Comtech EF Data SLM-5650 Installation And Operation Manual page 125

SLM-5650 Satellite Modem
Remote Control
B.5 Packet Structure
Controller-to-target:
Start of Packet Target Address
<
ASCII code 60
(1 character) (4 characters)
Example:
Target-to-controller:
Start of Packet Target
Address
>
ASCII
code 62
(1 character) (4 characters)
Example:
Each of the components of the packet is now explained.
B.5.1 Start Of Packet
Controller to Target: This is the character '<' (ASCII code 60)
Target to Controller: This is the character '>' (ASCII code 62)
Because this is used to provide a reliable indication of the start of packet, these two
characters may not appear anywhere else within the body of the message.
B.5.2 Address
Up to 9999 devices can be uniquely addressed. In EIA-232 applications this value is set
to 0. In EIA-485 applications, the permissible range of values is 1 to 9999. It is
programmed into a target unit using the front panel keypad.
Address Instruction
De-limiter Code
/
ASCII code 47
(1 character) (3 characters)
<0135/TFQ=70.2345{CR}
Address Instruction
De-limiter Code
/
ASCII
code 47
(1 character) (3 characters)
>0654/RSW=32{CR}{LF}
B–3
Code Optional
Qualifier Arguments
= or ?
ASCII code 61
or 63
(1 character) (n characters)
Code Qualifier Optional
Arguments
=, ?, !, or *
ASCII code 61,
63, 33 or 42 (From 0 to n
(1 character) characters)
Revision 1
MN/SLM5650.IOM
End of Packet
Carriage Return
ASCII code 13
(1 character)
End of Packet
Carriage Return,
Line Feed
ASCII code 13,10
(2 characters)