Conair MPA, MPW manual Activating SPI Communication, Connect the host machine to the chiller

Page 32

ACTIVATING SPI COMMUNICATION

NOTE: To disable SPI, use the setpoint ▲ or ▼ arrow to select Address. Press the ▼ arrow until OFF is displayed in the setpoint window.

See the APPENDIX for additional SPI programming information.

MicroKool portable chillers provide SPI compatible support for RS-485 serial communications with a host machine. You can use SPI communication to change or monitor the:

●Process temperature setpoint

●High and low temperature deviation alarms

●Process status (run and alarm conditions)

●Machine 1 status

●Machine 2 status

●Actual temperature to process

●Actual temperature from process

To use the SPI communication option, you must connect the chiller to the host machine and set the communication baud rate and node address using the setpoint select and adjustment buttons on the control panel.

1 Connect the host machine to the chiller.

Plug the male DB9 connector into the serial communica- tions port on the chiller.

2 Apply power to the chiller.

3 Enter the passcode, if necessary.

Hold the Setpoint Select button for 5 seconds. When the control displays 1 PaS, use the setpoint adjustment but- tons to enter the passcode.

4 Enter the node address.

Press the Setpoint Select button to choose Address. Then press the setpoint ▲ or ▼ arrow until the address you want appears in the setpoint display. The address may be set to any number from 32 to 254 (a hexadeci- mal integer between 20 and FE), as long as that number has not been assigned to another machine connected to the same network.

5 Set the baud rate to 12, 24, 48 or 96. The chiller must be set to send and receive data at the same baud rate as the host machine. Press the setpoint ▲ or ▼ arrow until the baud rate you want appears in the setpoint display window.

12 = 1200 bps	48 = 4800 bps
24 = 2400 bps	96 = 9600 bps

The green SPI status light on the control panel should flash when the unit is communicating. The LED will turn red, indi- cating an alarm, if SPI communication is not properly set up.

3-16

INSTALLATION

microKool Portable Chillers

UGH004/0999

Image 32

Contents Page Date Manual Number UGH004/0999 Serial numbers Model numbers Table of Contents IntroductionTroubleshooting Introduction Your Responsibility AS a User Purpose User GuideHOW Guide is Organized Read this SO no ONE Gets Hurt Page Description Typical Applications What is the MicrokoolCHILLER? HOW IT Works Water Cooled HOW IT Works AIR Cooled Features High Efficiency CompressorsSpecifications MPW Water Cooled Psi PressureSpecifications MPA AIR Cooled MPA-5Freezing Points of Aqueous Ethylene Glycol Solutions Freeze Protection RequirementsInstallation MicroKool Portable Chillers come fully assembled UnpackingBoxes Install plumbing for process and cooling lines Preparing for InstallationMake sure the installation area provides Connecting Process Water Supply Lines Install pipe to the rear of the chillerRemove the shipping pipe plug from the female Coat the pipe threads with thread sealantConnecting Main Power Supply Open the unit’s electrical enclosureTesting the Installation Apply power to the unitTurn on the condenser water supply MPW Units and check for leaks. If any leaks appear, stopEntering Setpoint Deviation Parameters Initial Setup Dip switch ConfigurationChanging Temperature Units Open the electrical enclosure Change Dip Switch 1 toDisconnect and lock out main power to the unit Open the electrical enclosure Set dip switch 3 to onSelect a new passcode using Setpoint adjustment buttonsFollow Steps 1 through 5 Press the RUN button to save the passcodeOpen the electrical Selecting Temperature Control Point Select a new control point using the Display buttonSet dip switch 5 to Press the RUN button to save the control pointInstalling Auto Start Feature Insert the two power leads from the deviceTo disable Auto Start Set dip switch 4 to the on positionWhen Auto Start is enabled Apply power to the chiller Enter the passcode, if necessary Activating SPI CommunicationConnect the host machine to the chiller Enter the node addressOperation PC-1 Control Features Setpoint displayPC-2 Control Features Pumpdown On/OffPositioning Control Panel To raise and swivel the control panelTo lower the control panel To detach the PC-2 control panelEntering a Passcode Press Setpoint to select the parameter you want to changeStarting the Chiller Enter the passcodeUsing Pumpdown Feature Stopping the ChillerTo shut down the unit Press Stop Press Button to turn on PumpdownPerforming AN Auto Tune Insufficient setpoint/process deviation Page Maintenance Preventative Maintenance Schedule Inspect power cords, wires and electrical connections Quarterly every 3 monthsCleaning Evaporators Cleaning CondensersTo fill the reservoir Refilling the TankLocate the fill port at Back of the chiller Checking Refrigerant Charge If the charge is low, recharge the systemSet dip switches 3 Performing System TestsPress To shut down the chiller Then open the electrical enclosureKEY/DISPLAY Test Input Test Connect all inputs to the systemPress any key to display the first test menus Select the Input Test menuSelect the Output Test menu Output TestConnect all outputs to the system Save changes and exit the output menu Select the OM Enable/Disable menuDisabling or Enabling Output Monitors Calibrating Temperature Sensors Release the Setpoint keyExit Calibration Mode Press the up key to begin calibratingWait until the control displays don or bad Press SelectExit the Operating Hours Log Logging Operating HoursIndex through test menus to the operating log Troubleshooting Before Beginning FEW WordsVerify that you have manuals for other equip Messages shown on the control panel. TheseHOW to Identify Cause of a ProblemSupplied to the pump Motor?Is the required water flow Greater than the pump’sIs the thermocouple Loose?Ply wire leads become Level Switch fuse Has the indicated deviceHas one of the main sup Disconnected?Compressor Shut Down Alarms Refrigerant pressure is either too low or too highAll models Air-cooled unitsIs the freezestat setting Installed correctly?Freeze Stat Input is open Is there sufficient fluid Flow through he evaporaIs something wrong with Cable?System Alarms Chiller Will not Power UP Checking Replacing Fuses If fuses continue to failOn the front panel counterclockwise to open Replace the fuse. The fuses are located on the motherLocate the pump overload module attached Resetting OverloadsCheck the overload Replacing the Motherboard Remove and discard the old contactor Reverse this procedure to install the new conReplacing Compressor Contactor Checking Unloader Valve Replacing the Freezestat WE’RE Here to Help From outside the United States, callAppendix A-2 SPI Commands Supported by Conair Microkool SPI Command PairsSPI Status Words Status, ProcessStatus, Machine Appendix B-4 PARTS/DIAGRAMS PD-2 PD-3 PD-4 PD-5