Safran LRF 6742 User Manual

LRF 6742 Integrator Manual
INTEGRATOR MANUAL LRF 6742 918574A
Public: 04.2023
Confidential & Proprietary  SAFRAN VECTRONIX AG – All rights reserved
Page: 29/63
8.4 Command Structure
The figure below depicts the structure of the message frame. The message is an ASCII string. The ASCII
code used is UTF- 8 as shown in chapter 11.6 UTF-8 ASCII Table.
Figure 13: Message frame format
Example:
Host  LRF Module
Command frame: >LM,Md,3*D5<0D>
LRF Module  Host
Acknowledge frame: >AC*84<0D>
Response frame: >LM,Md,v0006091,R000E301,R000E301*46<0D>
Prompt: <
 SOM (Start of Message) -> “>” (ASCII 0x3E) is used for message frame synchronization
 Product ID -> for LRF modules is “LM”.
 Message ID -> is composed of an upper case followed by a lower case letter “Md”
 Parameters -> “3”
o if required, can be of different types (decimal, string, char in the range of 0x20 to 0x7E)
o Not allowed characters: 0x2A (‘*’), 0x2C (‘,’), 0x3E (‘>’), 0x3C (‘<’) and 0x21 (‘!’).
 Checksum -> is the total sum in hexadecimal value of the message string between the ‘>’ and
the ‘*’ including the comas ‘,’
Characters
ASCII value in
Hex
Sum in Hex
L
4C
4C
M
4D
4C+4D = 99
,
2C
99 + 2C = C5
. . .
. . .
. . .
0
30
... = 71C
1
31
71C + 31 = 74D
Checksum
4D
Table 1: Example of checksum calculation
 EOM -> indicates the end of the message frame. <0D>.
 Acknowledge -> indicates that the command is valid and the module is processing it.
>xx,<msg id>,<param 0>,....,<param N>*<chk sum><CR>
Checksum Range
EOM
Checksum
Message ID
SOM
Product ID
Parameter 0
Parameter N

Safran LRF 6742 Specifications

General

Brand	Safran
Model	LRF 6742
Category	Measuring Instruments
Language	English