Superheat Controller| Doc V2.1 |HVAC Software ... - Microstaq

Universal SuperHeat Sensor
Software Interface Guide Rev 2.2

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Universal SuperHeat Sensor |Software Interface Guide Rev 2.2
Contents
Introduction ............................................................................................................................. 1
Definitions ....................................................................................................................................... 1
Conventions .................................................................................................................................... 1
Features........................................................................................................................................... 1
Hardware and Software Requirements .......................................................................................... 1
Getting Started ......................................................................................................................... 1
USHS Interface Installation ............................................................................................................. 1
USHS Interface Setup ...................................................................................................................... 3
USB to RS485 Converter Box COM1 Communication Setup ........................................................... 3
RS485 Communication Interface Setup .......................................................................................... 4
Using USHS Interface ................................................................................................................ 5
Main Screen .................................................................................................................................... 5
Single USHS Setup ........................................................................................................................... 5
Multiple USHS Setup ....................................................................................................................... 7
Refrigerant Setting .......................................................................................................................... 8
Status ............................................................................................................................................... 8
Record Status Data .......................................................................................................................... 9
View Plot ......................................................................................................................................... 10
USHS Interface Alarms .............................................................................................................. 10

INTRODUCTION
This software guide is intended to instruct the user about
installing, configuring and operating DunAn Microstaq’s
Universal SuperHeat Sensor software interface.
The software version supported by this guide is:
� Universal SuperHeat Sensor Interface v1.4
DEFINITIONS
� USHS – Universal SuperHeat Sensor
CONVENTIONS
The following are the conventions used in this application guide:
� Note will be represented as:
� All warnings and cautions will be represented as:
FEATURES
The USHS Interface includes the following features:
� Pressure and temperature measurements
� Superheat calculation
� Data recording
� Plotting superheat graph
� Automatic detection of supply voltage
� Alarms detection
� Serial communication capability
� Multiple unit communication capability
Universal SuperHeat Sensor |Software Interface Guide Rev 2.2
HARDWARE AND SOFTWARE REQUIREMENTS
The following table provides the hardware and software requirements
for installing and using the USHS Interface.
Hardware Requirements System Requirements
� DunAn Microstaq USHS
� USHS Wiring Harness
� Isolated USB to RS485 Converter
� Laptop or Desktop PC
� Small Flat Tip Screwdriver
� Wire Stripper
GETTING STARTED
� Microsoft Windows
Vista, Windows XP, or
Windows 7 operating
system
This section provides instructions for installing, setting up, and using
the USHS Interface.
USHS INTERFACE INSTALLATION
This section provides instructions to delete previous versions and
install the latest version of the DunAn Microstaq USHS Interface.
Complete uninstallation steps only if a previous version
of the USHS Interface is installed. If not applicable,
proceed to installation instructions.
To delete the previous versions of the USHS Interface, complete the
following steps:
1. Navigate to the Control Panel
2. Click Programs -> Uninstall a program
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3. Select the USHS Interface vX.X (or more if multiple
versions are installed)
4. Click Uninstall/Change
5. The USHS Interface Removal Utility will now run,
prompting the user to confirm the removal of the
USHS Interface and all of its components. Click Yes.
6. The USHS Interface will now be removed.
The above icons apply to Windows 7. They may vary
slightly with various Windows operating systems.
To install the USHS Interface, complete the following steps:
1. Unzip the folder USHS vX.X Installation Package.
2. Open the folder and Double-click setup.exe.
3. The User Account Control window may appear. Click
Yes to allow installation to continue.
4. The USHS Interface vX.X Setup window appears. Click
OK.
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5. Click the Setup icon in the USHS Interface Setup window.
It is recommended to install the program in the
specified directory. To change the destination
directory, click the Change Directory button and
select a new file location.
Click Exit Setup to cancel the installation.
6. The USHS vX.X Interface – Choose Program Group window
appears.
7. In the Program Group field, it is named as ‘USHS Interface
vX.X’ and in the Existing Groups list, ‘USHS Interface vX.X’ is
selected automatically.
8. Click Continue.
The installation begins.
If there is a mismatch in the Microsoft Windows
software version, the Version Conflict window may
appear. The version conflict represents that there
are newer libraries on the PC compared to the
installation package. The recommended option is
to always keep the current system libraries. This
may occur for multiple cases depending on the
Operating System. Click Yes multiple times to keep
existing files, until the setup completion message
appears.
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9. Click Ok.
The USHS Interface has now been successfully
installed.
After the installation is complete, the default
shortcut to the application will be available at
Start>All Programs>USHS Interface vX.X.
USHS INTERFACE SETUP
The following diagram describes the USHS Hardware - USHS
Interface setup environment.
The Host PC and the USHS are connected through an isolated
USB to RS485 Converter box using the attached cables.
It is required that the RS485 use a built-in isolated
adapter.
See the USB to RS485 Converter Box COM1 Communication
Setup section for setting up a COM1 communication port for the
USB connection.
USB TO RS485 CONVERTER BOX COM1
COMMUNICATION SETUP
This section provides instructions to set up the USB to RS485
Converter Box COM1 Communication.
Universal SuperHeat Sensor |Software Interface Guide Rev 2.2
If this is the first time using the USB to RS485 Converter with your PC,
a set of drivers must be downloaded and installed.
The VSU-485G made by VirtualSCADA is one example of a compatible
USB to RS485 Converter. VirtualSCADA, like many manufacturers,
hosts its latest drivers on their website, found here:
http://www.virtualscada.com/PRODUCT_DRIVERS/UC232R-
10/CDM20808.zip
To install the drivers and set up the USB to RS485 Converter COM1
Communication, complete the following steps:
1. Extract the downloaded driver file and take note of the
location.
2. Plug in the USB to RS485 Converter to the PC.
3. When prompted for the device driver location, navigate to
the location of the newly extracted driver files.
The computer system will update the driver list and install
the USB converter automatically. A new virtual COM port
will now be available on the PC.
4. Follow these steps to check if the USB driver has been
installed successfully (may vary slightly with various
Windows operating systems):
a. Navigate to the Control Panel.
b. Double-click System.
The System Properties window appears.
c. Click the Hardware tab.
d. Click the Device Manager Button.
The Device Manager window appears.
e. Double-click Ports (COM & LPT).
The sub-list of ports is displayed.
f. Unplug the USB device.
If one of the communication port(s) disappears from
the Ports (COM & LPT) list, it indicates that the driver
has been installed successfully.
5. Plug in the USB device again and make a note of the COM
port on which the device is installed.
The DunAn Microstaq USHS Interface has an issue that
it requires the converter to be installed on COM 1. If the
device is already on COM1, skip to step 12.
6. In the Device Manager window, double-click Ports (COM &
LPT). The sub-list of devices is displayed.
If the device is not installed on COM1, right click the
device and select Properties.
7. In the USB Serial Port Properties window, click the Port
Settings tab. Ensure the Port Settings match those shown.
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8. Click the Advanced button.
The Advanced Settings window appears.
9. From the COM Port Number drop-down list, select
COM1.
10. Click OK.
11. Click OK in the Properties window.
The old COM port number may still be displayed
in the Device Manager, but this is simply a display
issue. Unplug and plug-in the device to the PC
again and the screen should refresh to show the
USB device now on COM1.
12. Make note of the physical USB port on which the
device is plugged in (on the PC).
Ensure that the same port is used whenever the
RS485 adapter is plugged into the computer.
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RS485 COMMUNICATION INTERFACE SETUP
To set up the RS485 Communication Interface for a single USHS,
complete the following steps:
13. Make sure the USHS is installed on the HVAC/R system
properly. See the USHS Hardware Installation Guide for
more details on SINGLE AND MULTIPLE USHS installation.
14. Apply power to the USHS by connecting the red and black
(18 AWG) wires to 12VDC, 24VDC or 24VAC power supply.
15. Locate the network cable and signal ground wire (green)
coming out of the USHS.
The network cable is a grey cable that has two wires
(red and black) inside.
16. Connect the three wires (red, black, and green) to the
converter as shown in the Communication Interface
diagram.
The red network wire should be connected to the D+ port,
the black network wire should be connected to the D- port,
and the green ground wire should be connected to the SG
port (signal ground).
17. Loosen the terminals on the converter using a flat-tip
screwdriver, and then insert each wire into the proper
terminal.
18. Tighten each terminal after inserting the wires.
19. Connect the USB cable from the converter into the USB port
of the PC, after all the wires are connected to the converter.
Use the same USB port that was used during the initial
setup.
Ensure that the two black switches on top of the
converter box are set to “R” and “485”.
Ensure no USHS wires come in contact with metal or
earth (ground).
Wrap all exposed wires with an electrical tape.
DunAn Microstaq recommends that the length of the wire between
the transformer and USHS should not be more than 20 feet for 18
AWG wires and up to 40 feet for 16 AWG wires.
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USING USHS INTERFACE
This section provides information on the features of the USHS
Interface and how to properly configure it.
MAIN SCREEN
The main screen is used to enter Single USHS Setup, Multiple
USHS Setup or Factory Diagnostics.
The Factory Diagnostics tab is for authorized personnel
only.
To view the USHS Interface main screen, complete the following
steps:
1. Select Start>All Programs>User Interface vX.X>
USHS_vX.X
The main screen appears.
SINGLE USHS SETUP
The Single USHS Setup feature is used to establish
communication with a single USHS.
To configure communication for a single USHS, complete the
following steps:
1. At the main screen, click Single USHS Setup.
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2. For a Single USHS Setup, the USHS Interface will
automatically detect the Manufacturer ID. Select Retrieve
Manufacturer ID
The Manufacturer ID is a 16-digit number which
should not be confused with the 10-digit serial
number labeled on the USHS.
3. After the Manufacturer ID has been retrieved, a
confirmation message box will appear. Click OK.
If no Manufacturer ID appears then check the RS485
adapter, USB, and power wiring connections.
4. After the Manufacturer ID has been retrieved, proceed to
the next step by selecting Assign Node ID.
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When Assign Node ID is selected with loose
wiring connections, the following message box
appears.
Click OK and check for loose wiring connections.
5. After the Node ID is assigned, a confirmation message
box will appear along with 001 in Node ID box. Click
OK.
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It is not mandatory to enter any information into the
Remarks fields. Users may wish to identify the
location of the USHS or include other pertinent
information to be collected along with system data.
6. Click Go to Main Screen.
7. Select the Node ID 001, by clicking the Select Node ID dropdown
list. This will establish communication and allows
access only Refrigerant Setting tab.
8. The Superheat Sensor Configured message appears. Click
OK.
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MULTIPLE USHS SETUP
The next section is only for Multiple USHS Setup.
For a single USHS, skip to the section titled
Refrigerant Setting to continue the configuration
process.
The Multiple USHS Setup feature is used to establish
communication with two or more USHS units.
To configure communication for multiple USHS, complete the
following steps:
1. At the main screen, click Multiple USHS Setup.
2. Enter the supplied Manufacturer ID for each USHS
manually. Each Manufacturer ID is unique and will be
supplied by DunAn Microstaq.
Step 1 is not an automatic process. The
Manufacturer IDs should be entered manually.
Step 2 is automated process.
3. Manually enter the Manufacturer ID for each USHS.
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4. Click Assign Node ID. Each USHS will now be assigned a
Node ID, and the Node ID Configuration Completed
message box will appear. Click OK.
If an incorrect Manufacturer ID is entered, a Node
ID will not be assigned to that particular USHS. Only
USHSs with valid and correct Manufacturer IDs will
be identified and assigned a Node ID.
5. Click Go to Main Screen.
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6. Select Node ID 001, by clicking the Select Node ID
drop-down list. This will establish communication and
will allow access to the Refrigerant Setting tab.
7. The Superheat Sensor Configured message appears.
Click OK.
REFRIGERANT SETTING
The refrigerant used in the system must now be selected for the
USHS Interface to begin reporting system information.
1. Select the appropriate refrigerant in drop-down list.
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STATUS
2. Click SET. The Superheat Sensor Set Successfully message
will appear to confirm that the USHS Interface is now ready
to begin reporting system information. Click OK.
3. For a Single USHS Setup, monitoring and recording system
information may now begin by accessing the Status tab.
4. For Multiple USHS Setup, each USHS that has been assigned
a Node ID will require a refrigerant to be selected in the
Refrigerant Setting tab before the Status tab may be
accessed for that USHS.
After the Refrigerant Setting is completed, the USHS Interface will
display the current status of the selected USHS.
Select the preferred units for display on the Status tab.
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The status of the following parameters is displayed:
Parameter Description
Supply Voltage The USHS auto detects the supply voltage
and is shown. The voltages that can be
detected are 12VDC, 24VDC and 24VAC.
Refrigerant The refrigerant selected in the setting tab
is also shown.
Measured Pressure
(Gauge)
Measured
Temperature
The measured pressure at the exit of the
evaporator where the USHS is located.
Measures external temperature at the
evaporator exit.
Calculated Superheat Real-time calculated superheat value
Alarm Lists any fault condition in the system (for
example: High Input Voltage). It will be
blank if there are no faults detected.
Unit Information The unit information is displayed at the
top of the screen. It consists of
Manufacturer ID, Unit Version and
Firmware version.
RECORD STATUS DATA
To begin logging system data from the USHS, complete the
following steps:
1. From the Status Refresh Frequency in Sec drop-down
list, select the required status refresh frequency. The
USHS displays and records data as selected refresh
frequency. The impact of this selection impacts three
things
i. Status screen refresh
ii. Frequency of the data recorded
iii. Frequency of the data points shown on the
run-time generated plot.
2. Click Record Status Data button to save the Status
details to a file.
3. Select a File path to select the location of the file
4. Enter the File name
5. Click Open to begin logging data.
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6. The logged data will be saved in text format. The data is
always recorded in US units only.
The units selected on the status screen do not
impact the data collection units.
The data file displays the USHS unit information, auto detected
voltage, refrigerant setting, run-time data, time and all the items on
the status screen at intervals based on the selected Status Refresh
Frequency.
Data recording will not occur while a message
box is open.
If the Refrigerant Setting tab is selected while
data is recording, a message box will appear
prompting the user to stop recording data.
Click OK. Then click the Recording Data button to stop recording data.
The Refrigerant Setting will now be accessible.
The Refrigerant Setting may now be changed. To resume recording
data, click Record Status Data.
A new file must be created for the newly selected
refrigerant. If an existing file is selected, the USHS
Interface will check the refrigerant setting in that file
to ensure that the selected refrigerant matches.
If the refrigerant settings do not match, a Check
Refrigerant message box will appear.
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VIEW PLOT
For a Multiple USHS setup, the data will be
recorded for only selected Node ID, i.e for the
selected USHS.
While data is recording, if any wiring connections
are unplugged or disconnected, therby losing
power to the USHS, the alarm message below
appears in the data collection.
The USHS also has the capability of generating a run-time plot of
calculated superheat. Follow below steps
1. Select View Plot on the status screen. The superheat
run-time curve is observed on the plot.
The selected Status Refresh Frequency in Sec
proportionally affects the chart generated in View
Plot:
1 second – 10 minutes elapsed time
3 seconds – 30 minutes elapsed time
5 seconds – 50 minutes elapsed time
It is recommended to select 1 second for the most
complete data collection.
2. The units of plot can be changed by selecting the units
on the status screen.
Universal SuperHeat Sensor |Software Interface Guide Rev 2.2
Plotting will not occur while a message box is
open.
Additionally, when the user clicks and stays on
refrigerant setting tab, the plotting will not
occur
USHS INTERFACE ALARMS
The USHS Interface is equipped to notify the user when certain alarms
are encountered by the sensor.
Please take note of the following alarm codes and the conditions that
trigger them:
1. Message not received completely – This occurs due to
either a loss of partial data or a compatibility issue between
the firmware and the USHS Interface.
2. Wrong checksum– This occurs due to data corruption over
the communication wire.
3. Communication timed out – This occurs due to loss of
communication between the USHS Interface and the
firmware.
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The following alarms pertain to the sensor operating range.
When any of these are encountered, please ensure the sensor is
being operated within the limits specified in the product
datasheet.
4. High Input Voltage – Triggered when the input voltage
exceeds the sensor operating range.
5. Low Input Voltage – Triggered when the input voltage
falls below the sensor operating range.
6. External Temp. not within Sensor Range – Triggered
when the external sensor temperature exceeds or falls
below the normal operating limits.
7. Internal Temp. not within Sensor Range – Triggered
when the internal sensor temperature exceeds or falls
below the normal operating limits.
8. Pressure not within Sensor Range– Triggered when
the input pressure exceeds the capability of the
external sensor.
Multiple alarm messages will appear in the Alarm
section when corresponding alarms are
encountered by the sensor.
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