User manual

LD Language Elements
106
SR2MAN01 11/2007
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:
Active, Press to start/stop (type a):
The following diagram shows the operation of the type a timer:
Off delay (type C):
The following diagram shows the operation of the type C timer:
Note: each pulse on the TTx input resets the current timer value to 0.
tA
RT
TT
T
tA
RT
TT
T
tA
RT
TT
T
tAt < tA