Optidrive HVAC User Guide V2.00
www.invertekdrives.com
39
9
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Par
Parameter Name
Minimum Maximum
Default
Units
P3-09 PID Output Limit Select
0
3
0
-
0 : Digital Output Limits
. The output range of the PID controller is limited by the values of P3-07 & P3-08
1 : Analog Input 1 Provides a Variable Upper Limit
. The output range of the PID controller is limited by the values of P3-08 & the
signal applied to Analog Input 1
2: Analog Input 1 Provides a Variable Lower Limit
. The output range of the PID controller is limited by the signal applied to
Analog Input 1 & the value of P3-07
3: PID output Added to Analog Input 1 Value
. The output value from the PID Controller is added to the speed reference applied
to the Analog Input 1
P3-10 PID Feedback Source Select
0
1
0
-
Defines the source of the PID control feedback (location of the feedback sensor)
0 : Analog Input 2
: 0 – 100.0%
1 : Analog Input 1
: 0 – 100.0%
2 : Motor current
: 0 – 100.0% of P1-08 Value
3 : DC bus voltage
: 0 – 1000 Volt = 0 – 100.0%
4 : Analog input 1 – Analog input 2
: Differential of Analog 1 – Analog 2 = 0 – 100.0%
5 : Larger value between AnIn1 and AnIn2
: The greater of Analog input 1 or Analog Input 2 is always used
P3-11 PID Error to Enable Ramp
0.0
25.0
0.0
%
Defines a threshold PID error level, whereby if the difference between the set-point and feedback value is less than the set
threshold, the internal ramp times of the drive are disabled to allow the drive to react quickly to small errors. Where a greater
PID error exists, the ramp times are enabled to limit the rate of change of motor speed.
Setting to 0.0 means that the drive ramps are always enabled. This parameter is intended to allow the user to disable the drive
internal ramps where a fast reaction to the PID control is required, however by only disabling the ramps when a small PID error
exists, the risk of possible over current or over voltage trips being generated are reduced.
P3-12 Feedback Display Scaling
0.000
50.000
0.000
-
Applies a scaling factor to the displayed PID feedback, allowing the user to display the actual signal level from a transducer, e.g. 0
– 10 Bar etc.
P3-13 Feedback Wake Up Level
0.0
100.0
0.0
%
Sets a programmable level whereby if the drive enters standby mode whilst operating under PID control, the selected feedback
signal must fall below this threshold before the drive will return to normal operation.
P3-14 Standby Activation Speed
0.0
P1-01
0
Hz / Rpm
Determines the level at which the drive will enter into standby mode. P2-27 must be set with a value (time) for standby function
to be active. Drive enters standby mode if motor speed remains below the level set in P3-14 for the time period set in P2-27.
P3-15 2
nd
PID Digital Reference Value
0.0
100.0
0.0
%
When P3-05 = 0, and the 2
nd
digital reference is selected (see Digital Input Functions – Section 10.* this parameter sets the preset
digital reference (set-point) used for the PID Controller
P3-16 Pump Prime Time
0
600
0
Seconds
A value other than zero in this parameter will automatically enable burst pipe protection function. Each time the drive is enabled
whilst in PID control or is switched to PID control, the drive will monitor the PID feedback level for the time entered in P3-16. If
the PID feedback level does not exceed the threshold entered in P3-17 before the time in P3-16 expires then the drive will trip
with "Pr-Lo" (pressure low) trip.
P3-17 Burst Pipe Threshold
0.0
100.0
0.0%
%
PID feedback threshold for the burst pump control. In direct PID mode, PID feedback should be less than or equal to this
threshold before the pump prime time (P3-16) expires. In inverse PID mode, PID feedback should be larger than or equal to the
threshold before the pump prime time (P3-16) expires.
P3-18 PID Reset Control
0
1
0
-
This parameter is used to control the reset behaviour of the PID loop.
0: PID loop will continue running as long as P gain (P3-0* is not zero.
1: PID loop will only run when drive is enabled. If drive is not running, PID output will reset to 0 (Including integral result)
9.3.
Parameter Group 4 – High Performance Motor Control
Incorrect adjustment of parameters in menu group 4 can cause unexpected behaviour of the motor and any connected
machinery. It is recommended that these parameters are only adjusted by experienced users.
Par
Parameter Name
Minimum Maximum
Default
Units
P4-02 Auto-tune Enable
0
1
0
-
When set to 1, the drive immediately carries out a non-rotating auto-tune to measure the motor parameters for optimum
control and efficiency. Following completion of the auto-tune, the parameter automatically returns to 0.
P4-07 Maximum Motoring Current Limit
20.0
150.0
110.0
%-
This parameter defines the maximum current limit or reference used by the drive.
P4-12 Thermal Overload Value Retention
0
1
0
-
0 : Disabled.
1 : Enabled
. All Optidrives feature electronic thermal overload protection for the connected motor, designed to protect the
motor against damage. An internal overload accumulator monitors the motor output current over time, and will trip the drive if
the usage exceeds the thermal limit. When P4-12 is disabled, removing the power supply from the drive and re-applying will reset
the value of the accumulator. When P4-12 is enabled, the value is retained during power off.
