American Dynamics AD2052 System Programming Manual page 41

ALARM - Used for an Alarm Interface Unit connection for input of alarm codes to the 2052CPM. Each alarm event message
sent to this port generates an output message to a serial printer via the PRINTER port (see below).
KEYBOARD - Enables keyboard (or computer) control inputs to the port. For this use set Data Bits to 8, Parity to NONE, and
Stop Bits to 1. When a Port Expander is used, the port baud rate must be set to 4800, and the keyboards set to 1200.
TERMINAL - Used to upload and download setup information for the 2052 system from a PC. Select this use type when using
the 2052SW15 software package. To obtain consistent performance from a PC, a 4800 baud rate is recommended.
VIDEO LOSS - Enables communication by a Video Loss Detector module to the 2052CPM. Each video loss message sent to
this port generates an output message to a serial printer via the PRINTER port (see below).
PRINTER - Outputs messages for all alarm and video loss events, both occurrence and removal, to a serial printer.
The ALARM message format is as follows:
05-MAR-1993 13:23:26 CONTACT 0001 CAMERA 0001 CONTACT OPENED
Date of Event
Time of Event
Alarm Status:
The VIDEO LOSS message format is as follows:
05-MAR-1993 13:23:26 CAM 0001 VIDEO YES SYNC YES SET LOW
Date of Event
Time of Event
Video Loss:
Sync Loss:
Video Loss Mode:
The following message is printed when the VLD module is cleared, by the "108 F2" command (see page 3-3):
05-MAR-1993 13:23:26 REAL CAMERA INPUTS nnnn TO nnnn DISABLED
Where the nnnn TO nnnn indicates the group of cameras that were cleared.
PORT USE Types
Contact Number
that caused Alarm
Camera Number associated with that contact
CONTACT OPENED - the alarm contact input has been removed/reset (Instant Clear)
TIMED OUT - the alarm was cleared by timeout (Auto Clear)
ACKNOWLEDGED FROM KEYBOARD nn - the alarm was cleared from keyboard nn
When the alarm first occurs, Alarm Status is blank
Camera Number Video Loss
that lost video
VIDEO YES - indicates that the video signal is present
VIDEO NO - indicates that there is no video signal
VIDEO LOST - indicates that the video signal was just lost
VIDEO RESTORED - indicates that the video signal was just restored
SYNC YES - indicates that the sync signal is present
SYNC NO - indicates that there is no sync signal
SYNC LOST - indicates that the sync signal was just lost
SYNC RESTORED - indicates that the sync signal was just restored
SET OFF - video loss detection is currently disabled
SET LOW - sync and low picture content video loss detection enabled
SET MEDIUM - sync and medium picture content video loss detection enabled
SET HIGH - sync and high picture content video loss detection enabled
SET SYNC ONLY - sync loss detection only enabled
Alarm Status
Video Loss Detection Mode
Sync Loss
4-21
MENU PROGRAMMING