Emerson 20/20 service manual Analog Outputs, Digital & Analog I/O Boards Layout

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Section 3 • Hardware Architecture

Volume Position:

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

Suction Temperature:

•Default signal is RTD. Suction temperature calibra- tion is set in the calibration screen.

Discharge Temperature:

•Default signal is RTD. Discharge temperature calibra- tion is set in the calibration screen.

Oil Separator Temperature:

•Default signal is RTD. Oil separator temperature cali- bration is set in the calibration screen.

Oil Manifold Temperature:

•Default signal is RTD. Oil manifold temperature cali- bration is set in the calibration screen.

Process Temperature:

•Default signal is 4-20mA. Process temperature cali- bration and range are set in the calibration screen.

Chiller Inlet Temperature:

•Default signal is 4-20mA. Measures separator level. Chiller Inlet Temperature calibration and range are set in the calibration screen.

Condenser Pressure:

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

Remote Caphold:

•Default signal is 4-20mA. Active in “Direct I/O” mode. Adjusts the capacity of the compressor from 0-100%, proportional to the 4-20mA signal.

Auxiliary #1 - #16:

•Flexible analog inputs that can be configured to con- trol, alarm or trip.

Analog Outputs:

Refer to Table 2-3. Analog Outputs.

Compressor VFD:

•4-20mA output to control compressor motor speed with a Variable Frequency Drive (VFD).

Condenser VFD:

•4-20mA output to control one condenser fan which is interleaved between the remaining condenser steps for smoother control.

% Slide Valve Position:

•4-20mA signal that transmits the slide valve position for remote monitoring.

Motorized Valve (V+):

•For a cool compression compressor, this 4-20mA signal controls a motorized valve to regulate the liq- uid refrigerant level in the oil separator. For a liquid injection application on a standard single screw, this 4-20mA signal controls a motorized valve to regulate the liquid refrigerant injected into the compressor for oil cooling purposes.

Digital & Analog I/O Boards Layout

It is important to install the boards in the proper layout. For the correct digital and analog input/output (I/O) board layout, see Figure 3-2. Digital I/O Board Layout.

Dipswitches

•Each board has a dipswitch which sets its communi- cations address so that it can communicate with the CPU board. The dipswitch settings must be correct or the I/O will not function.

Jumpers

•Jumpers are required on the analog boards to con- figure them for the type of sensors used. The jumper table for the analog board shows the optional jump- er configurations for sensors other than the default Vilter standard. If a different sensor is to be used, the jumpers on the analog board need to be changed. In addition, the configuration for this sensor must be changed in the Instrument Calibration screen. The following illustrations show the Vilter default con- figurations for the Vission 20/20.

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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 Critical Compressor Run Logic at Compressor Start Operational Flow ChartsRequirements to Start Compressor Compressor Amperage Load LimitingOperational Flow Charts 2 Proper Wiring Sizing Installation RecommendationsVoltage Source Grounding DC signalsMixing Voltages 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 Stop Load and Force Unload Control ModeVolume Slide Position Offset Capacity Slide Triggered OutputsOil Control Load AnticipatingLiquid Injection 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 Operation Volume Slide Valve PotentiometerSlide Valve Actuator Calibration for Optical Style Motors 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 Units ConfigurationTime & Date Touchscreen CommunicationsAnti-Recycle Language Restart On Power FailureCompressor Sequencing Model & RefrigerantCompressor Control Optional Function SelectionOil Cooling Condenser ControlOil Pump 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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