User Manual VS2k-UMB / VS20k-UMB
V 2.3 / 28.01.2020
10
Chapter 9 Calibration / Adjustment
9 Calibration / Adjustment
The device has undergone a calibration in the factory when deliverd. The recommended
calibration interval is 12 months. An on-site calibration kit can be purchased.
9.1 Preconditions
•
Visibility must be at least 2000m / 6562 ft
•
No precipitation
•
PC / Laptop with serial interface
•
UMB-Config-Tool.Net (PC-Software)
•
Calibration kit (Lufft ref.-no.: 8366.UKAL2)
The exact description of how to carry out the calibration can be found in the online help of the
software UMB-ConfigTool.Net
10 Communication
Depending on the configuration of the device, the visibility can be requested in binary or
ASCII-protocol.
10.1 Binary-Protocol
This operating manual will show you an example of an online data request. For more
information about the protocol please download the
document ‘UMB Protocol’ on
www.lufft.de.
10.1.1 Framing
Der Daten-Frame ist wie folgt aufgebaut:
1
2
3 - 4
5 - 6
7
8
9
10
11 ... (8 + len)
optional
9 + len
10 + len
11 + len
12 + len
SOH
<ver>
<to>
<from>
<len>
STX
<cmd> <verc>
<payload>
ETX
<cs>
EOT
SOH
Control character for the start of a frame (01h) 1 byte
<ver>
Header version number, e.g.: V 1.0
→
<ver> = 10h = 16d; 1 byte
<to>
Receiver address, 2 bytes
<from>
Transmitter address, 2 bytes
<len>
Number of data bytes between STX and ETX; 1 byte
STX
Control character for the start of the payload data transmission (02h); 1 byte
<cmd>
Command; 1 byte
<verc>
Version number of the command; 1 byte
<payload>
Data bytes; 0
– 210 byte
ETX
Control character for the end of the payload data transmission (03h); 1 byte
<cs>
Check sum, 16 bit CRC; 2 byte
EOT
Control character for the end of the frame (04h); 1 byte
Control characters: SOH (01h), STX (02h), ETX (03h), EOT (04h).
