PACOM PDR16-RMT Series, User Manual

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Digital Video Recorder
117
Appendix 9 — Protocol for Remote Controlling DVR
Message Format
<BOM><ID>:<Class>:<Code>[:Operands]:<Checksum>[EOM]
where
Symbol Value Description
: : Field delimiter
@ Beginning of message (for command) <BOM>
< Beginning of message (for reply)
<ID> 00~99 Device ID
<Class> DR Device Class (“DR” for DVR systems)
<Code> AA~zz Op-code (see below)
<Operands> Optional operands defined for each operation
00~99 Checksum (sum of ASCII codes before checksum discarding overflow)
i
<Checksum>
* No checksum
[EOM] ^J^M End of message (optional: only for convenience of users using general terminal)
*All digits are used in decimal format.
*Example
buffer = “@01:DR:SF:0:”;
= checksum(buffer);
*Letters are case sensitive.
Control Flow
y
Every transaction consists of one command and one reply.
y
Characters transmitted before <BOM> are ignored.
y
The format of operands is defined independently for each op-code.
y
The <BOM> received before <Checksum> of the previous message resets interpretation: i.e., discards the
previous message. EXCEPTION: in case of text input, none of characters within specified length has special
interpretation.
Common Reply
Reply code Reply data Description
ok
er 0000~9999 Error: return error number
General Functions
Function Code Operands
ii
Reply Reply data
Power Off PO
Time Setting TM YYYYMMDDHHMMSS
iii
LogIn LI 01~16:****:01~08:****
iv
LogOut LO
v
Cursor Control
Function Code Operands Reply Reply data
Tab TB F/B(direction)
Enter EN
Text Input TI 01~99(length):string
vi