ChronTrol XT Series, Руководство пользователя, Страница: 48 / 51

XT Series Timer ChronTrol
46 User's Guide
Appendix A: Special Programming
Considerations
The following subsections discuss special programming considerations and
programming techniques for the XT.
Interval Timing
If your application requires an Interval Program , it is important to identify
how you want the program to affect its control assignments. Review the
corresponding
type of Interval (0-3) from the list below before setting an
Interval Program. The key sequence is different for each type.
There are four ways an Interval Program can be used to switch its control
assignments:
Type 0 ON for a length of time, then OFF. Key sequence:
ON OFF
INTERVAL
(or
INTERVAL
alone; Type 0 Interval is
assumed), then the duration. Duration is the length of time
ON before switching OFF. Think of it as “ON, then OFF
after an INTERVAL of
n ”.
Type 1 OFF after a length of time, regardless of current condition.
Key sequence:
OFF INTERVAL
, then the duration.
Duration is the length of time before switching OFF. Think
of it as “OFF after an INTERVAL of
n ”.
Type 2 OFF for a length of time, then ON. Key sequence:
OFF ON
INTERVAL
and duration. Duration is the length of time
OFF before switching ON. Think of it as “OFF, then ON
after an INTERVAL of
n ”.
Type 3 ON after a length of time, regardless of current condition.
Key sequence:
ON INTERVAL
and duration. Duration is
the length of time before switching ON. Think of it as “ON
after an INTERVAL of
n ”.