- General Electric Computer Accessories User Manual
Table Of Contents
- Safety Symbol Legend
- Chapter 1 Overview
- Chapter 2 Faults and Troubleshooting
- Chapter 3 Paramters/Functions
- Introduction
- Diagnostic and Utility Functions
- Drive Configuration Functions
- General Setup Functions
- I/O Functions
- LAN Functions
- Motor Control Functions
- Protective Functions
- Custom User Faults
- DC Link Protection
- Ground Fault Protection (Fast)
- Hardware Fault Strings
- Heatsink Thermal Protection
- Line-Line Voltage Protection
- Motor Overtemperature Detection
- Phase Current Protection
- Timed Overcurrent Detection
- Transformer Overtemperature Detection
- Motor Ground Protection
- Phase Imbalance Monitor
- Line Monitor
- Phase Lock Loop
- Sequencer Functions
- Speed Reference Functions
- Speed/Torque Control Functions
- System Data Parameters
- Chapter 4 Wizards
- Introduction
- Introduction 4-1
- DAC Setup
- Drive Commissioning
- Drive Commissioning: Overview
- Drive Commissioning: Intelligent Part Number
- Drive Commissioning: Drive Units
- Drive Commissioning: AC Source Selection
- Drive Commissioning: Motor Nameplate Data
- Drive Commissioning: Motor Crossover Voltage
- Drive Commissioning: Motor Protection Class
- Drive Commissioning: Motor Poles
- Drive Commissioning: Motor Data Sheet
- Drive Commissioning: Motor Data Sheet - Equivalent Circuit Data
- Drive Commissioning: Motor Data Sheet - Flux Curve
- Drive Commissioning: Motor and Process Speed Referencing
- Drive Commissioning: Tachometer Support
- Drive Commissioning: Tachometer Pulses Per Revolution
- Drive Commissioning: Tachometer Loss Protection
- Drive Commissioning: Stopping Configuration
- Drive Commissioning: Flying Restart
- Drive Commissioning: X-Stop Configuration
- Drive Commissioning: X-Stop Ramp Time
- Drive Commissioning: Run Ready Permissive String
- Drive Commissioning: Starting and Stopping the Drive
- Drive Commissioning: Manual Reference
- Drive Commissioning: Maximum Speed References
- Drive Commissioning: Jog Speed Setpoints
- Drive Commissioning: Reference Ramp Bypass
- Drive Commissioning: Reference Ramp Mode
- Drive Commissioning: Reference Ramp Speed Independent Rates
- Drive Commissioning: Reference Ramp Speed Independent Rate Set Selection
- Drive Commissioning: Reference Ramp Programmed Acceleration Rates
- Drive Commissioning: Reference Ramp Programmed Acceleration Speeds
- Drive Commissioning: Reference Ramp Programmed Deceleration Rates
- Drive Commissioning: Reference Ramp Programmed Deceleration Speeds
- Drive Commissioning: DDI Increment and Decrement Rates (Local Mode)
- Drive Commissioning: Speed/Torque Regulator Configuration
- Drive Commissioning: Speed/Torque Regulator Modes
- Drive Commissioning: Torque Regulator Reference and Output
- Drive Commissioning: Torque with Speed Override Reference and Output
- Drive Commissioning: Torque with Speed Override Speed Error
- Drive Commissioning: Torque with Speed Override Stopping Behavior
- Drive Commissioning: Torque and Current Limits
- Drive Commissioning: Torque and Current Limits Uniform
- Drive Commissioning: Failed Calculation
- Drive Commissioning: Torque and Current Limit Selection
- Drive Commissioning: Normal Torque and Current Limits
- Drive Commissioning: Alternate Torque and Current Limits
- Drive Commissioning: Motoring Torque Limits
- Drive Commissioning: Generating Torque Limits
- Drive Commissioning: Current Limits
- Drive Commissioning: Power Dip Ride-Through
- Drive Commissioning: Parameter Calculation
- Drive Commissioning: Simulator Mode
- Drive Commissioning: Hardware Fault Strings in Simulator Mode
- Drive Commissioning: Simulator Mechanical Configuration
- Drive Commissioning: Exit Reminder
- Drive Commissioning: Conclusion
- Line Transfer Tuneup
- Motor Control Tuneup
- Panel Meter Setup
- Per Unit Setup
- Line Protection Setup
- Pulse Test
- Remaining Parameter Setup
- Simulator Setup
- Speed Regulator Tuneup
- Speed Regulator Tuneup: Model
- Speed Regulator Tuneup: System Inertia
- Speed Regulator Tuneup: Inertia Measurement Command
- Speed Regulator Tuneup: Speed Regulator Mode
- Speed Regulator Tuneup: Manual Regulator Tuneup
- Speed Regulator Tuneup: 1st Order Response
- Speed Regulator Tuneup: 2nd Order Response
- Speed Regulator Tuneup: 2nd Order Response with Stiffness Filter
- Speed Regulator Tuneup: Calculate Speed Regulator Gains Command
- Notes
- Chapter 5 Signal Mapping
- Appendix A Function Block Diagrams
- Index
- Reader Comments

GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 3 Paramters/Functions
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Function description
The Local Speed Reference function is part of the Speed Reference Generation
function. It forms a speed reference signal from the local source (the DDI).
The Local Speed Reference function produces a local speed reference. This becomes
the speed reference used by the Speed Reference Generation function if the drive is
in local mode (when Local mode active is True). Local mode is enabled using the
DDI Remote/Local button.
The local speed reference is formed by adjusting the reference around an initial
value. The initial value is specified by Local speed. To make the adjustment, press
the DDI speed increment (Speed +) and decrement (Speed –) buttons. Using the
increment and decrement buttons sets Local inc command and Local dec command
respectively. The speed reference increases when Local inc command is True and
decreases when Local dec command is True. The rate of change is defined by Local
Inc/Dec rate. The local speed reference is limited to values between zero and
Applied top RPM.
The calculation of the local speed reference described in the preceding paragraph
applies when Jog request is False. When Jog request is True, the local speed
reference is set to the value of Local jog speed. More information on Jog request is
available in the Sequencer Commands function help.
Related diagrams
• Speed Reference Generation (Ovr_RfSel)
Minimum Speed Limit
The Minimum Speed Limit function prohibits the speed reference from falling below
a specified magnitude.
Function inputs
The following table specifies the input variables of the Minimum Speed Limit
function.
Variable Description
Minimum speed
input
Speed reference which is the possibly reversed local or
remote speed reference (variable Speed reference). RPM
Function outputs
The following table specifies the output variables of the Minimum Speed Limit
function.
Variable Description
Minimum speed
output
Speed reference whose magnitude has been clamped to a
minimum value and which is the input to the Critical Speed
Avoidance function (variable Speed avd func input). RPM
Function configuration
The following table specifies the configuration parameters of the Minimum Speed
Limit function.
Parameter Description
Minimum speed Minimum speed reference magnitude. RPM