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118 C1553M-B (4/05)
The Pattern Matching tab allows you to define the following patterns:
• Pattern To Match: Use this section to configure the pattern that matches the string that will be sent when an alarm has been tripped.
Every access control device must have a Pattern To Match defined for it. When an incoming string matches the Pattern To Match and the
point number in the string matches a point number on the Access Control Points tab, VMX300(-E) sets the read property for that point to
True.
• Reset Pattern To Match: (Optional) Use this section to configure the pattern that matches the reset string, which is the string sent when
an alarm condition is no longer in place. When an incoming string matches the Reset Pattern To Match and the point number in the string
matches a point number on the Access Control Points tab, VMX300(-E) resets the read property for that point to False. If the access control
device does not send a reset string, you do not need to define this pattern.
You can use either a predefined pattern or a custom pattern. You can also define a custom pattern and then save it to the list of predefined
patterns for later use. Refer to Create a Custom Pattern as the Pattern to Match and Create a Custom Pattern as the Reset Pattern to Match for
instruction on saving custom patterns.
Select a Predefined Pattern as the Pattern to Match
1. Click the Pattern To Match tab.
2. Click “Pre-defined,” and then click Select. The Pre-defined Patterns list opens.
Figure 146. Predefined Patterns List
VMX300(-E) provides the following predefined patterns:
• Pelco ASCII Protocol Switch Pattern: Use this pattern for any access control device that employs the Pelco ASCII Protocol to
switch cameras to monitors in response to alarms. In this case, the point number in the alarm string is a camera number. Refer to How
to Define Alarms Based on Access Control Points: Example for instructions on configuring VMX300(-E) to switch cameras to monitors
in response to alarms.
• Pelco ASCII Protocol Alarm Pattern: Use this pattern for any access control device that sends out an actual alarm number, rather
than a camera number, as the Pelco ASCII Protocol Switch Pattern does. The VMX300(-E) response to an alarm that matches this pat-
tern is determined by the scripts you associate with the VMX300(-E) alarm or event that is triggered when the point’s read property is
set to True.
• Default Generic Pattern: Use this pattern for access control devices that allow you to customize the strings that are sent out when
alarm conditions are detected.
For a description of the syntax used in the predefined patterns, refer to Pattern Syntax.
3. Double-click the pattern that you want to use. The Pre-defined Patterns list closes, and the selected pattern appears in the Pattern To
Match box.