Novus myPCLab User manual

NOVUS AUTOMATION 1/9
my
PCLab
INSTRUCTION MANUAL – V1.1x B
INTRODUCTION
myPCLab is a very compact Data Acquisition tool that connects to a PC via a USB port and monitors two universal input
analog variables along with one digital input. From hobbyists to scientists, from simple technical tasks to complex
engineering activities, myPCLab can be an invaluable tool for on-line monitoring and data logging in school, laboratory
research, machine data recording and industrial understanding.
It comes with intuitive and easy-to-use Windows software which plots and records data, shows gauges, bargraphs and
digital readouts. The USB port is accessed as a virtual serial port, which makes myPCLab compatible with SCADA
software with Modbus RTU driver or with any program with ASCII serial communication.
Multiple units of myPCLab can be connected to the same computer, easily expanding the number of inputs. The
myPCLab software can simultaneously communicate with multiple modules.
This manual describes software installation and connection of input signals to a myPCLab module. Instructions on using
the software are available on its help system.
Not compatible with Windows® 10.
READ THIS RECOMMENDATION TO AVOID DAMAGE TO YOUR COMPUTER.
myPCLab inputs are not electrically isolated from the USB port. Before connecting signals from sensors or
transducers, make sure that they are not in contact with any source of electrical power (wires or conductive
surfaces which may get energized). Input channels are not isolated from each other.
SPECIFICATIONS
Analog Input Signals: Configurable for channels 1 and 2. The input signals and measuring ranges are listed in the
following table.
•Thermocouples: J, K, T, E, N, R, S and B types.
Input Impedance >> 1 MΩ
•Pt100: Three wires connection, 625 µA bias current, α = 0.00385.
•Linear Signals: 0 to 50 mVdc: Input Impedance >> 1 MΩ
0 to 10 Vdc: Input Impedance = 1 MΩ. Available only in channel 1.
4 to 20 mAdc: Input Impedance: 22 Ω (+ 2,0 Vdc)
Input Type Maximum Range
JThermocouple -130,0 to 940,0 °C (-202,0 to 1724,0 ºF)
KThermocouple -200,0 to 1370,0 °C (-328,0 to 2498,0 ºF)
TThermocouple -200,0 to 400,0 °C (-328,0 to 752,0 ºF)
EThermocouple -100,0 to 720,0 °C (-148,0 to 1328,0 ºF)
NThermocouple -200,0 to 1300,0 °C (-328,0 to 2372,0 ºF)
R
Thermocouple 0,0 to 1760,0 °C (-32,0 to 3200,0 ºF)
SThermocouple 0,0 to 1760,0 °C (-32,0 to 3200,0 ºF)
BThermocouple 500,0 to 1800,0 °C (932,0 to 3272,0 ºF)
Pt100 RTD -200,0 to 650,0 °C (-328,0 to 1202,0 ºF)
0 to 50 mVdc Adjustable from -32767 to +32767
0 to 10 Vdc (Channel 1) Adjustable from -32767 to +32767
4 to 20 mAdc Adjustable from -32767 to +32767
myPCLab module sensors and signals

my
PCLab
NOVUS AUTOMATION 2/9
Digital Input: Logic voltage or dry contact signals.
“0” Logic Level: contact closed or voltage lower than 0.5 Vdc.
“1” Logic Level: contact opened or voltage from 2.0 V to 5,0 Vdc.
Digital input special features: Digital input can be configured for counting, timing or frequency measuring (pulses per
time unit). Configurable: debounce time and scale factor.
Counting: It counts from 0 up to 4294967295. It is selectable to count on input rising edge, falling edge or
both. Maximum input frequency: 1 kHz (square wave, no debounce).
Timing: It times up to 4294967295 miliseconds (more than 49 days). It is selectable to run timing when
input in logic level "0" or when in "1". Accuracy: 0.5 % of the indicated time.
Frequency: It counts the number of pulses (rising edge, falling edge or both) in each base time,
configurable from 1 to 65535 seconds (18 hours). Maximum input frequency: 500 Hz (square wave, no
debounce). Maximum input frequency: 500 Hz (square wave, no debounce). Accuracy: 0.5 %.
Ambient Temperature Sensor: Internal thermistor.
Total Accuracy: Thermocouples R, S and B: 0.25% of the maximum range ± 3 °C (with maximum A/D resolution);
Other thermocouples: 0.25% of the maximum range ± 1 °C (with maximum A/D resolution);
Pt100, voltage and current: 0.20% of the maximum range (with maximum A/D resolution);
Ambient temperature channel: ± 1.5 °C (after 20 minutes connected to the USB port).
A/D Resolution: Configurable from 15 to 11 bits.
Input Sampling Rate: From 8 to 128 samples per second, depending on configured A/D resolution and number of
enabled channels.
Computer Interface: USB V1. 1 Plug and Play, virtual serial port interface.
USB connection: Mini-B receptacle.
Power supply: From the USB bus. Typical current 30 mA.
Operating environment: 0 to 50°C, 10 to 90% relative humidity, non-condensing.
Electromagnetic Compatibility: EN 50081-2, EN 50082-2.
Built-in cold junction compensation for thermocouples and wire resistance for Pt100.
ABS case, dimensions: 70 x 60 x 18 mm. See figure.

my
PCLab
NOVUS AUTOMATION 3/9
CONNECTIONS
This module operates only when connected to a PC USB bus, using the included type-A to mini-B cable. The following
figure shows all possible input connections.
Signal wires connected to all inputs should be kept separated from power wires, and when possible
installed inside of grounded electrical ducts.
Pt100 WIRING
Connections of channel 1 are on terminals 6, 7 and 8. For channel 2 on terminals 2, 3 and 4.
Connection with 3 wires from the sensor element to the module is necessary to cancel the
cable resistance error in the measurement. The 3 wires must have the same length and
gauge.
To connect a Pt100 with 2 wires, connect terminals 7 and 8 (channel 1) or 3 and 4 (channel
2).
THERMOCOUPLE WIRING
Connections of channel 1 are on terminals 6 and 7. For channel 2 on terminals 2 and 3.
Observe indicated polarity.
Cables for thermocouple connection must have the same thermo-electrical characteristics of
the thermocouple element (compensation or extension cable). Observe that both the
thermocouple and the compensation cable must be connected with correct polarity.
If compensation cable is not used or is
not connected with the correct polarity, large
measurement errors will arise.
4-20 mA WIRING
Connections of channel 1 are on terminals 6 and 7. For channel 2 on terminals 2 and 3.
Observe indicated polarity.

my
PCLab
NOVUS AUTOMATION 4/9
0-50 mV WIRING
Connections of channel 1 are on terminals 6 and 7. For channel 2 on terminals 2 and 3.
Observe indicated polarity.
0-10 V WIRING
Linear voltage signals from 0 to 10 V can only be connected to channel 1, terminals 5 and 6.
Observe indicated polarity.
DRY CONTACT DIGITAL INPUT WIRING
Digital signals are connected to channel 3, terminals 1 and 2.
The contact connected to digital input must not have any electrical voltage.
VOLTAGE DIGITAL INPUT WIRING
Digital signals are connected to channel 3, terminals 1 and 2. Observe indicated polarity.
Voltage levels applied to this channel must be within the specified limits. See “Specifications”.

my
PCLab
NOVUS AUTOMATION 5/9
USB DRIVER INSTALLATION
The following installation steps may be slightly different depending on your PC configuration and Windows version.
Follow the Wizard instructions and use the following steps and figures to select the correct installation options.
1. Insert the myPCLab CD in the CD-ROM drive.
2. Connect the module to a PC USB port. Windows® will detect the new hardware and after a few seconds the new
hardware wizard will start.
3. The Found New Hardware Wizard will show-up and ask if you want to connect to Windows Update to get the driver.
Select the “No, not this time” and select “Next”.
4. Select “Install from a list or specific location (advanced)” and select “Next”.
5. Select “Search for the best driver in these locations” and check option “Search removable media”. Select “Next”. If the
installation files are not in a CD, select option “Include this location in the search” and type the path for the required
files.
6. If a warning message regarding Windows® XP compatibility appears, select “Continue Anyway”.
7. The myPCLab driver files will be copied to your computer and, when concluded, a window will show up informing that
the wizard has finished installing the software. Select “Finish”.
8. It is possible that the previous steps repeat a second time for the completion of installation.
After driver installation, proceed to the next chapter to install the myPCLab software that provides configuration,
visualization, recording and data export.
In future connection of myPCLab modules, it is possible that Windows® prompt again for the USB driver installation. In
this case, the same wizard will be presented. Follow the above steps, but select option “Install the software automatically
(recommended)”, since the driver files are already installed.
The following figures are examples of Windows XP® New Hardware Wizard. For Windows 2000® they look different, but
the information is the same.

my
PCLab
NOVUS AUTOMATION 6/9
SOFTWARE INSTALLATION
The myPCLab software is a Windows program intended to:
•Configuration of myPCLab modules.
•
Plot and record data, show gauges, bargraphs and digital
readouts with data from multiple modules.
•Export acquired data in multiple file formats (xls, pdf, rtf, xml, html,
dbf, txt, csv).
To install, execute file myPCLabSetup.exe from the installation CD, and
follow the instructions to proceed with installation.
The myPCLab
software has a complete help system, with all the
necessary informati
on for its use. Start the software and press F1 or
select the Help menu to show the help content.
The myPCLab software can simultaneously communicate with multiple modules, making easy to expand the number of
inputs of a measurement system.
SERIAL PORT (COM PORT) ASSIGNMENT
A few seconds after connection of a myPCLab, Windows operating system assigns a COM port number for
communication. The assigned COM port number will not change in future connections to the same USB port. Users can
easily identify and modify the assigned COM port in:
Control Panel / System / Hardware / Device Manager / Ports (COM & LPT)
Select the desired “myPCLab” device, click with the right mouse button and select “Properties”. Select “Port Settings”
and click on the “Advanced...” button. In “COM Port Number” list, select the serial port to be assigned. Some serial port
can be marked as “in use”. Only select one of these ports if you are sure it is not being used by any other peripheral in
your computer.
In some cases, serial port can be marked as “in use” even when the associated device is not in the computer. In this
case, it is safe to assign this port to myPCLab.
The following figures ilustrate the most important steps for this procedure.

my
PCLab
NOVUS AUTOMATION 7/9
WARRANTY
Warranty conditions are available on our web site www.novusautomation.com/warranty.

my
PCLab
NOVUS AUTOMATION 8/9
APPENDIX 1 – SERIAL COMMUNICATION PROTOCOLS
Each myPCLab module installed in a PC is accessible as a distinct serial COM port. A module can communicate in one
of two protocols: ASCII (delimited text) or Modbus RTU. Any program with serial communication capability using one of
these protocols may be used to gather measurement data from the modules.
The used communication protocol depends on the “auto-send” module configuration. See the software help for
information on how the change the “auto-send” configuration.
•Auto-send disabled: Communicates using Modbus RTU protocol. The module is a slave that responds to read
requests issued by a Modbus master (for example a SCADA software).
•Auto-send enabled: Communicates using ASCII (delimited text) protocol. The module transmits continuously the
values measured in its channels, in text format.
The module can only be configured using the myPCLab software.
The serial COM port assigned to a device will only be available a few seconds after connection of the
myPCLab module to a USB port, since Windows operating systems needs to load the appropriate drivers.
To check the COM port assigned to each module, use the myPCLab software or go to the Windows
Control Panel in:
Control Panel/System/Hardware/Device Manager/Ports (COM & LPT)
MODBUS RTU (AUTO-SEND MODE DISABLED)
myPCLab is a Modbus RTU slave that can answer to “Read Holding Register” requisitions, Modbus command number
3. The module doesn’t have a specific Modbus address, since it’s the only device in its serial port. It will answer to read
request to any valid slave address.
When configuring the serial communication parameters of the Modbus master, set the COM port number assigned to the
device. The USB port ignores all other serial communication parameters.
•Communication Port: Select the COM port number assigned to the myPCLab.
•Baud rate: any
•Number of data bits: any
•Stop bits: any
•Parity: any
The following table shows the Modbus registers available for reading. Three different address formats are presented.
Use the address format according to your Modbus master.
Modbus Address (in 3 different formats)
Protocol, 0 based
Protocol, 1 based
PLC
Content
3
4
40004
Channel 3 (digital input) current state
4
5
40005
Channel 1 value
5
6
40006
Channel 2 value
6
7
40007
Ambient temperature value
62 63 40063
Counting/Timing/Frequency value (high
word)
63 64 40064
Counting/Timing/Frequency value (low
word)
Holding Registers Table (reference 4X)
•Channel 3 (digital input) current state
Value that represents the current state of the digital input. The values associated to levels ‘0’ and ‘1’ are defined
in the module configuration.
•Channel 1 and 2 values
Current value of the input channel, in engineering units. For values with decimal places, the decimal point
separator will be omitted. Example: A channel with value 13.96 will be read as 1396.
Measured values above or below its specified limits will be replaced by the corresponding overflow or underflow
values, according to the module configuration.
A disabled channel will return 0 (zero) as its measured value.
•Ambient Temperature Value
Current measurement from the internal ambient temperature sensor, in degrees Celsius or Fahrenheit, according
to module configuration. The decimal point separator is omitted. Example: 23.8°C is read as 238.
•Counting/Timing/Frequency value
Together, they have the current counting, timing or frequency value, depending on the configuration. When
directly read, this value is not multiplied by the scale factor.

my
PCLab
NOVUS AUTOMATION 9/9
Never send a Modbus write command to a module. Configuration or calibration registers may get corrupted
and the module may get unusable.
ASCII – DELIMITED TEXT (AUT0-SEND MODE ENABLED)
When configured to the auto-send mode, the myPCLab module transmits to its USB port a line of text containing the
current value of all measurement channels. A new line of text is transmitted after each measurement interval, according
to the module configuration.
Any software with serial communication capabilities can receive these data. When configuring the serial communication
parameters of the software, set the COM port number assigned to the device. The USB port ignores all other serial
communication parameters.
•Communication Port: Select the COM port number assigned to the myPCLab.
•Baud rate: any
•Number of data bits: any
•Stop bits: any
•Parity: any
The simplest way to receive and display data is using a simple communication terminal software, like Windows®
HyperTerminal. This software display on the screen all data received in the specified COM port. Other software like
Matlab, Simulink, HPVee, Testpoint, can also be configured to receive and parse measured data.
When operating in the auto-send mode, a myPCLab don’t expect to receive any information from the USB port. It
transmits data continuously, with no control from the receiver. If during a transmission the module receives a Modbus
RTU command, it will suspend the auto-send mode for 3 seconds and answer the Modbus request. After 3 seconds the
auto-send mode will resume.
The line of text sent after each measurement interval has the following format:
#AAA;BBB;CCC;DDD;EEE;FFF\r\n
Where:
•“#” is the start of line delimiter.
•“;” is the separator of measurement values.
•“AAA” is the value of channel 3 (digital input).
•“BBB” is the value of channel 1.
•“CCC” is the value of channel 2.
•“DDD” is the value of the ambient temperature.
•“EEE” is the current counting, timing or frequency value, depending on the configuration (not multiplied
by any scale factor).
•“FFF” is the time in milliseconds since the transmission of the first line.
•“\r\n” are ASCII values 13 (Carriage Return) and 10 (Line Feed), end of line delimiters (these
characters are not visible).
Measurements containing values with decimal separators will be transmitted with the character ‘.’ (ASCII 46). Examples:
#100;258.1;-5.7;24.6;16772
#0;4087;50.3;0;4900
#-10;-10.9;-5000;19.4;338105