NFS-640 Programming Manual P/N 51333:B 10/03/2003 95
Appendix D: CBE (Control-By-Event)
Description
CBE (Control-By-Event) is a software function that provides a means to program a variety of output
responses based on various initiating events. The control panel operates Control-By-Event (CBE)
through 99 Software Zones with the following features:
• Each input point (detector, monitor module) can list up to five Software Zones
• Each output point (control module, NAC, Panel Circuit) can list up to five Software Zones
• Output points can list zone Z00 (general alarm). Non-Alarm or Supervisory points do not
activate Software Zone Z00 (general alarm)
Input and Outputs
Input and output devices with CBE-listed Software Zones work as follows:
Equations
Space for up to twenty logic or time delay equations is included in the control panel. Each equation can
be a logic equation or a time delay function. A time delay function can have a logic equation as an
internal equation, but not vice versa. The rules of the equations are:
1. Equations can be entered
, edited and viewed in the VeriFire™ Tools program, but can only be
viewed
on the control panel.
2. The twenty equations are designated in the panel as ZE0-ZE9 and ZL0-ZL9, and are evaluated in
that order.
Note: In the VeriFire™ Tools program, ZL1 - ZL10 corresponds to ZE0-ZE9, and ZL11 - ZL20 corresponds to ZL0-
ZL9.
3. Equations will always begin with a logic or a time delay function.
4. Equations will be a maximum of 73 characters long, including parentheses and commas.
5. Equations can have a maximum of 10 logic functions. The function set is listed below in “Equation
Entry” on page 96.
6. These equations are to be evaluated after all other devices have been evaluated.
7. One logic equation can be used as a variable in another equation only if the equation used has
previously been evaluated. For example, the results of the ZE0 equation can be used in the ZL5
equation but the opposite is not true.
8. Time delay equations can use any other functions as an internal equation, but the other function can
not use time delay equation as an internal equation.
9. A logic instruction can have a maximum of 20 arguments (inclusive start and stop address).
10. Maximum for the delay timer is 18 hours 12 minutes.
These devices Operate with CBE as follows
Inputs (detectors, monitor modules) When an input device activates, so do all Software
Zones listed to the input device.
Outputs (control modules and NACs,
and Panel Circuits)
When a Software Zone activates, the output
device(s) in that zone turns on.
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