21
www.eltherm.com
21
www.eltherm.com
EXTERNAL SETPOINT
External setpoint 2-point
The actual value x is recorded via a temperature sensor or a
standard signal and converted into a digital signal. Before this
signal is sent to the controller, the actual value is corrected.
The corrected actual value is shown on the display.
The setpoint w comes from an external source as a standard
signal (0/4 to 20mA or 0/2 to 10V) and is converted into a digi-
tal signal. The converted value is shown on the display.
A hysteresis h can be set on the controller.
The control difference x
d
= (w - h) - x is formed in the control-
ler.
Parameters used
No. description
factory
setting
Own
setting
P17 low temperature alarm 1
-99
P18
Lower analog scaling value
(0/2V, 0/4mA)
0
P19
Upper analog scaling value
(10V, 20mA)
100
P28
power monitoring
load output
0
P40
power correction [%]
10
P41
min. ambient temperature
-30
P42
material selection
1
P43
insulation material
6
P44
thickness insulation material
6
P45
medium selection
2
P46
geometry
0
P47
pipe outer diameter metal
11
P48
pipe outer diameter plastic
3
P49
cooling times
0
P75
Low Level mode analog inputs/
outputs
0
Hybrid relay K1 (2-point)
If the control difference is x
d
< 0, the hybrid relay opens.
If the control difference is x
d
≥ 0, the hybrid relay closes
Control of an external SSR relay (2-point)
The external SSR relay is switched via a voltage signal from the
controller.
If the control difference is x
d
< 0, a 0/2V signal is sent to the
output and the SSR relay switches off.
If the control difference is x
d
≥ 0, a 10V signal is given to the
output and the SSR relay switches on.
Control of an external power contactor (2-point)
The external power contactor is switched via the controller's
safety relay.
If the control difference is x
d
< 0, the safety relay opens and
the external power contactor switches off.
If the control difference is x
d
≥ 0, the safety relay closes and
the external power contactor switches on.
Structure switch settings
No.
description
selection option
S01
Selection actual
value 1 (X1)
[1] = Pt100, 3-wire (AE1)
2 = Pt100, 2-wire (AE1)
3 = thermocouple type J (AE1)
4 = thermocouple type K (AE1)
5 = voltage input (AE3)
6 = current input (AE3)
S02
Selection actual
value 2 (X2)
5 = voltage input (AE4)
6 = current input (AE4)
S03
Select setpoint W
5 = external setpoint (AE4)
S04
Selection of output
function controller
[1] = two-point control
S05
Selection swit-
ching output
[1] = internal hybrid relay with
soft start
2 = external power contactor
3 = analog output clocked
Parameters used
No. description
factory
setting
Own
setting
P01 input variable 1 (X1)
Display only
P03 reference variable (W)
Display only
P04 current display
Display only
P05
output level at the proportional
controller/ steady controller
Display only
P06
time unit on the proportional
controller
Display only
P12 min. standstill time K1
0
P15 sensor correction 1
0
P16
Over temperature alarm 1
999
