Function Blocks
CALEVT Calendar Event Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 89
2/07
CALEVT Calendar Event Function Block
Description
The CALEVT label stands for Calendar Event.
This block is part of the
Counters/Timers category.
Function
The Calendar Event Block compares user-entered time-and-date setpoints to the real-time clock to generate
digital Event outputs. These Event outputs can be integrated into a control strategy to activate time-
synchronized activities. For example, the Event outputs can be used turn-on or turn-off the lights in an
office building. Each Calendar Event block supports up to eight Event outputs.
In addition, the block allows you to configure up to five sets of time-and-date setpoints, called Setpoint
Groups. These Setpoint Groups can be used to activate different sets of time-and-date setpoints to handle
different conditions. Using the example of an office building, Setpoint Groups can be used to activate a
different set of time-and-date setpoints for each season of the year (Spring, Summer, Fall, and Winter).
Each Calendar Event block supports five Setpoint Groups.
The block also allows you to configure up to 16 Special Days. On these Special Days the Calendar Event
Block will override its normal Event processing for a 24-hour period. For example, you can configure
selected Event outputs to remain off on designated holidays.
Input
ENABLE =
Enable; off = all event outputs (1-8) are off
^EVT1 = Event number 1 override input
^EVT2 = Event number 2 override input
^EVT3 = Event number 3 override input
^EVT4 = Event number 4 override input
^EVT5 = Event number 5 override input
^EVT6 = Event number 6 override input
^EVT7 = Event number 7 override input
^EVT8 = Event number 8 override input
^EVT1 thru ^EVT8 allows the user to activate the output pins OUT1 thru OUT8 of the function block
based on a condition other than time. The output action would be a one-shot.
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