Pelco DRD14 用户手册

Pelco Manual C466M-E (6/99)

5.2.4 Extended Commands

Extended commands will always have B0 of Word 4 set to one. The following num-
bers are in hexadecimal format:

Command

Word 3

Word 4

Word 5

Word 6

Set preset XX

01 to 20

Clear preset XX

01 to 20

Go to preset XX

01 to 20

180 FLIP preset

Zero pan position

Set aux XX

01 to 08

Clear aux XX

01 to 08

Remote Reset

Clear screen

Pattern Start Point

Pattern Stop Point

Run Pattern

Lens Speed

00 to 03

The four word response format is: word one is the sync 0xFF, word 2 is the receiver
address, word 3 is the alarm information, and word 4 is a return check sum (which
is the transmitted check sum added to the alarm information).

5.3 PELCO “P” TYPE RS-422 CONTROL

5.3.1 Protocol

This section describes the protocol used to send commands to the receivers via
RS-422. The hardware interface is four-wire RS-422, where one pair is used to
issue commands to the receiver. The protocol is one start bit, eight bits data, and
one stop bit at 9600, 4800 or 2400 baud. The message format is 8 of these 10-bit
words with the following format:

WORD 1 — STX (0XA0)
WORD 2 — ADD (0 to 0X1F)
WORD 3 — Data as described below
WORD 4 — Data as described below
WORD 5 — Data as described below
WORD 6 — Data as described below
WORD 7 — ETX (0XAF)
WORD 8 — CRC