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74 Pelco Manual C1515M-A (11/01)
ASCII OPERATING COMMANDS
ASCII protocol uses the ASCII character set to transmit and receive commands between a
personal computer (PC) and the CM6800. The commands are readable but are not English.
ASCII commands control the pan and tilt mechanisms (fixed and variable speed), camera
functions, auxiliary relays, and alarms.
The ASCII protocol communicates in a standard asynchronous, byte-oriented protocol that
includes: 1 start bit, 8 data bits, 1 parity bit (odd parity), and 1 stop bit. The default
communication rate is 9600 baud.
A lowercase “a” ends each command. The ASCII translator acknowledges accepted
commands and rejected commands with the following responses:
AKa command accepted
NAa command rejected or the ASCII translator does not recognize the command
If the command requires a numeric value, enter the number first.
Table I provides examples of ASCII commands. Table J lists all of the commands.
Table I. Examples of ASCII Commands
Functional Procedure Commands Result
Select a pan and tilt 3Ma16#a Switch camera 16 to currently selected
device labeled monitor 3.
“CAMERA # 16” and
switch it to monitor # 3.
Manipulate the pan 1Ma3#a Switch camera 3 to monitor 1.
and tilt device.
5Ma2#a3\a Go to camera 2, preset 3, on monitor 5.
47Ra33Da Pan right at speed 47, tilt down at speed 33.
sa Stop all image motion.
Switch a camera. 1Ma3#a Switch camera 3 to monitor 1.
Call a preset. 5Ma2#a3\a Go to camera 2, preset 3, on monitor 5.
Pan and tilt. 47Ra33Da Pan right at speed 47, tilt down at speed 33.
Appendix