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CiM-550 IP Enabled Satellite Modem
Serial Remote Control
5.5 P
S
ACKET
Controller-to-target:
Start of
Target
Packet
Address
<
ASCII
code 60
(1
(4
character)
characters)
Example:
Target-to-controller:
Start of
Target
Packet
Address
>
ASCII
code 62
(1 character)
(4 characters)
Example:
Each of the components of the packet is explained below.
5.5.1 S
O
P
TART
F
Controller to Target: This is the character '<' (ASCII code 61)
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.
5.5.2 A
DDRESS
Up to 9,999 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.
The controller sends a packet with the address of a target - the destination of the
packet. When the target responds, the address used is the same address, to
indicate to the controller the source of the packet. The controller does not have its
own address.
IMPORTANT
TRUCTURE
Address
Instructio
n
De-limiter
Code
/
ASCII code
47
(1
(3
character)
characters)
<0135/TFQ=70.2345{CR}
Address
Instruction
De-limiter
Code
/
ASCII
code 47
(1 character)
(3 characters)
>0654/RSW=32{CR}{LF}
ACKET
Code
Optional
Qualifier
Arguments
= or ?
ASCII code
61 or 63
(1 character)
(n
characters)
Code Qualifier
=, ?, !, or *
ASCII code 61,
63, 33 or 42
(1 character)
57
Rev. 2
CD/CIM550.IOM
End of
Packet
Carriage
Return
ASCII code 13
(1 character)
Optional
End of Packet
Arguments
Carriage
Return, Line
Feed
(From 0 to n
ASCII code
characters)
13,10
(2 characters)
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