CJ1W-PRM21 Operation Manual

7 Troubleshooting and Maintenance

7-1 Overview

The CJ1W-PRM21 PROFIBUS Master Unit and CX-ConfiguratorFDT provide extensive means for troubleshooting which can be used to quickly determine errors in the Unit, in the configuration, in the network, and/or in remote slave devices allocated to the Unit.

 Troubleshooting on the Master Unit

For troubleshooting purposes, the following error indicators can be used:

• Indicators on the front of the Unit

• Three red error indicators and four status indicators show Unit and network status and errors.

• Device Variables: Unit Status (*_UnitSta) containing status and error flags of the Unit and

Master Errors (*_MstrErrSta) containing error information about the PROFIBUS network and the PROFIBUS functions of the Unit.

• The Error Log collects error codes for various error events. Serious errors are stored in nonvolatile memory and can be retrieved even after a Unit power down.

• Event Logs in the CPU

This section provides a number of procedures for troubleshooting based on the error indicating methods listed above.

 Troubleshooting the Configuration Software

The Configuration software, i.e. CX-ConfiguratorFDT, the PROFIBUS Master DTM and the Generic

Slave DTM provide several mechanisms for error detection and correction:

• Errors occurring in CX-ConfiguratorFDT are displayed in pop-up message windows and/or the error log window. The contents of the error log window can be copied to the clipboard to allow analysis afterwards.

• CX-ConfiguratorFDT provides a FDT communication log window which can be copied to the clipboard. Analysis of this communication may provide additional information in case errors occur.