13
www.eltherm.com
13
www.eltherm.com
Setpoint controller (W1) PWM
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 is set on the controller and shown on the
display.
The hysteresis h is set on the controller and indicates the
range in which the controller clocks.
The control difference x
d
= w - x is formed in the controller.
Hybrid relay K1 (PWM)
If the control difference is x
d
≤ h , the hybrid relay clocks.
If the control difference is x
d
> h , the hybrid relay remains
permanently closed.
If the control difference is x
d
< 0 , the hybrid relay remains
open.
Control of an external SSR relay (PWM)
The external SSR relay is switched via a voltage signal from the
controller.
If the control difference is x
d
≤ h , the analogue output and the
SSR relay clocks.
If the control difference is x
d
> h , a 10V signal is sent to the
output and the SSR relay switches on.
If the control difference is x
d
< 0 , a signal with 0/2V is sent to
the output and the SSR relay switches off.
Control of an external power contactor (PWM)
The external power contactor is switched via the controller's
safety relay.
If the control difference is x
d
≤ h , the safety relay clocks.
If the control difference is x
d
> h , the safety relay remains
permanently closed.
If the control difference is x
d
< 0 , the safety relay remains
open.
Structure switch settings
No.
description
selection option
S01
Selection actual
value 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)
S03
Select setpoint W
[1] = Fixed value W1
S04
Selection of output
function controller
2 = PWM
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 X1
Display only
P03 Reference variable W
Display only
P04 Current display
Display only
P10 Control setpoint 1 (=W1)
5
P11 Switching hysteresis
2
P12 min. standstill time K1
0
P13 largest adjustable setpoint 1
950
P14 smallest adjustable setpoint 1
-50
P15 sensor correction 1
0
P16
Over temperature alarm 1
999
P17 low temperature alarm 1
-99
P18 Lower analog scaling value
0
P19 Upper analog scaling value
100
Parameters used
No. description
factory
setting
Own
setting
P28
power monitoring
load output
0
P75
Low level mode analog inputs/
outputs
0
