Delta VFD-EL-W Series User Manual

Chapter 4 Parameters｜VFD-EL-W
134
source cannot be the same.
 Negative feedback: Error = Target value (set point) – Feedback. Use negative feedback when
the detection value increases if the output frequency increases.
 Positive feedback: Error = - Target value (set point) + Feedback. Use positive feedback when the
detection value decreases if the output frequency increases.

10.11
PID Target Value
Default: 0.00
Settings
0.00–400.00 Hz
 Sets the target value when Pr.10.00 (PID Set Point Selection) is set to 4.

10.02
Proportional Gain (P)
Default: 1.0
Settings
0.0–10.0
 Gain P responds to the degree of deviation, and the deviation is reduced proportionally by
setting this parameter.
 Increasing Gain P can speed up the system response and reduce the steady-state error. But if
you set the value too high, it may cause overshoot and system oscillation, and reduce the
system stability. Decrease the setting value may slow down the system response, but it can
increase the system stability.
 If you set the other two gains (I and D) to zero, proportional control is the only effective
parameter.

10.03
Integral Time (I)
Default: 1.00
Settings
0.00–100.0 sec.
 Use the integral controller to eliminate the deviation during stable system operation. The integral
control does not stop working until the deviation is zero. The integral is affected by the integral
time. The smaller the integral time, the stronger the integral action. It is helpful to reduce
overshoot and oscillation for a stable system. Accordingly, the speed to lower the steady-state
deviation decreases. The integral control is often used with the other two controls for the PI
controller or PID controller.
 Sets the integral time of the I controller. When the integral time is long, there is a small I
controller gain, with slower response and slow external control. When the integral time is short,
there is a large I controller gain, with faster response and rapid external control.
 When the integral time is too short, it may cause overshoot or oscillation for the output frequency
and system.
 Set Integral Time to 0.00 to disable the I controller.

10.04
Differential Time (D)
Default: 0.00
Settings
0.00–1.00 sec.
 Use the differential controller to show the system deviation change, as well as to preview the
change in the deviation. You can use the differential controller to eliminate the deviation in order

Delta VFD-EL-W Series Specifications

General

Brand	Delta
Model	VFD-EL-W Series
Category	DC Drives
Language	English

Summary

Delta Sensorless Vector Control Compact Drive VFD-EL-W Series

Safety Precautions Before Installation

Disconnect AC Input Power

Safety precaution: Always disconnect AC input power before wiring.

Capacitor Charge Warning

Safety precaution: DC-link capacitors may retain hazardous voltage even after power is off.

Static Sensitive Components

Safety precaution: MOS components are sensitive to static electricity; use anti-static measures.

No Internal Modifications

Safety precaution: Do not modify internal components or wiring of the AC motor drive.

Proper Grounding

Safety precaution: Ensure proper grounding of the AC motor drive using the ground terminal.

Installation Location Restrictions

Safety precaution: Avoid installing the drive in high temperature or flammable environments.

Output Terminal Wiring

Post-Wiring Short Circuit Check

Qualified Personnel Only

Chapter 2: Installation and Wiring

General Wiring Diagrams

NPN and PNP Mode Wiring

Main Circuit Connection Precautions

Control Terminals Description

Analog Input Signal Handling

Grounding and Wiring Precautions

Chapter 3: Keypad and Start-up

Digital Keypad Overview

Operation Method Selection

Selection of operation modes: communication, digital keypad, or external signals.

Trial Run Procedure

Procedure for performing a trial run, including checks and motor rotation direction.

Chapter 4: Parameters

User Parameters Description

Basic Parameters

Operation Method Parameters

Parameters for selecting frequency command sources and operation command sources.

Input Function Parameters

Multi-Step Speed Operation

Protection Parameters

Parameters for over-voltage, over-current stall prevention, and over-torque detection.

Motor Parameters

Parameters for setting motor rated current, no-load current, auto-torque compensation, and auto-tuning.

Special Parameters

Communication Parameters

Parameters for communication address, transmission speed, fault treatment, and protocol selection.

PID Control Parameters

Parameters for PID set point selection, input terminals, and proportional/integral/differential gains.

Parameter Settings for Applications

Application-specific parameter settings for speed search, DC brake, energy saving, and multi-step speed.

Chapter 5: Troubleshooting

Over-Current (oc) Troubleshooting

Flowchart for troubleshooting over-current faults, including checks for short circuits and load.

Over-Voltage (ov) Troubleshooting

Flowchart for troubleshooting over-voltage faults, including checks for deceleration time and brake units.

Low Voltage (Lv) Troubleshooting

Flowchart for troubleshooting low voltage faults, including power supply and component checks.

Overheat (oH1) Troubleshooting

Flowchart for troubleshooting overheat faults, including checks for load, fans, and ambient temperature.

Overload (oL) Troubleshooting

Flowchart for troubleshooting overload faults, including checks for settings and load.

Keypad Display Abnormal Troubleshooting

Phase Loss (PHL) Troubleshooting

Motor Does Not Run Diagnosis

Comprehensive flowchart for diagnosing why the motor does not run, covering various checks.

Motor Speed Cannot Be Changed Troubleshooting

Motor Stalls during Acceleration Troubleshooting

Unexpected Motor Operation Troubleshooting

Chapter 6: Fault Code Information and Maintenance

Fault Code Information

Displays fault names, descriptions, and corrective actions for common faults like Over-current and Over-voltage.

Maintenance and Inspections Schedule

Resetting the Drive After Fault

Instructions on how to reset the drive after a fault, using the RESET key or communication.

Appendix C: Selecting the Right AC Motor Drive

Capacity Formulas for Motor Selection

Formulas for calculating starting capacity and current for single and multiple motor drives.

General Precautions for AC Motor Drive Selection

Choosing a Suitable Standard Motor

Considerations for Special Motors