Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14… CC1U7471en
6 The settings in detail 28.01.2015
Line no. Operating line
5976 Function value 2 H4
The linear characteristic is defined by 2 fixed points. The setting uses 2 pairs of
parameters for function value and voltage value (F
1/U1 and F2/U2). At input H4
(frequency input), a frequency value is assigned to the function value – and not a
voltage value.
 Example of consumer request VKx 10V
Flow
temperature
setpoint
[
°
C
]
Voltage at Hx
F2 = 80
U2
=
10
V
U1
=
0
V
F1 = 0
0.15
V
F2 = 60
7471d09e/0111
Figure 89: Inputs Hx – Flow temperature setpoint
Key
F1 Function value 1
F2 Function value 2
U1 Frequency value 1
U2 Frequency value 2
If the input signal drops below the limit value of 0.15 V, the request for heat becomes
invalid, which means it has no impact.
 Example of pressure measurement 10 V:
U2 = 3.5 V
4 bar
0
F2 = 40
2 bar
1 bar
U1 = 0.5 V
F2 = 20
F2 = 10
F1 = 0
7471d10e/1210
Pressure value [bar]
Voltage at Hx
Figure 90: Inputs Hx – Pressure measurement 10 V
Function value = pressure value [bar]/0.1 bar
Key
F1 Function value 1
F2 Function value 2
U1 Frequency value 1
U2 Frequency value 2
Function value 2 H4

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English