User manual

LD Language Elements

SR2MAN01 11/2007 109

Flasher unit, Press to start/stop asynchronously (type l):

The following diagram shows the operation of the type l timer:

Time on addition (type T):

The following diagram shows the operation of the type T timer:

With addition type, the preset value can be reached:

z In one step: t,

z In several steps: t1 + t2 + ... + tn.

Modifying the

Mode of a Coil or

a Contact

To modify the operating mode of a coil or a contact from the front panel of the smart

relay (the programming window displayed on screen), simply:

z Position the cursor on the symbol representing the coil mode or on the letter of

the contact,

z proceed as described in the paragraph Modifying an element,, p. 44, to scroll

through the possible modes for a coil or contact types possible (T for normally

open contact, t for a normally closed contact).

Initialization State of the contacts and current values on initialization of the program:

z The normally open mode (direct state) is inactive,

z the normally closed mode (inverse state) is active,

z the current value(s) is (are) zero(s).

Note: each pulse on the TTx input resets the current timer value to 0.

t1 t2 t3t

total activity time: t1 + t2 + t3 = t