion format is applied only when the
Survey Mode is active.
Your UltraLyte LR B may not include the Survey Mode. It is
a factory-defined option that is set when the instrument is
shipped.
Format Parameters
Table 9 lists the format parameters.
Table 9. Serial Data Format Parameters
Parameter Value
9600 (20-20 format)
BPS
4800 (Criterion format)
Start bit 1
Data bits 8
Stop bit 1
Parity no
Figure 29. Serial Port Pin Assignments