Beijer Electronics BFI-H2 V1.12 - Manual (Page 54)

User Guide Revision 1.12
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P2-39 Parameter Access Lock 0 1 0 -
0 : Unlocked. All parameters can be accessed and changed
1 : Locked. Parameter values can be displayed, but cannot be changed
P2-40 Extended Menu Access Code 0 9999 101 -
Defines the access code which must be entered in P1-14 to access parameter groups above Group 1
11.2. Parameter Group 3 – PID Control
Par Parameter Name Minimum Maximum Default Units
P3-01 PID Proportional Gain 0.1 30.0 1.0 -
PID Controller Proportional Gain. Instantaneous error between the feedback and the set-point in the PID controller is multiplied by
P3-01 to produce the output from the PID controller. Higher values of proportional gain produce a larger change in the drive output
frequency in response to changes in the PID set-point or feedback signals. Too high a value can cause instability
P3-02 PID Integral Time 0.0 30.0 1.0 Seconds
PID Controller Integral Time. Accumulated error in the PID control. Uses accumulated errors between set-point and feedback signals
to influence the output from the PID controller. P3-02 is the time constant for accumulating error. Larger values provide a more
damped response. Lower values result is a faster system response but may result in instability.
P3-03 PID Differential Time 0.00 1.00 0.0 Seconds
PID Differential Time Constant. The Differential time constant references the rate of change of the feedback signal over time and
works to slow the rate of change of the PID controller, particularly as it approached the set-point. Setting a shorter time will decrease
overshoot but slow down response and may lead to instability. Note: P3-03 is set to 0 by default which disables the differential time
constant. Care must be taken when adjusting this value outside of its default value.
P3-04 PID Operating Mode 0 1 0 -
0 : Direct Operation. Use this mode if an increase in the feedback signal should result in an decrease in the motor speed
1 : Inverse Operation. Use this mode if an increase in the feedback signal should result in a increase in the motor speed
P3-05 PID Reference Select 0 2 0 -
Selects the source for the PID Reference / Set-point
0 : Digital Preset Set-point. P3-06 is used
1 : Analog Input 1 Set-point
2 : Analog Input 2 Set-point
P3-06 PID Digital Reference Value 0.0 100.0 0.0 %
When P3-05 = 0, this parameter sets the preset digital reference (set-point) used for the PID Controller
P3-07 PID Output Upper Limit P3-08 100.0 100.0 %
Limits the maximum value output from the PID controller
P3-08 PID Output Lower Limit 0.0 P3-07 0.0 %
Limits the minimum output from the PID controller
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
1 : Analog Input 1
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.