18
Program 128- Burner requirement and solar power system (or feed pump)
No symbol for S3
Program 128:
Pump
A1
runs when:
S1
is greater than the threshold
min1
and
S1
is greater than
S2
by the difference
diff1
and
S2
has not exceeded the threshold
max1
.
Output
A3
switches on when
S4
falls below threshold
min3
.
Output
A3
switches off (dominant) when
S3
exceeds
max3
.
A1 = S1 > (S2 + diff1) & S1 > min1 & S2 < max1
A3 (on) = S4 < min3
A3 (off) = S3 > max3
All pr1:
The burner requirement (
A3
) only occurs via sensor
S4
.
Output
A3
switches on when
S4
falls below threshold
min3
.
Output
A3
switches off (dominant) when
S4
exceeds
max3
.
A3 (on) = S4 < min3
A3 (off) = S4 > max3
All pr2:
In addition, pump
A1
switches between sensors
S4
and
S2
(such as oil boiler - buffer - tank
system) when difference
diff2
is reached.
Pump
A1
runs when:
S1
is greater than the threshold
min1
and
S1
is greater than
S2
by the difference
diff1
and
S2
has not exceeded the threshold
max1
,
or
S4
is greater than threshold
min2
and
S4
is greater than
S2
by the difference
diff2
and
S2
has not exceeded
max2
.
A1
=
(S1
>
(S2
+
diff1) & S1 > min1 & S2 < max1)
or
(S4 > (S2 + diff2) & S4 > min2
& S2 < max1)
Required settings:
max1
… limit TK
S2
A1
max3
… burner req. off SP
S3
A3
min1
… switch-on temp. coll.
S1
A1
min2
… see all pr2
min3
…
burner req. on TK
S4
A3
diff1
…
collector
S1
– TK
S2
A1
diff2
… see all pr2
S1
min1
S2
max1
diff1
A1
Burner
A3
S4 min3
S3 max3
A1
S1
S2
S3
S4
A3