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22
operation manual
temperature contoller ELTC-MV2
BU 123
Revision 1
External setpoint proportional control according to
ambient temperature
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.
The time unit is defined via P49, with the parameters P42 to
P48 being included in the calculation in the refined operating
mode. During operation, the TU is continuously calculated
and adjusted to the current eviromental conditions.
Parameters used
No. description
factory
setting
Own
setting
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 (proportional control)
The load contact is open at ambient temperatures above the
setpoint (P10).
At ambient tempatures below the entered minimum ambient
temperature (P41) + 1/6 of the difference between the set-
point (maintaining temperature) and the minimum ambient
temperature, the load contact is closed.
At ambient termperatures in between, the controller runs in
cycle mode. The output level P05 is used as the basic display.
Control of an external SSR relay (proportional control)
The external SSR relay is switched via a voltage signal from the
controller.
The load contact is open at ambient temperatures above the
setpoint (P10).
At ambient temperatures below the entered minimum
ambient temperature (P41) + 1/6 of the difference between
the setpoint (maintaining temperature) and the minimum
ambient temperature, the load contact is permanently swit-
ched on.
At ambient temperatures in between, the controller runs in
cycle mode. The output level P05 is used as the basic display.
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
3 = Proportional control after
ambient temperature
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
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
P17
low temperature alarm 1
-99
