BAC_ErcIcPrt_01

Functional description

The template is used to protect an energy recovery unit from icing up.
If the differential pressure switch DiffPrssExhSwi is triggered, a ramp function is activated, which issues an analog limit signal.
The limitation of the energy recovery results in thawing through the warm exhaust air flow.

System diagram

Block diagram

VAR_OUTPUT

rY        : REAL;

rY: Ramp signal output. If the differential pressure switch is not triggered, 100% is output at rY

VAR CONSTANT

PLT_NUM    : BYTE := 1;

PLT_NUM: all alarms and events of all plant components within a controller are included in a global alarm and event list. The assignment of events and alarms to a plant is defined by the assignment of a PLT_NUM plant number.
The recording and processing of an alarm from an aggregate or a device takes place within the templates by means of the alarm function block FB_BA_Alarm.
The evaluation of the alarms of a plant, e.g. for the generation of a collective message or for plant shutdown in case of relevant faults, takes place within the template BAC_PltAlm_01 by means of the function block FB_BA_AlarmPlt.
The evaluation of different plant events within the templates of a plant, takes place within the template BAC_PltComnMsg_01 by means of the function block FB_BA_ComnMsg.

Important! The assignment and evaluation of the alarms and events of a plant can only be done correctly if all templates of a plant have the same plant number!

The plant number can be assigned in the Project Builder in the parameter menu for the templates or via a column in the Excel import.

Program description

IO linking

Variables for linking with the terminals

Version history