25. BI-DIRECTIONAL COMMUNICATION
The total station features bi-directional communication. It is possible for external
devices to control the total station in order to perform measurements and get
measurement results through this communication process. i.e. External Data
Collectors.
Before performing this function, define the softkey
【
COMM
】
in the Meas mode
following the steps in “22.3 define the keys function”, then press
【
COMM
】
to start
this function.
Reference: Communication protocol
1. Communication setting:
Baud rate: 1200
Data length: 8
Parity bits: none
Stop bits: 1
2. Agreement
：
（
1
）
Code
：
STX
（
02
），
CR
（
13
），
X_ON
（
17
），
X_OFF
（
19
）
,the other is ASCII character.
（
2
）
Distance and angle data are transferred by a form of fixed length of 7 byte, if less
than 7 byte, fill zero in the front .
Angle data:
Degree: 3 bytes
Minute: 2 bytes
Second: 2 bytes
Distance data:
Integer: 4 bytes
Fraction: 3 bytes
For example: 30°25
′
07
″
should be represented by 0302507, and 23.543 m should be
represented by 0023543.
If each data is invalid, the first character of it will be marked with “E”.
3. Command and data format
(1) Check communication
Ask
：
STX+T+C+CR
Respond
：
X_ON ;
105
Summary of Contents for CST202
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