Schneider Electric SR2MAN01 Active, control held down type a, Active, Press to start/stop type a

LD Language Elements

Timing Diagrams Timing diagrams are provided here to illustrate the various behaviors of the Timer function block, according to the type of timer chosen:

Active, control held down (type A):

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

TT

RT

T

tA

Active, Press to start/stop (type a):

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

TT

RT

T

tA

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

Off delay (type C):

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

TT
RT
T
tA	t < tA	tA

106 SR2MAN01 11/2007