
SATEL Proof-TR4+/R4+/TR9
User Guide, Version 2.2
17
4.2.3
Syntax of SL commands
An SL command is a one continuous string of specific characters, which is separated from other
data by pauses that are equal or greater than the time defined by
Pause Length
setting (default
value is 3 characters). The continuous here means that there are no pauses between the
adjacent characters inside the SL command on the serial line.
The syntax of an SL command is:
SL<Command><CR><LF>
, where:
<Command> is the actual character string defining the actual command.
<CR> is Carriage Return (ASCII character 13, 0x0d in hexadecimal)
<LF> is LineFeed (ASCII character 10, 0x0a in hexadecimal).
Note that the use of <CR> <LF> is optional but recommended.
The radio modem will acknowledge all commands by returning "OK" (command carried out or
accepted) or the requested value, or "ERROR" (command not carried out or interpreted as
erroneous) message.
If multiple SL commands are sent to the radio modem, the next command can be given after
receiving the response ("OK" or "ERROR") of the proceeding command. In addition, it is
recommended to implement a timeout to the terminal software for recovering the case when no
response is received from the radio modem.
SL commands are described in separate documentation, contact SATEL for more information.