Emerson 20/20 service manual Analog Outputs

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Section 12 • Service Options

of the volume actuator. The output is connected to terminal 15 and is the 5th LED down on card 1.

Volume Decrease Motor:

Activates the output assigned to the decrease input of the volume actuator. The output is connected to terminal 16 and is the 6th LED down on card 1.

Oil Separator Heater

Activates the output assigned to the oil separator heater. The output is connected to terminal 17 and is the 7th LED down on card 1.

Trip:

Deactivates the output during a trip or inhibit con- dition. This is a reverse acting output. The output is connected to terminal 18 and is the bottom LED on card 1.

Slide Valve Setpoint # 1 (Economizer):

Activates the output typically assigned to the econo- mizer solenoid, but can be changed by the operator. The output is connected to terminal 21 and is the 1st LED on card 2.

Slide Valve Setpoint # 2 (Hot Gas Bypass):

Activates the output typically assigned to the hot gas bypass solenoid, but can be changed by the operator. The output is connected to terminal 22 and is the 2nd LED on card 2.

Alarm:

Activates the output during an alarm condition. This is a reverse acting output. The output is connected to terminal 23 and is the 3rd LED on card 2.

Liquid Injection # 1:

Activates the output assigned to the liquid injection solenoid. The output is connected on terminal 25 and is the 5th LED on card 2.

Liquid Injection # 2:

Not currently enabled Remote Enabled:

Activates the output assigned to notify a central con- trol system of the Vission 20/20 run status. The out- put is connected to terminal 27 and is the 7th LED on card 2.

Shunt Trip:

Activates the output during a false start condition and the emergency stop timer has expired. This out- put could be wired the a breaker with a shunt trip that feeds power to a starter to force a shutdown. The output is connected to terminal 28 and is the 8th LED on card 2.

Condenser Step # 1:

Activates the output assigned to the 1st step of the condenser. The output is connected to terminal 41 and is the 1st LED on card 4.

Condenser Step # 2:

Activates the output assigned to the 2nd step of the condenser. The output is connected to terminal 42 and is the 2nd LED on card 4.

Condenser Step # 3:

Activates the output assigned to the 3rd step of the condenser. The output is connected to terminal 43 and is the 3rd LED on card 4.

Condenser Step # 4:

Activates the output assigned to the 4th step of the condenser. The output is connected to terminal 44 and is the 4th LED on card 4.

Analog Outputs

The Analog Output (AO) selections allow the operator to enter a desired value of the output then turn on the out- put. The operator will have to measure the output using meter capable of measuring a 4-20mA signal.

Compressor VFD:

Sets the analog output assigned to the compressor VFD. The output is connected to AO #1 on card 10.

Condenser VFD:

Sets the analog output assigned to the condenser VFD. The output is connected to AO #2 on card 10.

% Slide Valve Position

Sets the analog output assigned to the Slide Value position used to inform a central control system of the capacity position. The output is connected to AO #3 on card 10.

Liquid injection Motorized Valve:

Sets the analog output assigned to the liquid injec- tion motorized value position. The output is connect- ed to AO #4 on card 10.

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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 Installation Recommendations Proper Wiring SizingVoltage Source DC signals GroundingMixing 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 OutputsLoad Anticipating Oil ControlLiquid 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 PotentiometerVolume Slide Valve Potentiometer Slide Valve OperationSlide 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 Configuration UnitsTime & Date Communications TouchscreenAnti-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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