Safety
information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
Basic
parameters
Running the
motor
Optimization
NV Media Card
Operation
Building
Automation
Advanced
parameters
Technical
data
Diagnostics
UL listing
information
164 HVAC Drive H300
Issue Number: 3
Pr 14.001 is the output (limited by Pr 14.013 and Pr 14.014) from PID 1
before scaling (Pr 14.015) is applied. It is derived from the following
algorithm:
Output = Error x [Kp + Ki/s + Kds/(0.064s + 1)]
Where:
Error = Reference (Pr 14.003, Pr 14.025) - Feedback
(Pr 14.004)
Kp = proportional gain (Pr 14.010)
Ki = integral gain (Pr 14.011)
Kd = differential gain (Pr 14.012)
Therefore with an error of 100% and Kp = 1.000, the output produced by
the proportional term is 100%. With an error of 100% and Ki = 1.000 the
output produced by the integral term will increase linearly by 100% every
second. With an error that is increasing by 100% per second and Kd =
1.000 the output produced by the differential term will be 100%. A filter
with a 64 ms time constant is applied to the differential term to reduce
noise.
The PID reference is the sum of the digital reference (Pr 14.025) and the
value from the location defined by the source parameter (Pr 14.003).
Before the reference is applied to the controller algorithm, it can be
scaled by setting Pr 14.023 to a value other than one and/or inverted by
setting Pr 14.005 = 1.
The feedback is the sum of the digital feedback (Pr 14.026) and the
value from the location defined by the source parameter (Pr 14.004).
Before the reference is applied to the controller algorithm, it can be
scaled by setting Pr 14.024 to a value other than one and/or inverted by
setting Pr 14.006 = 1.
Pr 14.007 defines the time taken for the reference input to ramp from 0
to 100% following a 0 to 100% step change in input.
PID 1 is enabled when Pr 14.008 = 1 and both the parameter sources
defined by Pr 14.009 and Pr 14.027 have a value of one. (The source
value for Pr 14.009 or Pr 14.027 appears as one if the parameter is set
to 0.0.) By default, Pr 14.009 is set to 10.001 (Drive Heathy) so that the
PID controller is disabled if the drive is tripped. When the PID controller
is disabled the output is zero and all the internal state variables (i.e.
integrator accumulator etc.) are held at zero.
If Pr 14.018 is zero, the upper limit (Pr 14.013) defines the maximum
positive output for the PID controller and the lower limit defines the
minimum positive or maximum negative output. If symmetrical limits are
selected, i.e. Pr 14.018 =c1, then the upper limit defines the maximum
positive or negative magnitude for the PID output. When any of the limits
is active then the integrator accumulator is held.
14.001 PID 1 output
14.031 PID 2 output
RO Bi NC PT
Ú
±100.00
Ö
14.002 PID main reference source parameter
RW Uni PT US
Ú
Pr 0.000 to Pr 50.099
Ö
Pr 0.000
14.003 PID 1 reference source parameter
14.033 PID 2 reference source parameter
RW Uni PT US
Ú
Pr 0.000 to Pr 50.099
Ö
Pr 0.000
14.004 PID 1 feedback source parameter
14.034 PID 2 feedback source parameter
RW Uni PT US
Ú
Pr 0.000 to Pr 50.099
Ö
Pr 0.000
14.005 PID 1 reference invert
14.035 PID 2 reference invert
RW Bit US
Ú
OFF (0) or On (1)
Ö
OFF (0)
14.006 PID 1 feedback invert
14.036 PID 2 feedback invert
RW Bit US
Ú
OFF (0) or On (1)
Ö
OFF (0)
14.007 PID 1 reference slew-rate limit
14.037 PID 2 reference slew-rate limit
RW Uni US
Ú
0.0 to 3200.0 s
Ö
0.0
14.008 PID 1 enable
RW Bit US
Ú
OFF (0) or On (1)
Ö
OFF (0)
14.009 PID 1 optional enable source parameter 1
RW Uni PT US
Ú
Pr 0.000 to Pr 50.099
Ö
Pr 0.000
14.010 PID 1 proportional gain
14.040 PID 2 proportional gain
RW Uni US
Ú
0.000 to 4.000
Ö
1.000
14.011 PID 1 integral gain
14.041 PID 2 integral gain
RW Uni US
Ú
0.000 to 4.000
Ö
1.000
14.012 PID 1 differential gain
14.042 PID 2 differential gain
RW Uni US
Ú
0.000 to 4.000
Ö
1.000
14.013 PID 1 output upper limit
14.043 PID 2 output upper limit
RW Uni US
Ú
0.00 to 100.00 %
Ö
100.00
14.014 PID 1 output lower limit
14.044 PID 2 output lower limit
RW Uni US
Ú
±100.00 %
Ö
-100.00
To Next Page
Loading...
