====== Switch-off delay ======

{{:en:mervis-ide:35-help:bd13.png}}

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

BD13_SWITCHOFFDELAY

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

<code st-iec>
PROGRAM BD13_TEST
VAR 
  IN1,OUT1: BOOL;
 FB: LIB.CORE.V1_1.BD13_SWITCHOFFDELAY;
END_VAR
   FB(IN:=IN1);
    OUT1:=FB.OUT;
END_PROGRAM
</code>

===== Library =====

LIB\CORE

===== Version =====

V1.1

===== Description =====

The delay block transforms the input signal //IN// so that each falling edge is delayed by //TOFF//. The rising edge of //IN// is not delayed, it appears on the output immediately. The //TRES// parameter gives time remaining to the end of delay. The //TRES// value can be reset by a rising edge on the //RESET// input.

{{:en:mervis-ide:35-help:bd13_1.png}}

===== Inputs =====

|Input          |Type|Description                                                  |Default value|
|IN             |BOOL|Input value                                                  |False        |
|RESET          |BOOL|Resets the //TRES//.////                                     |False        |
|IGNORESTARTEDGE|BOOL|If //TRUE// the block is not initialised after start////.////|False        |
|TOFF           |TIME|Falling edge delay (30 s by default)                         |30s          |

===== Outputs =====

|Output|Type|Description                       |
|OUT   |BOOL|Output signal                     |
|TRES  |TIME|Time remaining to the end of delay|

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

{{:en:mervis-ide:35-help:bd13_example.png}}\\


The block is used e.g. for extended run of pumps by several minutes to prevent fast switching cycles.

\\


\\


===== Older versions  =====

\\


Version V1.0 is flagged as BROKEN. It contained an error of IGNORESTARTEDGE input. Valu on this input during firt cycle of program was not reflecter even if the function block was set correctly.