CTUD_UDINT

PROGRAM CTUD_UDINT_DEMO
     VAR
     BOOL1,BOOL2,BOOL3,BOOL4,BOOL5,BOOL6: BOOL;
  UDINT1,UDINT2: UDINT;
   FB:CTUD_UDINT;
 END_VAR
    FB(CU:=BOOL1,CD:=BOOL2,R:=BOOL3,LD:=BOOL4,PV:=UDINT1,QU=>BOOL5,QD=>BOOL6,CV=>UDINT2);
END_PROGRAM

Description

The block is an up and down counter. If both r and ld are true, r has higher priority.

Input	Type	Description	Default value
CU	BOOL	Adds 1 on rising edge	False
CD	BOOL	Subtracts 1 on rising edge	False
R	BOOL	Reset to zero	False
LD	BOOL	Sets the counter to the maximum value	False
PV	UDINT	Maximum counter value	0

Output	Type	Description
QU	BOOL	Status when the counter reaches its maximum value
QD	BOOL	Status when the counter is zero
CV	UDINT	Current counter value

CTUD_UDINT

Block name

ST call

Description

Inputs

Outputs

Application example