Emerson 20/20 service manual Refer to -2. Analog Inputs Motor Current

Page 20

Section 3 • Hardware Architecture

High Level Shutdown Input:

•This input must be energized in order for the com- pressor to operate. If de-energized, the compressor will shut down and issue a high level trip.

Oil Level Float Switch #1 Input:

•Used for Cool Compression. Oil Level Float Switch #2 Input:

•Used for Cool Compression. Remote Select #1/#2 Input:

•This input enables or disables remote I/O control. Energizing this input enables the Remote Capacity Increase and Remote Capacity Decrease inputs.

Remote Start/Stop Input:

•If the compressor is enabled for remote I/O control, this input is enabled. Energizing this input will issue a start for the compressor as long as it is available to run. De-energizing this input stops the compressor.

Remote Capacity Increase Input:

NOTE

The scan interval on the remote increase and decrease inputs is approximately ONE SECOND. Please take that into account when developing a control scheme using the remote increase and remote decrease inputs for compressor control.

•If the compressor is enabled for remote I/O control, this input is enabled. Operational only when the com- pressor is running. Energizing this input will increase the slide valve position.

•The slide valve will continuously increase as long as this input is energized. The slide valve will not in- crease when this input is de-energized.

Remote Capacity Decrease Input:

•Operational only when the compressor is running. This input is enabled if the compressor is enabled for remote I/O control. Energizing this input will de- crease the slide valve position. The slide valve will continuously decrease as long as this input is ener- gized. The slide valve will not decrease when this in- put is de-energized.

Condenser Step #1 Output:

•This output is enabled when condenser control op- tion is selected. A condenser fan or pump will be turned on or off by this output.

Condenser Step #2 Output:

•This output is enabled when condenser control op- tion is selected. A condenser fan or pump will be turned on or off by this output.

Condenser Step #3 Output:

•This output is enabled when condenser control op- tion is selected. A condenser fan or pump will be turned on or off by this output.

Condenser Step #4 Output:

•This output is enabled when condenser control op- tion is selected. A condenser fan or pump will be turned on or off by this output.

Auxiliary Inputs #1 - #8:

•Optional inputs that can be configured as an alarm or trip. Typically connected to external switched devices.

Auxiliary Outputs #1 - #4:

•Optional inputs that can be configured as an alarm or trip. Typically connected to external switched devices.

Analog Inputs

Refer to Table 2-2. Analog Inputs.

Motor Current:

•Default is a 0-5 Amp current transformer (CT). Current transformer ratio is set in the calibration screen.

Suction Pressure:

•Default signal is 4-20mA. Suction pressure trans- ducer range and calibration is set in the calibration screen.

Discharge Pressure

•Default signal is 4-20mA. Discharge pressure trans- ducer range and calibration is set in the calibration screen.

Oil Filter Inlet Pressure:

•Default signal is 4-20mA. Oil filter pressure trans- ducer range and calibration is set in the calibration screen.

Oil Manifold Pressure:

•Default signal is 4-20mA. Oil manifold pressure trans- ducer range and calibration is set in the calibration screen.

Economizer Pressure:

•Default signal is 4-20mA. Economizer pressure trans- ducer range and calibration is set in the calibration screen.

Slide Valve Position:

•Reads the 0-5 volt signal back from the slide posi- tion motor actuator to indicate current slide valve position.

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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.8.5153

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Contents Vission 20/20 micro-controller Page Table of Contents TOC Digital I/O Board Layout Top Status BarCompressor Sequencing Event List Data Backup List of Tables and Figures END of TOC How to Use This Manual Operational Flow Charts Requirements to Start CompressorCritical Compressor Run Logic at Compressor Start Compressor Amperage Load LimitingOperational Flow Charts 2 Voltage Source Installation RecommendationsProper Wiring Sizing Mixing Voltages DC signalsGrounding Wiring Methods Correct Transformer Wiring MethodBest Practices Hardware Architecture OverviewDigital Input/Output I/O Digital I/O 1 Board Description TypeAnalog Inputs Refer to -2. Analog Inputs Motor CurrentDigital I/O 2 Analog Inputs 1Analog Outputs Digital & Analog I/O Boards LayoutAnalog Inputs 2 Digital I/O Board LayoutDigital Output Boards Digital Output Board LayoutDigital Input Boards Digital Input Board LayoutDigital In-Out Boards Digital Input-Output Board LayoutAnalog Input Boards Analog Input Board LayoutChannel Signal Analog Input Jumper TablesJP-13 JP-14 JP-15 JP-31 Analog Output Boards Analog Output Board LayoutMain Screen Main ScreenTop Status Bar Parameter Bar Unit Start Pop-Up Window Bottom Status Bar Splash Screen Menu Screen Navigation ButtonsMenu Screen Compressor Control Pulse Proportional ControlAuto-Cycle Proportional Band & SetpointVariable Frequency Drive VFD VFD One-Step Control MethodPumpdown Control Pulldown Control Control Mode Volume Slide Position OffsetStop Load and Force Unload Capacity Slide Triggered OutputsLiquid Injection Load AnticipatingOil Control Compressor Control Alarms and Trips Alarms and Trips SetpointsAlarms and Trips Safety Failure Messages Compressor InhibitsFalse Start Timers Timer SetpointsOil Separator Level #2 Safety Trip Delay Timers Blank Compressor Scheduling Scheduling SetpointCompressor Scheduling Compressor Sequencing Pressure Control SetpointsCFM Equipment List 10 4 / Blank Condenser Control Condenser Control SetpointStep Control VFD Settings Step Control Screen11 4 / Blank Service Options Digital OutputsAnalog Outputs Pressure and Temperature Inputs Instruments CalibrationMotor Current Remote CapacityAnalog Inputs 13 4 / Blank Slide Calibration Capacity Slide Valve PotentiometerSlide Valve Actuator Calibration for Optical Style Motors Volume Slide Valve PotentiometerSlide Valve Operation Photochopper Command Shaft Rotation Command Shaft Rotation Required By ActuatorSlide Valve Troubleshooting Guide Slide Valve Troubleshooting Guide 1Slide Valve Troubleshooting Guide 2 Slide Valve Actuator Troubleshooting Guide Blink Code LED Blink Codes and Troubleshooting Guide 1LED Blink Codes and Troubleshooting Guide 2 Pleted. The actuator will not move while this error codeTrend Chart Chart OperationTrend Data Storage Setup Trend Setup Screen15 4 / Blank Event List Event list Columns16 2 / Blank Input / Output Input/Output Screen17 2 / Blank Auxiliary Input / Output Digital InputsDigital Outputs Control 18 4 / Blank Time & Date ConfigurationUnits Anti-Recycle CommunicationsTouchscreen Restart On Power Failure Compressor SequencingLanguage Model & RefrigerantCompressor Control Optional Function SelectionCondenser Control Oil PumpOil Cooling Motor Current DeviceDigital Inputs Analog Inputs Analog Outputs Configuration 19 10 / Blank Data Backup Save / LoadData Backup Factory Reset Migrate20 4 / Blank Maintenance ChecklistChart LogUser Access ApplyLogin Manage AccountsSecurity Access Levels Screen Security Levels22 4 / Blank Screen Features Help ScreenVersion Pop-Up Screen Twin Screw Control Twin Screw Control ScreenOperation Cool Compression Control Cool Compression Control ScreenControl Functions Cool Compression Control Functions ScreenAuto Load Timer Operational Differences from Single ScrewCool Compression Control

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