Document Outline

• Cover
• Preface
• Contents
• Introduction
  • Features and Functions
    • Generator and Bus Protection and Metering
    • Engine Protection and Metering
    • Load Sharing
    • Event Recording
    • Data Logging
    • Contact Inputs and Outputs
    • Automatic Transfer Switch Control (Mains Failure)
    • Device Security
    • Communication
  • Style Number
  • Optional Features and Capabilities
    • AEM-2020 (Analog Expansion Module)
    • CEM-2020 (Contact Expansion Module)
• Specifications
  • Operating Power
    • Power Consumption
  • Battery Ride Through
  • Current Sensing
    • Generator CTs
    • Available Programmable CTs
    • 1 Aac Current Sensing
    • 5 Aac Current Sensing
  • Voltage Sensing
    • Generator Sensing
    • Bus 1 Sensing
    • Bus 2 Sensing (Optional with style number xxxxxxxEx)
  • Analog Sensing
    • Current Sensing
    • Voltage Sensing
  • Contact Sensing
    • Contact Input Recognition Time
    • Contact Output Closure Time
    • Terminals
  • Engine System Inputs
    • Fuel Level Sensing
    • Coolant Temperature Sensing
    • Oil Pressure Sensing
    • Engine Speed Sensing
  • Output Contacts
    • PRE (Prestart), START, and RUN Relays
    • Programmable Relays (12)
  • Metering
    • Generator and Bus Voltage (rms)
    • Generator Current (rms)
    • Generator and Bus Frequency
    • Apparent Power
    • Power Factor
    • Real Power
    • Oil Pressure
    • Coolant Temperature
    • Fuel Level
    • Battery Voltage
    • Engine RPM
    • Maintenance Timer
  • Generator Protection Functions
    • Overvoltage (59) and Undervoltage (27)
    • Underfrequency (81U) and Overfrequency (81O)
    • ROCOF (Rate of Change of Frequency) (81) (Optional)
    • Reverse and Forward Power (32)
    • Loss of Excitation (40Q)
    • Overcurrent (51) (Optional)
    • Phase Voltage Imbalance (47) (Optional)
    • Vector Shift (78) (Optional)
  • Logic Timers
  • Communication Interface
    • CAN (SAE J1939)
    • Ethernet
    • External Dial-Out Modem (RS-232)
    • IRIG-B Time Synchronization
    • Modbus™ (RS-485)
    • RDP-110
    • USB
  • Real-Time Clock
    • Clock Holdup
  • LCD Heater
  • Type Tests
    • Shock
    • Vibration
    • HALT (Highly Accelerated Life Testing)
    • Ignition System
  • Environment
  • UL Approval
  • CSA Certification
  • NFPA Compliance
  • CE Compliance
  • Physical
• Mounting
  • Hardware
  • Dimensions
• Terminals and Connectors
  • Terminals
    • Operating Power
    • Generator Current Sensing
    • Programmable Current Sensing
    • Generator Voltage Sensing
    • Bus Voltage Sensing
    • Engine Sender Inputs
    • Analog Inputs
    • Magnetic Pickup Input
    • Contact Sensing Inputs
    • Output Contacts
    • CAN Interface
    • RS-485 Interface
    • Automatic Voltage Regulator (AVR) Control
    • Governor (GOV) Control
    • Load Share Line
    • IRIG-B Connections
    • Optional Remote Display Panel Connections
  • Connectors
    • USB Interface
    • Ethernet Communications
    • RS-232 Interface
• Typical Applications
  • Connections for Typical Applications
  • Connections for Load Sharing
  • Analog Input Connections
  • CAN Connections
  • Expansion Module Connections (CAN 1)
  • Installation for CE Systems
• Controls and Indicators
  • Programmable Indicator Configuration
  • Display Operation and Navigation
    • Login and Permissions
    • Overview Screen and Configurable Metering
    • Sleep Mode
    • Changing a Setting
    • Front Panel Display Structure
    • System Configuration One-Line Diagram
    • Generator Network Status Display
  • Display Setup
    • LCD Contrast
    • Invert Display
    • Sleep Mode
    • LCD Backlight Timeout
    • Language Selection
    • Scrolling Screens
• Power Input
  • Nominal Voltage Input and Acceptable Range of Input Voltage
  • Terminal Assignments
  • Power Consumption
  • Battery Ride-Through Capability
  • Fuse Protection
• Voltage and Current Sensing
  • Generator Voltage
  • Bus Voltage
  • Generator and Bus Current
• Engine Sender Inputs
  • Connections
  • Compatibility
  • Operation
  • Programmability
  • Characteristic Curves
    • Curve Configuration
  • Sender Failure Detection
• Speed Signal Inputs
  • Magnetic Pickup
    • Terminals
  • Generator Sensing Voltage
    • Terminals
• Contact Inputs
  • Programmable Contact Inputs
    • Contact Input Configuration
    • Programmable Functions
• Analog Inputs
  • Input Setup
    • Label Text
    • Hysteresis
    • Input Type
    • Arming Delay
    • Out-of-Range Alarm Type
  • Ranges
  • Thresholds
    • Mode
    • Alarm Configuration
  • Operational Settings
  • Logic Connections
• Contact Outputs
  • Prestart
  • Start
  • Run
  • Relay Control
  • Programmable Contact Outputs
    • Programmable Output Configuration
    • Configurable Elements
• Operating Modes
  • Off
  • Run
  • Auto
    • ATS Contact Input
    • Generator Exerciser
    • Mains Fail Transfer Functionality
    • Run-with-Load Logic Element
    • Engine Run Logic Element
  • Operating Mode Control
• Breaker Management
  • Breaker Status
  • System Breaker Configuration
    • Initial System Setup
    • Generator Breaker Control
    • Generator and Mains Breaker Control
    • System Breaker Configuration Setting
    • Breaker Hardware Settings
    • Breaker Setup in BESTlogic™Plus
    • Bus Condition Detection
  • Breaker Operation
    • Breaker Operation Requests
    • Generator Breaker Closure Conditions
    • Mains Breaker Closure Conditions
    • General Breaker Closure Conditions
• Synchronizer
  • Operation
  • Configuration
    • Gen Condition Detection
    • Anticipatory versus Phase Lock Loop Synchronizer
• Bias Control
  • AVR Bias Control Settings
    • var/PF Control
  • Governor Bias Control Settings
• Multiple Generator Management
  • AVR Output
  • Governor Output
  • Load Share Output
  • Parameter Selection
  • Demand Start/Stop
    • Spinning Reserve
  • Generator Sequencing
    • Disabled
    • Staggered Service Time
    • Balanced Service Time
    • Largest Size First
    • Smallest Size First
    • Smallest Unit ID
  • Network Configuration
• Generator Protection
  • Undervoltage (27)
    • Element Operation
    • Logic Connections
    • Operational Settings
  • Overvoltage (59)
    • Element Operation
    • Logic Connections
    • Operational Settings
  • Phase Voltage Imbalance (47)
    • Element Operation
    • Logic Connections
    • Operational Settings
  • Vector Shift (78)
    • Element Operation
    • Open Mains Breaker or Gen Breaker on Trip
    • Logic Connections
    • Operational Settings
  • Frequency (81)
    • Frequency Measurement
    • Underfrequency and Overfrequency
    • Frequency Rate-of-Change
    • Logic Connections
    • Operational Settings
  • Overcurrent (51)
    • Element Operation
    • Logic Connections
    • Operational Settings
  • Power (32)
    • Element Operation
    • Logic Connections
    • Operational Settings
  • Loss of Excitation (40Q)
    • Element Operation
    • Logic Connections
    • Operational Settings
  • Setting Groups
    • Setting Group Functions
    • Logic Connections
• Configurable Protection
  • Element Setup
    • Parameter Selection
    • Label Text
    • Arming Delay
    • Hysteresis
    • Scale Factors
  • Thresholds
    • Alarm Configuration
    • Mode
  • Logic Connections
  • Operational Settings
• Metering
  • Metering Explorer
    • Front Panel
    • BESTCOMSPlus®
  • Engine
  • Generator
  • Bus 1 and Optional Bus 2
  • Bias Control
  • Power
  • Run Statistics
  • Synchronization
  • Status Indication
  • Inputs
    • Contact Inputs
    • Analog Inputs
    • Remote Contact Inputs
    • Remote Analog Inputs
    • Logic Control Relays
  • Outputs
    • Contact Outputs
    • Analog Outputs
    • Configurable Elements
    • Remote Contact Outputs
    • Remote Analog Outputs
  • Configurable Protection
  • J1939 ECU
    • ECU Data
    • Engine Configuration
  • MTU
    • MTU Engine Status
    • MTU Status
  • Summary
  • Control Panel
    • Emergency Stop
    • Engine Control
    • Run, Auto, Off
    • Generator and Mains Breakers
    • Switches 1 through 6
  • Generator Network Status
  • Generator Sequencing
  • Diagnostics
    • Control
    • Load Share
  • Analysis
• Reporting and Alarms
  • Event Logging
  • Sequence of Events
    • Setup
  • Data Logging
    • Setup
  • Trending
  • Alarms
    • Alarm Configuration
    • Pre-alarm Configuration
    • Horn Configuration
    • Sender Fail Settings
    • User Programmable Alarms
    • Retrieving Alarm Information
    • Resetting Alarms and Pre-Alarms
• BESTCOMSPlus®
  • System Recommendations
  • Installation
  • Activate the DGC-2020HD Plugin for BESTCOMSPlus®
    • Connect a USB Cable
    • Start BESTCOMSPlus® and Activate DGC-2020HD Plugin Automatically
    • Manual Activation of the DGC-2020HD Plugin
    • Establishing Communication
  • Menu Bars
    • Upper Menu Bar (BESTCOMSPlus® Shell)
    • Lower Menu Bar (DGC-2020HD Plugin)
  • Settings Explorer
  • Metering Explorer
  • BESTspace™
  • Settings File Management
    • Opening a Settings File
    • Saving a Settings File
    • Upload Settings and/or Logic to Device
    • Download Settings and Logic from Device
    • Print a Settings File
    • Compare Settings Files
  • Auto Export Metering
  • BESTCOMSPlus® Updates
  • Firmware Updates
• BESTlogic™Plus
  • Overview of BESTlogic™Plus
  • BESTlogic™Plus Composition
    • I/O
    • Components
    • Elements
  • Logic Schemes
    • The Active Logic Scheme
    • Sending a Logic Scheme to the DGC-2020HD
    • Retrieving a Logic Scheme from the DGC-2020HD
  • Programming BESTlogic™Plus
  • Offline Logic Simulator
  • BESTlogic™Plus File Management
    • Saving a BESTlogicPlus File
    • Opening a BESTlogicPlus File
    • Protecting a BESTlogicPlus File
    • Uploading a BESTlogicPlus File
    • Downloading a BESTlogicPlus File
    • Printing a BESTlogicPlus File
    • Clearing the On-Screen Logic Diagram
  • BESTlogic™Plus Examples
    • Example 1 - GENBRK Logic Block Connections
    • Example 2 - AND Gate Connections
    • Example 3 - Multiple Logic Connections
• Communication
  • USB
  • Ethernet
    • Ethernet Port Designations
    • Ethernet Setup through BESTCOMSPlus®
    • Establishing Ethernet Communication
  • CAN
    • ECU Limitations
    • CAN Bus Setup
    • ECU Setup
    • Speed Setup
    • Voltage Regulator Setup
  • RS-232
    • RS-232 Setup
    • External Modem
  • RS-485
  • Modbus™ Setup
  • Remote Display Panel (optional)
• Configuration
  • System Settings
    • System Type
    • Number Flywheel Teeth
    • Speed Signal Source
    • Power-Up Delay
    • Fuel Level Function
    • Fuel Level Source
    • Coolant Temperature Source
    • Oil Pressure Source
    • NFPA Compliance Level
    • EPS Supplying Load
    • System Units
    • Metric Pressure Units
    • System Breaker Configuration
    • Generator, Bus 1, and Bus 2 Labels
  • Rated Data
    • Sensing Transformer Ratings
    • Voltage Ratings
    • Current Ratings
    • Power Ratings
    • Sensing Configuration
    • Frequency
    • Battery Volts
    • Rated Engine RPM
  • Remote Module Setup
  • Crank Settings
    • Pre-Start
    • Restart
    • Cranking
    • Crank Disconnect
    • Cool Down
  • Automatic Restart Settings
  • Exercise Timer Settings
  • Sensing Transformer Ratings
    • Aux CT Mapping
    • Ground Current
  • Relay Control Settings
  • System Configuration Detection Settings
    • Single-phase Detect Threshold
    • Low-line Detect Threshold
    • Single-phase Detect Generator Connection
• Device Information
  • Style Number
  • Device Info
  • Firmware Updates
    • Upgrading Firmware in Expansion Modules
    • Upgrading Firmware in the DGC-2020HD
• Security
  • Access Levels
  • User Name Setup
  • Port Access Setup
  • Access Control
• Timekeeping
  • Clock Setup
    • Time Priority Setup
    • IRIG Decoding
    • Clock Not Set Warning
  • Setting the Time and Date
  • IRIG Port
    • Connections
    • Specifications
  • Real-Time Clock Specifications
  • Backup Battery for the Real-Time Clock
    • Battery Replacement Procedure
• Maintenance and Troubleshooting
  • Maintenance
  • Storage
  • Troubleshooting
    • Communications
      • Ethernet Communication Does Not Work Properly
      • USB Communication Does Not Work Properly
      • CAN Communication Does Not Work Properly
    • Inputs and Outputs
      • Programmable Inputs Do Not Operate as Expected
      • Programmable Outputs Do Not Operate as Expected
    • Metering/Display
      • Incorrect Display of Battery Voltage, Coolant Temperature, Oil Pressure, or Fuel Level
      • Incorrect Display of Generator Voltage
      • Incorrect Measurement or Display of Generator Current
      • Incorrect Display of Engine RPM
      • DGC-2020HD Indicates Incorrect Power Factor
      • LCD is Blank and all LEDs are Flashing at Approximately 2 Second Intervals
    • Generator Breaker and Mains Breaker
      • Generator Breaker Will Not Close to a Dead Bus
      • Generator Breaker Does Not Open When It Should
      • Mains Breaker Does Not Open When Mains Fails
      • Mains Breaker Does Not Close After Mains Returns
    • Synchronizer
      • Determining if the Synchronizer is Active
      • Synchronizer Not Active
      • Synchronizer Active for a Short Time, Then Stops
      • Synchronizer Does Not Lower Engine Speed Allowing Alignment of Bus and Generator
      • Synchronizer Does Not Raise Engine Speed Allowing Alignment of Bus and Generator
      • Synchronizer Does Not Lower the Generator Voltage to Achieve Matching of Bus and Generator Voltages
      • Synchronizer Does Not Raise Generator Voltage to Achieve Matching of Bus and Generator Voltages
    • Speed Bias
      • Engine Speed Does Not Change When Speed Bias Voltage Changes
      • Engine Speed Decreases When Speed Bias is Increased
      • Engine Speed Increases When Speed Bias is Decreased
    • Voltage Bias
      • Generator Voltage Does Not Change When Voltage Bias Changes
      • Generator Voltage Decreases When AVR Speed Bias is Increased
      • Generator Voltage Increases When Speed Bias is Decreased
    • Load Sharing
      • Generator Breaker Status is not being received by the DGC-2020HD
      • Generator Runs at Incorrect Speed when Generator Breaker is Closed
      • Generators Do Not Share Load Equally
      • Load Sharing Works Correctly, but a Single Unit Slows Down
    • DGC-2020HD Front Panel Diagnostics Screens
      • Load Share Line
      • Control
      • AEM-2020
      • CEM-2020
• AEM-2020
  • Features
  • Specifications
    • Operating Power
    • Analog Inputs
      • Burden
    • RTD Inputs
    • Thermocouple Inputs
    • Analog Outputs
    • CAN Interface
    • Type Tests
      • Shock
      • Vibration
      • Ignition System
      • HALT (Highly Accelerated Lift Testing)
    • Environment
      • Temperature
      • Humidity
    • UL Approval
    • CSA Certification
    • NFPA Compliance
    • CE Compliance
    • Physical
  • Functional Description
    • Analog Inputs
    • RTD Inputs
    • Thermocouple Inputs
    • Analog Outputs
    • Communications
  • Mounting
  • Connections
    • Terminations
    • Operating Power
    • AEM-2020 Inputs and Outputs
    • External Analog Input Connections
    • External RTD Input Connections
    • CAN Interface
  • AEM-2020 Configuration
  • Remote Analog Inputs Configuration
    • Input Setup
      • Label Text
      • Hysteresis
      • Input Type
      • Arming Delay
      • Out-of-Range Alarm Type
    • Ranges
    • Thresholds
      • Mode
      • Alarm Configuration
    • Logic Connections
    • Operational Settings
  • Remote RTD Inputs Configuration
    • Input Setup
      • Label Text
      • Hysteresis
      • Input Type
      • Arming Delay
      • Out-of-Range Alarm Type
    • Ranges
    • Thresholds
      • Mode
      • Alarm Configuration
    • Logic Connections
    • Operational Settings
  • Remote Thermocouple Inputs Configuration
    • Input Setup
      • Label Text
      • Hysteresis
      • Arming Delay
    • Thresholds
      • Mode
      • Alarm Configuration
    • Logic Connections
    • Operational Settings
  • Remote Analog Outputs Configuration
    • Output Setup
      • Parameter Selection
      • Output Type
      • Out-of-Range Alarm Type
      • Out-of-Range Activation Delay
    • Ranges
    • Operational Settings
  • Firmware Updates
  • Repair
  • Maintenance
  • Storage
• CEM-2020
  • Features
  • Specifications
    • Operating Power
      • Maximum Consumption
    • Contact Inputs
    • Contact Outputs
      • Ratings
        • CEM-2020
        • CEM-2020H
    • CAN Interface
    • Type Tests
      • Shock
      • Vibration
      • Ignition System
      • HALT (Highly Accelerated Lift Testing)
    • Environment
      • Temperature
      • Humidity
    • UL Approval (CEM-2020 Only)
    • UL Approval (CEM-2020H Only)
    • CSA Certification
    • NFPA Compliance
    • CE Compliance
    • Physical
      • Weight
      • Dimensions
  • Functional Description
    • Contact Inputs
    • Contact Outputs
      • CEM-2020
      • CEM-2020H
    • Communications
  • Mounting
  • Connections
    • Terminations
    • Operating Power
    • Contact Inputs and Contact Outputs
    • CAN Interface
  • CEM-2020 Configuration
  • Remote Contact Inputs Configuration
    • Input Setup
      • Alarm Configuration
      • Activation Delay
      • Label Text
      • Contact Recognition
    • Logic Connections
    • Operational Settings
  • Remote Contact Outputs Configuration
    • Label Text
    • Logic Connections
    • Operational Settings
  • Firmware Updates
  • Repair
  • Maintenance
  • Storage
• Time Curve Characteristics
  • Curve Specifications
  • Time Overcurrent Characteristic Curve Graphs
    • Time Dial Setting Cross-Reference
    • The 46 Curve
• Tuning PID Settings
  • Voltage and Speed Controllers
  • kW Load Controller
  • Var/PF Controller
  • Speed Trim Function
  • Tuning Parameters
  • Tuning Procedures
    • Voltage Controller Tuning Procedure
    • var/PF Controller Tuning Procedure
    • Speed Controller Tuning Procedure
    • kW Load Controller Tuning Procedure
  • Generic Gains for Multiple Machine Types
• MTU Fault Codes
• Exhaust Treatment
  • Diesel Particulate Filter (DPF)
    • Regeneration
    • DPF Control
    • DPF Status and Pre-Alarms
  • Exhaust After-Treatment Systems (EATS)
    • Pre-Alarms
    • Exit Conditions for DEF Severe Inducement
• Diagnostic Trouble Codes
• Revision History