FB_BA_IceProtection

Sub-template ice protection.

The function block FB_BA_IceProtection implements the icing protection. If the temperature falls below the freezing point entered on the SPIce object and the weather station transmits precipitation via the variable list Site (Site.stWeatherStation.bRain), the icing condition is given and the blinds are raised completely.

The alarm is only canceled when the outside temperature exceeds the icing temperature again for a deicing time (in seconds) set on the DeiceTi object.

The telegram is then no longer active.

To ensure that current temperature values are available at the start of the program, the activation of the icing alarm function block is initially delayed by 10 s.

The initialization of the template takes place within the method FB_Init.

Block diagram

Syntax

FUNCTION_BLOCK FB_BA_IceProtection EXTENDS FB_BA_View
VAR_OUTPUT
  stSunBld         : ST_BA_SunBld;
  bIcePrtcActv     : BOOL;
END_VAR
VAR_INPUT CONSTANT
  SpIce            : FB_BA_AV_Op;
  DeiceTi          : FB_BA_AV_Op;
  IceAlert         : FB_BA_BV;
  SunBldIcePrtc    : FB_BA_SunBldIcePrtc;
END_VAR
VAR
  tonInitialWait    : TON;
END_VAR