Pid Controller Coefficients Of Delta-T Supervision; Summary Of All ∆T Parameters - Siemens LMU54 Series Basic Documentation

PID controller coefficients
of delta-T supervision
KpDt
TvDt
TnDt
Summary of all ∆T
parameters
No. DPA no.
1 180 QmodDrehzStufen
2 146 QmodMin
3 147 QmodMax
4 177 FoerderMin
5 176 FoerderMax
6 435 Klambda1
7 179 KtAbtastDt
KonfigRg7
Bit 0
Bit 1
Bit 2
8 182
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
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HVAC Products
This value is used in connection with the ∆T limitation for controlling the pump's degree
of modulation. With the ∆T supervision, «dTkTrMax» is the setpoint for the control of the
measured temperature differential between flow and return.
«dTkTrMax» can be set independently of «dTkTrNenn» and can even be greater than
«dTkTrNenn». When setting «dTkTrMax», the permissible temperature differential of the
associated heat exchanger must be observed.
If required.
Proportional coefficient of ∆T supervision
Derivative action time of ∆T supervision
Integral action time of ∆T supervision
Parameter name
Number of speeds of the
modulating pump
Minimum degree of
modulation
Maximum degree of
modulation
Minimum pump head
Maximum pump head
Filter time constant
Factor for sampling time
Configuration byte
Heating circuit pump
0: Multispeed;
1: Modulating
∆T
limitation
0: Inactive; 1: Active
∆T
supervision
0: inactive; 1: active
Plant volume
1,0: medium
∆T in reduced operation.
0: inactive; 1: active
Not relevant
Not relevant
Basic Documentation LMU54... / LMU64...
3 Functions
Function Setting level
OEM
OEM
OEM
OEM
OEM
OEM
OEM
Installer
Installer
Installer
Installer
Installer
Installer
Installer
Mandatory settings
OEM Installer
Yes If required
Yes If required
Yes If required
Yes If required
Yes If required
If required No
If required No
Yes No
Yes No
Yes No
No Yes
Yes No
No No
No No
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CC1P7494en
07.11.2002