Function Call in ST

READ_FLASH(EN := EN_FLASH_READ,
     NB := NB_FLASH_READ,
     SEG := SEG_FLASH_READ,
     BNR := BNR_FLASH_READ,
     SM := SM_FLASH_READ)
DONE_FLASH_READ := READ_FLASH.DONE;
ERR_FLASH_READ := READ_FLASH.ERR;
ERNO_FLASH_READ := READ_FLASH.ERNO;