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Serial Port
X941 Rev 1299 Video Loss Detector
Serial Commands
If you have connected your video loss detector to a host computer, you may communicate with the video loss
detector by sending serial commands to the detector from the host computer keyboard. Messages will display
on the host computer monitor to verify that the command was sent. The following commands are available:
Note: Disable the video loss detector password by changing it to “0000000000” (10 zeroes) before using the
host computer serial commands.
You may use HyperTerminal, which comes standard with Windows™ 95, for serial communications.
Windows is a trademark of Microsoft Corporation.
You must use XMODEM protocol for Upload, Download, Report Alarms, and Report Alarm Summary.
Caution: The video loss detector is in inactive mode (no detection) during upload and download transfers.
Command Command
Code
Description
Transfer
Size
Download <CTRL
A>r1<CR> Transfers
the detector software settings from
the host computer to the detector.
1920 bytes,
15 blocks
Upload
<CTRL A>r2<CR>
Transfers the detector software settings from
the detector to the host computer.
1920 bytes,
15 blocks
Clear Alarm
History
<CTRL A>h1>CR>
Clears out the detector alarm history.
0 bytes
Go System
<CTRL A>g1<CR>
Places the detector in active (detection)
mode. The detector is in inactive mode when
the programming screens are displayed on
the menu monitor.
0 bytes
Stop System
<CTRL A>s1<CR>
Places the detector in inactive (programming)
mode.
0 bytes
Update Time
<CTRL
A>thh:mm:ss<CR>
Updates the time at the detector.
hh = hour, mm = minute, ss = second.
0 bytes
Update Date
<CTRL
A>tmm/dd/yy<CR>
Updates the date at the detector.
mm = month, dd = date, yy = year.
0 bytes
System Inquiry
<CTRL A>’<CR>
Requests system verification from the
detector. The detector responds by sending
the message “Video Loss Detector” and its
model number.
0 bytes
Report Alarms
<CTRL A>d2<CR>
Transfers the alarm database from the
detector to the host computer.
4352 bytes,
34 blocks
Report Alarm
Summary
<CTRL A>d1<CR>
Transfers alarm summary data from the
detector to the host computer.
128 bytes, 1
block
