Schneider Electric SR2MAN01 Time on addition type T, Normally closed mode inverse state is active

LD Language Elements

Modifying the Mode of a Coil or a Contact

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

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

TT
RT
T
t1	t2

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

Time on addition (type T):

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

t	t1	t2	t3
TT
RT
T
total activity time: t1 + t2 + t3 = t

With addition type, the preset value can be reached:

zIn one step: t,

zIn several steps: t1 + t2 + ... + tn.

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:

zPosition the cursor on the symbol representing the coil mode or on the letter of the contact,

zproceed 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).

SR2MAN01 11/2007 109