@Giamba This sometimes happens, I recommend using a filtering function block for each temperature sensors. Something like this, this is a old filter that one of our customers used:

FUNCTION_BLOCK check_1w_temp (* EXTENDS //base type IMPLEMENTS //interface type list *) VAR NON_RETAIN (* add local variables here *) first_run: bool:= TRUE; prev_temp: real:= 999.99; filter: LIB.CORE.V1_0.B86_FILTER; END_VAR VAR_INPUT (* add in variables here *) actual_temp: real:= 0; err_diff: real:= 5; por_diff: real:= 1; filter_const: real:= 60; min_temp_allowed: real:= -55; max_temp_allowed: real:= 125; END_VAR VAR_OUTPUT outtemp: real; err_measure: bool:=FALSE; (* add out variables here *) END_VAR (*function block body*) //first run IF first_run THEN outtemp:=actual_temp; prev_temp:=actual_temp; err_measure:=FALSE; first_run:=FALSE; RETURN; END_IF; //filter out impossible values IF actual_temp > max_temp_allowed OR actual_temp < min_temp_allowed THEN outtemp:=prev_temp; err_measure:=TRUE; RETURN; END_IF; //filter out POR 85.0C errorrs IF abs(prev_temp-actual_temp)>=por_diff AND actual_temp = 85.0 THEN err_measure:= TRUE; outtemp:=prev_temp; //and filter measurre errors ELSIF abs(prev_temp-actual_temp)>=err_diff THEN err_measure:=TRUE; outtemp:=prev_temp; //prev_temp:=actual_temp; ELSE outtemp:=actual_temp; prev_temp:=actual_temp; err_measure:=FALSE; END_IF; //apply analog filer -> smooth the signal IF err_measure = FALSE AND filter_const > 0 THEN filter(IN:= actual_temp, INDT:= filter_const, OUT=>outtemp); END_IF; END_FUNCTION_BLOCKAnd the graph:

0_1510556313991_1w_graph.png