====== CTUD_ULINT ======

{{:en:mervis-ide:35-help:ctud_ulint.png}}

===== Block name =====

CTUD_ULINT

===== ST call =====

<code st-iec>
PROGRAM CTUD_ULINT_DEMO
     VAR
     BOOL1,BOOL2,BOOL3,BOOL4,BOOL5,BOOL6: BOOL;
  ULINT1,ULINT2: ULINT;
   FB:CTUD_ULINT;
 END_VAR
    FB(CU:=BOOL1,CD:=BOOL2,R:=BOOL3,LD:=BOOL4,PV:=ULINT1,QU=>BOOL5,QD=>BOOL6,CV=>ULINT2);
END_PROGRAM
</code>

===== Description =====

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

===== Inputs =====

|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   |ULINT|Maximum counter value                |0            |

===== Outputs =====

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

===== Application example =====

{{:en:mervis-ide:35-help:ctud_ulint_example.png}}