EC312
CAN Lab #1 MicroMod Evaluation Board Intro
Spring 2015
Name: ______________________________________________
Use File > Save Project As to incrementally change the name of your .cox configuration file and save your
work throughout this exercise.
Reference: CANopen MicroMod quick guide.pdf
Part A Verify CAN USB Network Interface Hardware Configuration
1.
Verify the following CAN network components:
• USB/CAN Adapter plugged into your computer station
• Micromod CAN node connected to Adapter via CAN cable with built-in 120 Ω termination resistors
2. Locate but do not plug in “Wall wart” 6.4 to 12V power adapter with a center positive barrel connector.
3. Logon to your computer then go to Start > Control Panel, then select Hardware and Sound. Then
click “CAN Hardware (32-bit)”. Verify that the Active Device is set to “USB”.
4. Copy the CAN_Lab1 folder from our network drive “U:\Cyber2\EC312\CAN\Lab 1”.
5. Start CANopenMagic by double clicking “CANopen MicroMod Visual Display EC312 PCAN USB.cox”
6. Your display should look like the following. Explore the CANopenMagic configuration:
Visual Display of MicroMod CAN Data
CAN Message & Network Overview Window
Selection Tabs
CAN Trace & Network Description Window
Selection Tabs
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EC312 CAN Lab #1
7. Use the following procedure to connect CANopen Magic to the USB CAN adapter network:
a. Click the Connect icon:
b. Next in the Connect window, select “PEAKSystem Technik” from the “Driver” drop-down
menu.
c. Expand the “PCAN-USB” menu item and select:
“PCANUSB500 500 kBit/s”
d. Click “Connect” and note that the current CAN
network information is now displayed on the
bottom of the “CANopen Magic”
window.
e. The PEAK CAN USB adapter is
now configured and ready for use.
8. Verify that the “Trace” window is running.
9. Verify that a 6.4 to 12V positive center power supply is available.
Part B Experimenting with the MicroMod Evaluation Board CAN Node Inputs
1. Check to see if the “Trace” window is running. If not, start the “Trace” window by clicking the
run icon.
2. Connect the adapter power plug to the MicroMod Evaluation Board.
3. Verify that the Trace window shows a “Bootup” message and an “Emergency” message of “Error
reset or no error” message.
4. After verifying the step 3 messages, select the Network Overview tab on the upper window and click
on the “Scan Network” button in the upper left window.
Question #1: What is the Network Management (NMT) state of the MicroMod Node and what
happened in the Trace window?
5. In the “Network Overview” window click on
the Heartbeats “Set” button to start heartbeats
messages once every second.
6. Verify that the MicroMod node is now in
preoperational status with a blinking red LED
on the MicroMod module.
7. Use the “Network Management” tab in the
upper left hand margin of the CANopen
Magic window to set the network state to
“Operational”.
8. Verify that the MicroMod node is now in
operational status with the red LED on the
MicroMod module no longer blinking.
9. Note that CANopen uses Service Data Objects
(SDOs) for network management and Process
Data Objects (PDOs) for real-time process
data. This notation is evident in the “Msg
Type” field of the “Trace” window.
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CANopen Network State Diagram
EC312 CAN Lab #1
Question #2: What messages do your see in the Trace window?
10. Clear the “Trace” window toggling the run icon off and then back on.
11. Locate the four small white knobs on the voltage divider potentiometers connected to the first four
MicroMod analog inputs. Rotate the P0 through P3 voltage divider knobs and observe the “Trace”
and “Process Display” windows.
Question #3: What messages do you see in the Trace window? How does the Visual Display
Change?
12. On the MicroMod , locate the eight small white digital input switches contained in the red box shaped
Dual Inline Package (DIP) and the adjacent LED indicators. Switch the digital input signals on and
off and observed the “Trace” and “Process Display” windows.
Question #4: What messages do your see in the Trace window? How does the Visual Display
Change?
13. Note that the MicroMod has been programmed to transmit CAN messages whenever the analog or
digital inputs change.
Part C Experimenting with the MicroMod Evaluation Board CAN Node Outputs
14. Locate and select the “CAN Messages” tab in the upper left hand CANopen Magic window.
15. Note that the RPDO notation refers to “Receive Process Data Objects” when “received by the
MicroMod Module, these preprogrammed CAN messages will request changes to its digital and
PWM outputs.
16. Click on the “Tx” buttons associated with the three “RPDO1” CAN messages to transmit various bit
patterns to the seven digital outputs and note the changes to the MicroMod digital output indicator
LEDs as well as the “Trace” and “Process Display” windows.
Question #5: What messages do your see in the Trace window? How does the Visual Display
Change?
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EC312 CAN Lab #1
17. Connect an oscilloscope to the PWM output channel zero labeled “Fo0”. Also connect the scope
probe ground to a suitable MicroMod ground.
18. Click on the “Tx” buttons associated with the three “RPDO2 PWM Out xx% (Fo0 – 3)” CAN messages
to set the MicroMod PWM outputs to various 50% duty cycles.
19. Use the oscilloscope AutoSet button to capture the PWM output signal and experiment with the three
RPDO2 PWM commands.
20. Note the “Trace” traffic, changes to the “Process Display” window and the signal displayed on the
oscilloscope.
Question #6: What messages do your see in the Trace window? How does the Visual Display
Change?
Question #7: What did you observe on the Oscilloscope?
21. Use File > Save Project As to save final your .cox file with a unique file name.
Question #8: Discuss the lab procedure and results along with conclusions and problems.
What assistance did you need?
Answers to questions
Total score
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100
100
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EC312 CAN Lab #1