Comtech EF Data PCB-4000 - Manual (Page 51)

PCB-4000 1+1 Phase Combiner Revision 2
Serial Remote Control MN/PCB4000.IOM
5–3
5.2.2 Packet Structure
Controller-to-Target
Start of Packet Target Address Address Delimiter Instruction Code Code Qualifier Optional Arguments End of Packet
<
ASCII code 60
(1 character) (4 characters)
/
ASCII code 47
(1 character) (3 characters)
= or ?
ASCII codes 61 or 63
(1 character) (n characters)
Carriage Return
ASCII code 13
(1 character)
Example: <0412/MUT=1{CR}
Target-to-Controller
Start of Packet Target Address Address Delimiter Instruction Code Code Qualifier Optional Arguments End of Packet
>
ASCII code 62
(1 character) (4 characters)
/
ASCII code 47
(1 character) (3 characters)
=, ?, !, or *
ASCII codes
61, 63, 33, or 42
(1 character)
(From 0 to n
characters)
Carriage Return, Line
Feed
ASCII codes 13,10
(2 characters)
Example: >0412/MUT={CR}{LF}
5.2.2.1 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.
5.2.2.2 Target (Base) Address
Up to 9,999 devices can be uniquely addressed. In both EIA‐232 and EIA‐485 applications, the permissible range of values is 1 to 9999.
It is programmed into a Target unit using serial remote control.