XT Series Timer
ChronTrol
18
User's Guide
Section 3: Programming Procedures
This section discusses how to enter a program into the timer, and how to
review and verify entered information.
Features
This discussion will provide you with a general working knowledge of the
XT’s features. The XT’s programming capabilities are very flexible. Plan
your programs carefully to maximize their usefulness.
On/Off Programs vs. Interval Programs
There are two types of programs:
On/Off
and
Interval.
An
On/Off Program
uses ChronTrol's accurate internal clock as a reference
for
real time
settings. Specific On/Off program settings are made in hours
and minutes, a.m. or p.m., and seconds if desired. An On/Off Program repeats
at the same time every day unless the Day Omission or Cycle Length features
are used. Time settings can also be set to occur on a specific date in the
upcoming year, or to begin on one date and end on another. If your
application requires any of these settings, familiarize yourself with the Day
Omission, Cycle Length, and Calendar features.
An
Interval Program
does not use real time settings, but is activated only on
demand by an input, another program or a keyboard command. An interval
program is entered as a duration of time, like one hour, or two hours, etc. An
interval program occurs one time only, when activated, or it can repeat by
using the Cycle Length feature. For information on the four types of intervals
that can be set, see Appendix A
: Special Programming Considerations
.
Any On/Off Program or Interval Program can control circuits, inputs, or
other programs, which are called Control Assignments.
Summary of Contents for XT Series
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