106
11.3 Fixed Parameter Sets
To save the operator time-consuming determination of P-, I- and D-control parameters for heating and
cooling, the “fixed control parameter sets” for adjusted applications can be loaded. In the event that
none of these parameter sets provides the desired control stability, because the controlled system
deviates from the norm, an individual set can be adjusted. See “PAr”, Section 7.1.
Determining the best fixed set for the application does not usually require knowledge of control
technique, as long as the following simple rules are observed:
1. Basic adjustment: parameter set 5.
2. If the selected set value is not reached after some time, the next lower fixed parameter set (e.g.
“PAr 4” instead of “PAr 5”) should be selected. See “PAr”, Section 7.1.
3. If the actual value exceeds the set value (overshoots) or oscillates from the set value, then the next
higher fixed parameter set should be selected (e.g. “PAr 6” instead of “PAr 5”).
See “ PAr ”, Section 7.1.
There are 10 such parameter sets available for the control of the fluid temperature. When the con-
sumer temperature is controlled (probe Sn2 connected), the fixed parameter sets are not activated and
cascade control is used.
Note: The set value will be reached more quickly if the actual value overshoots it slightly. If overshoot-
ing is unacceptable, a somewhat longer heating-up time is to be expected.
11.4 Terminal Markings for the RT 45
1 Input Acknowledgement “Heating 1”
2 Output L Acknowledgement “Heating 1”
3 Output L “Heating 1”
4 Output N “Heating 1”
5 Input Safety thermostat “Failure” NO
6 Output L Safety thermostat COM
7 Input Safety thermostat
“Operation” NC
8 Output N Solenoid valve cooling
9 Output L Solenoid valve cooling
10 Output PE Solenoid valve cooling
11 Output N Solenoid valve automatic
water refill
12 Output L Solenoid valve automatic
water refill
13 Output PE Solenoid valve automatic
water refill
14 Output N Solenoid valve pressure release
15 Output L Solenoid valve pressure release
16 Output PE Solenoid valve pressure release
17 Output L Solenoid valve blow out
18 Output N Solenoid valve blow out
19 Output L “Pumping”
20 Output L Acknowledgement “Pumping”
21 Input Acknowledgement “Pumping”
22 Output N “Pumping”
23 Bridge
24 Bridge
25 Bridge
26 Bridge
27 Input N Power supply
28 Input L Power supply
29 Input PE Power supply
30 Relay 1 COM
31 Relay 1 NO
32 Relay 1 NC
33 Output PE
34 Relay 2 COM
35 Relay 2 NO
36 Relay 2 NC
37 Input L1 Motor current measurement
38 Output L1 Motor current measurement
39 Input L2 Motor current measurement
40 Output L2 Motor current measurement
41 Input L3 Motor current measurement
42 Output L3 Motor current measurement
43 Input PE
44 Output PE
45 Input Sensor Sn1 (Pt100)
46 Input Sensor Sn1 (Pt100)
47 Input Sensor Sn2 (Pt100 or TC +)
48 Input Sensor Sn2 (Pt100 or TC –)
49 Output “Level 1”
50 Input “Level 1”
51 Input L1 Switch-over relay “Pumping-
Suction”
52 Output L1 Switch-over relay “Pumping-
Suction”
53 Input L2 Switch-over relay “Pumping-
Suction”
54 Output L2 Switch-over relay“Pumping-
Suction”
55 Input Acknowledgement
“Heating 2”
56 Output L Acknowledgement
“Heating 2”
57 Output L “Heating 2”
58 Output N “Heating 2”
115 VAC
115 VAC
230 VAC
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