Schneider Electric SR2MAN01 user manual Clocks, Function blocks are used like contacts

LD Language Elements

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:

-

H-

The contact is conducting when the clock is in a validity period.

Normally closed mode:

Symbol of the normally closed contact, representing a clock:

-

h-

The contact is conducting when the clock is not in a validity period.

134 SR2MAN01 11/2007