YASKAWA CIMR-E7 series Technical Manual

Diagnostics 3-3IntroductionThe following is a short guide to troubleshooting the LONW ORKS Option installation. It highlights some of the most common issues faced whendiagnosing and correcting issues associated with the startup and operation of a drive with a industrial network. While most of the information iscentered on the application of the drive, the guidelines presented are applicable to most LONWORKS networks.Diagnosis of network fault issues typically fall into three categories: installation, wiring and cabling, and network configuration. Installation andwiring will be discussed below to help resolve common problems associated in L ONWORKS network troubleshooting. Refer to thedocumentation that accompanied the controller for information on system setup.Troubleshooting Check List1: The drive operates correctly without the LONW ORKS Option installed. This includes running the drive from the operatorkeypad. Check that the drive responds to commands and faults as the application requires.2: Check that the LONW ORKS Option is correctly installed on the drive. That all connectors are firmly seated and that the optioncard hold down is on top of the LONW ORKS Option, not underneath it.3: Check that the communications cable plug end has been firmly seated in connector J1 on the LONW ORKS Option, andthat the cable has been properly connected to the driveís terminal assembly.4: Check that the termination switch on the driveís terminal assembly is in the ON position.5: Check that the communications cable is not routed near any high voltage or current wires.6: Check that the L ONWORKS network cable has been correctly and securely connected to the LONW ORKS Option.7: Check that the drive communications, command and control parameters are set correctly.8: Check that the LONW ORKS Option has established communication with the drive and that neither the ìCALLî message nor anyfault message is displayed on the drive operator.9: Check that the LONW ORKS Option is connected to a noise free ground. Verify the state of the ground connection with anoscilloscope. Make sure that the correct equipment is used and that it does not induce noise into the network. A Z-Lead probeattachment for the oscilloscope is recommended. Also, when using line powered equipment, differential probes must be used inorder to avoid introducing imbalances onto the network. If a noise free ground cannot be found, leave the LONW ORKSOption ground connection unconnected.10: If a safety interlock is used with the drive, verify that the safety interlock is wired properly and that the controllingmulti-function input parameter is programmed correctly.11: Verify that the LEDs on the LONW ORKS Option are in their correct state.11: Check that all other devices on the network are connected properly.12: Check that the network is correctly terminated for the topology used.13: Check that the node has been correctly configured. Refer to the documentation that was supplied with theL ONWORKS controller for information on node commissioning and configuration. The External Interface File (E7_LW.XIF) andthe Device Resource Files (E7_LW.TYP, E7_LW.ENU, E7_LW.FPT, and E7_LW.FMT) may be found on the CD supplied withthe drive or downloaded from www.drives.com.