CTU

Counts (integers) from 0 up to a given value in increments of 1.
IMPORTANT: The CTU block does not detect the rising edges or falling edges of the counting input (CU). The block must be associated with an "R_TRIG" or "F_TRIG" block to create a pulse counter.
lrsb_ctu1
Arguments
CU
BOOL
Counting input (counting when CU is TRUE)
RESET
BOOL
Reset command (dominant)
PV
DINT
Programmed maximum value
Q
BOOL
Overflow: TRUE when CV >= PV
CV
DINT
Counter result
Example
(* FBD program using the CTU block *)
lrsb_ctu2
(* ST Equivalence: We suppose F_TRIG1 is an instance of F_TRIG block and CTU1 is an instance of CTU block*)
F_TRIG1(command);

CTU1(F_TRIG1.Q,NOT(auto_mode),100);

overflow := CTU1.Q;

result := CTU1.CV;
Provide Feedback
Have questions or feedback about this documentation? Please submit your feedback here.
Normal