====== Limits ======

{{:en:mervis-ide:35-help:b82.png}}

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

B82_LIMITS

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

<code st-iec>
PROGRAM TEST2_B82
 VAR 
 FB : LIB.CORE.V1_2.B82_LIMITS;
 IN_V:REAL;
 MAXIMUM_V:REAL:=20;
 MINIMUM_V:REAL:=0;
 OUT_V:REAL;
 END_VAR
FB(IN:=IN_V, MAXIMUM:=MAXIMUM_V, MINIMUM:=MINIMUM_V);
OUT_V:=FB.OUT;
END_PROGRAM
</code>

===== Library =====

LIB\CORE

===== Version =====

V1.2

===== Description =====

The block is limitating the input signal by upper and lower bounds. Using one limit only is possible, the other limit is infinite or -infinite.

===== Inputs =====

|Input  |Type|Description       |Default value|
|IN     |REAL|Input signal      |0            |
|MAXIMUM|REAL|Upper signal limit|1            |
|MINIMUM|REAL|Lower signal limit|0            |
|MAXON  |BOOL|Enable upper limit|True         |
|MINON  |BOOL|Enable lower limit|True         |

===== Outputs =====

|Output|Type|Description              |
|OUT   |REAL|Limited output signal    |
|SIGN  |BOOL|Sign of the output signal|

===== Function =====

The block limits the input signal x by upper and lower limit.

  * When //minon=true//, the signal //x// is limited by the lower bound //minimum//.
  * When //minon=false//, the low limit is not used.\\

  * When //maxon=true//, the signal //x// is limited by the upper bound //maximum//.
  * When //maxon=false//, the high limit is not used.

Output //sign// is the sign of the output //y//. If //y>= 0// then //sign=true//, otherwise //sign=false//.

===== Function in case of incorrect setting  =====

When //minon=maxon=true// and //maximum<minimum// then //y=maximum// (lower value of both).

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

{{:en:mervis-ide:35-help:b82_example.png}}\\


Function B82 with upper limit //maximum//=100.

===== Older version  =====

\\
Version  V1.0 was defined as a function. V1.1 is defined as a function block, therefore it can bes added to graphs and it can be set tu manual mode. Functionality remains without change.