Operating Instructions

Chapter 4 - Parameters and Menu Structure
Parameters (M3)
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Siemens Industry, Inc.
Siemens BT300 HVAC Drive
DPD01809
Smart Infrastructure
2019-05-29
Pressure Loss Compensation (M3.12.6)
Table 63: Pressure Loss Compensation.
Structure
Parameter
Unit
Min
Max
Default
ID
Description
P3.12.6.1
Enable SP 1
Disabled
Enabled
Disabled
1189
Enables the drive to raise or lower
the setpoint depending on output
frequency. SP 1 Max Comp.
(P3.12.6.2) is the compensation at
maximum frequency. This can be
used with incorrectly placed
sensors. For example, if a
pressure sensor is placed far
away from the wanted pressure
and the error in the measurement
is in proportion to the flow/output
frequency.
0 = Disabled
1 = Enabled
P3.12.6.2
SP 1 Max Comp.
%
-214748.36
214748.36
0
1190
Value added proportionally to the
frequency.
Setpoint Compensation = SP 1
Max Comp. (P3.12.6.2) * (Output
Frequency [M2.2.1]) - Min
Frequency [P3.3.1])/(Max
Frequency [P3.3.2] - Min
Frequency [P3.3.1])
P3.12.6.3
Enable SP 2
Varies
Disabled
Enabled
Disabled
1191
Enables the drive to raise or lower
the setpoint depending on output
frequency. SP 2 Max Comp.
(P3.12.6.2) is the compensation at
maximum frequency. This can be
used with incorrectly placed
sensors. For example, if a
pressure sensor is placed far
away from the wanted pressure
and the error in the measurement
is in proportion to the flow/output
frequency.
0 = Disabled
1 = Enabled
P3.12.6.4
SP 2 Max Comp.
%
-214748.36
214748.36
0
1192
Value added proportionally to the
frequency.
Setpoint Compensation = SP 2
Max Comp. (P3.12.6.4) * (Output
Frequency [M2.2.1] - Min
Frequency [P3.3.1] / Max
Frequency [P3.3.2] - Min
Frequency [P3.3.1].)
PID Control Sequence Details
Dead band hysteresis (P3.12.1.9) and Dead band delay (P3.12.1.10)
The PID controller output is locked if the actual value stays within the dead band area around the reference
for a predefined time. This function prevents unnecessary movement and wear on actuators and valves.