Diagram 48
15
All Pr8:
This program enables controlling of two generators to each one consumer.
Output
A4
is switched with the difference
diff4
between
T2
and
T3
instead of burner re-
quirement.
T2
is available for an additional forth generator. In this case threshold
max4
oper-
ates at
T3
.
A1 = T1 > (T4 + diff1) & T4 < max1
A2 = T5 > (T4 + diff2) & T5 > min1 & T4 < max2
A3 = T6 > (T3 + diff3) & T6 > min2 & T3 < max3
A4 = T2 > (T3 + diff4) & T3 < max4
Program 60:
The whole function offers switching of two generators to one consumer and one
generator to two consumers. Output
A4
gets an additional difference function instead of
burner requirement.
A4
switches, if sensor
T6
is increasing
min2
and is greater than
T2
by
diff4
and
T2
has not exceeded
max4
.
A1 = T1 > (T4 + diff1) & T4 < max1
A2 = T5 > (T4 + diff2) & T5 > min1 & T4 < max2
A3 = T6 > (T3 + diff3) & T6 > min2 & T3 < max3
A4 = T6 > (T2 + diff4) & T6 > min2 & T2 < max4
T1 T5 T6 T2
min1 min2
diff1
A1 diff2 diff3 diff4
A2 A3 A4
T4 T3
max1 max3
max2 max4
Required settings:
diff1
…coll. T1 – TK T4
A1
diff2
…sf-boiler T5 – TK T4
A2
diff3
…oil boiler T6 – TK T3
A3
diff4
…generator T2 – TK T3
A4
min1
…switch-on temp. sfb T5
A2
min2
…switch-on temp. ogb T6
A3
max1
…limit TK T4
A1
max2
…limit TK T4
A2
max3
…limit TK T3
A3
max4
…limit TK T3
A4
T1 T5 T6
min1 min2
diff1
A1 diff2 diff3 diff4
A2 A3 A4
T4 T3 T2
max1 max3 max4
max2
Required settings:
diff1
…coll. T1 – TK T4
A1
diff2
…sf-boiler T5 – TK T4
A2
diff3
…oil boiler T6 – TK T3
A3
diff4
…oil boiler T6 – TK T2
A4
min1
…switch-on temp. sfb T5
A2
min2
…switch-on temp. ogb T6
A3,4
max1
…limit TK T4
A1
max2
…limit TK T4
A2
max3
…limit TK T3
A3
max4
…limit TK T2
A4