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LD Language Elements
134
SR2MAN01 11/2007
Clocks
Description
Use the
Clocks
function to validate the time ranges during which actions can be executed.
The smart relay has 8 Clocks function blocks numbered from 1 to 8. Each of these
has four programming ranges and behaves like a weekly programmer. The Clocks
function blocks are used like contacts.
Use as a Contact This contact may use the direct state of the Clock function block (normally open
mode) or its inverse state (mode normally closed), see below.
Normally open mode:
Symbol of the normally open contact, representing a clock:
The contact is conducting when the clock is in a validity period.
Normally closed mode:
Symbol of the normally closed contact, representing a clock:
The contact is conducting when the clock is not in a validity period.
H--
h-
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