DNet Troubleshooting Guide v. Get the full title to continue reading from where you left off, or restart the preview. Futuretech: Troubleshooting industrial network communications. An industrial end user usually decides to implement a networked automation solution because of the promise of increased efficiency and productivity. An open system offers the added benefits of interoperability and interconnectivity. This manual is described for the following person. 7.3 Resistance Temperature Detective Input Moduel. 9.4 DeviceNet Module. DeviceNet Detective User Guides : Gu. Piconet DeviceNet Coupling Module manual: SDNL-0404D-xxxx user guide and manual. The ultimate motivation is the desire to generate greater profits. However, the ease of implementation and ongoing maintenance does not always meet the expectations of the user. Problems arise when the system arrives on site; the maintenance staff has a tacit expectation that the network will work, and if it does not, then it is the responsibility of someone else. Network failures result in downtime, and generally the system integrator and manufacturer representative will not be on site to fix the problem. The cost of training maintenance staff is a small investment to avoid large lost profits that result from downtime. The following advice points to problems that can be encountered by the maintenance team and provides basic solutions. The ODVA (Open Device. Net Vendors Association) estimates 9. Device. Net errors are caused by wiring and noise problem. It is imperative for a successful manufacturer to quickly and efficiently troubleshoot a control process and return the line to production. Many times when a problem develops within a system, the majority of downtime is related to finding problems. The actual repair of components or system software is the last step in the troubleshooting process and usually takes the least amount of time. A good troubleshooting process minimizes the time to repair or correct the problem and return the system to its normal operating condition. In the vast majority of cases, device failure is the cause of the problem; in such cases, the user can rapidly correct the situation. Occasionally, the cabling, controller, or software may be the root cause. In these cases, an easy, reliable troubleshooting procedure will save a significant amount of time and effort in restoring the system. This, in turn, will save money. If the system fails with no indication of the source of the problem, there are some easy, time- saving troubleshooting methods for quickly identifying the failed unit. NetMeter for testing DeviceNet manufactured by Molex, part number DN-MTR. DeviceNet Planning and Installation Manual - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Futuretech: Troubleshooting industrial network communications An industrial. Typically, the decision to install a DeviceNet system is made by a senior member of the engineering department, and not by the maintenance staff.
Description of Revision Date of Revision Manual Number. 4.17 Resistance Temperature Detective Input Module. 4.22 DeviceNet Master Module. Start with the power side and verify that everything is energized, including devices with alternate power supplies. The Device. Net Network should operate between 1. VDC. Disconnect nodes from the system and see if the network energizes. By removing a node that has the failure on it, the system will re- energize. Use the halving rule to quickly isolate the problem area. First split the network and see which side energizes then continue to halve the failed side until you isolate the failed component. When installing new devices, change the MAC- ID number (most devices are manufactured with the MAC- ID preset to 6. Duplicate MAC- ID numbers will generate an error. Some device IDs are set in software while others use rotary or dip switches. Many times these switches or software get changed accidentally and can cause errors to occur. If the problem is isolated to an individual device, read that device’s instruction leaflet or product manual for specific solutions for that item. Occasionally, interfaces may be damaged and may need to be replaced. Be careful to set a new device to reflect the settings in the old unit. Verify that the system is intact and that no damage has occurred. Walk the network if possible to determine its actual layout. This will help you visualize where trouble may lie and may reveal obvious problems. If greater than 6. When the bus is active, CAN. Ensure that these devices are properly connected. Check the most obvious points first (three- phase motors, power supplies and cables, elevator shafts, etc.). Ideally, the voltage drops for each section should be within 1. If the readings vary more than 4. VDC, then message errors may occur. This can be done by moving the power supply in the direction of the overloaded section, moving nodes from the overloaded section, shortening the network length, moving high current loads closer to the power supply, adding a power supply, or breaking the network into two sections. For advanced troubleshooting of noise on the network, an oscilloscope can be used to capture waveforms and spikes. These can be used for node commissioning and network message traffic analysis. An open system offers the added benefit of interoperability and interconnectivity. The ultimate motivation is the desire to generate greater profits. The gap between expectation and reality is usually related to a lack of knowledge and understanding of the system and its capabilities. This is where training becomes crucial in ensuring the maximum return on the investment for this new system. In the case of a contracted third party, it is essential that the end user clearly define the responsibilities, both pre- and post- design, of the system integrator. Otherwise, there is significant risk that the user will assume the role of integrator and troubleshooter for the inevitable issues during installation and commissioning. Attention to detail at the design stage results in a smooth installation and start- up. It is quite common to encounter difficulty in integrating products from different manufacturers; the simple solution is to insist on conformance- tested products and qualified (experienced and trained) design people. A third option is to include installation and commissioning of major assemblies, such as motor control centres, as a separate item on the bill of material from the manufacturer. Whatever the choice, the user must make sure that the individuals responsible for the installation are properly trained on network design rules such as proper grounding practices, power supply installation, physical media installation and network termination. As well, manufacturers and integrators will provide system maintenance training customized for the specific system installed at a location. Surprisingly, many users are unwilling to buy some insurance in the form of training for their personnel. This relatively small cost is a key element in the successful implementation of this new technological purchase. MRO. Donald Bildfell, CET (donaldbbildfell@ eaton. Andrew Carrothers, P. Eng, MBA (andrewgcarrothers@eaton. Both are with Eaton/Cutler- Hammer Canada, Burlington, Ont. Product information can be found at www.
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