1 / 8

On the preparation for the CANbus commissioning

On the preparation for the CANbus commissioning . Outline CANbus cabling What to do. What we need. ADC-I CANbus communications What to do What we need. Status. CANbus cabling: What to do. Check Continuity CAN data lines Measure impedance: 60   OK

bernad
Download Presentation

On the preparation for the CANbus commissioning

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. On the preparation for the CANbus commissioning Outline CANbus cabling What to do. What we need. ADC-I CANbus communications What to do What we need. Status

  2. CANbus cabling: What to do. • Check Continuity • CAN data lines • Measure impedance: • 60  OK • 120  Cable broken in one place • High Z  Cable broken in at least two places • CAN power lines and Shield • Short lines: check continuity using a digital multimeter • Long lines: Put known voltage in one side of the cable and measure the voltage in the other side. • Check that the shield is connected to earth in both sides of the cable

  3. CANbus cabling: What we need • Power Supply: Adjustable from 15 to 20V. Output current limit around 2A. • Digital multimeter, Amperimeter, and a box with tools. • 1 board that allows to connect the Power Supply to the CANbus Power lines. • 1 board to have access to all the lines of the CANbus cable, using an Oscilloscope and a Digital multimeter.

  4. Board to connect the Power supply to the CANbus • Input Connector: DB9 female • Output Connector: DB9 male • Power Connector: 2 pins to conect the Power supply cables

  5. Board to have access to all the CANbus lines

  6. ADC-I CANbus communications: What to do. • Once we have checked the cabling: • Try to communicate with each one of the 16 ADCs that there are in one CAN branch. If someone fails: • Check the input voltages of the drawer, to see if the drawer is powered properly. • Observe the traffic of the CANbus data line with an Oscilloscope, to see if the ADC is replying and to check the signal integrity. • Run the QC program, using a laptop with a PCMCIA-CAN2 card. • If QC fails  The ADC-I must be replaced.

  7. ADC-I CANbus communications: What we need. • The same that we need to check the cabling: • Power supply, Digital multimeter, Amperimeter, tools. • 1 board to connect the power supply to the CANbus. • 1 board to have access to all the lines of the CANbus • 1 oscilloscope • Laptop with National instruments PCMCIA-CAN2 card • VME crate with 1 ROB • Cable Belden 9844 for dual CAN lines.

  8. Status of the Components • Power Supply. • We can use a power supply from IFAE or try to get a power supply from CERN. • Oscilloscope: There is one at CERN. • Cable Belden 9844 for dual CAN lines. • We can get this cable at CERN. • VME crate. • We can use a VME crate from IFAE or try to get one at CERN. • All the rest of the things that we need are ready.

More Related