Overview - Omron CJ Series Operation Manual

7 Troubleshooting and Maintenance
7-1

Overview

The CJ1W-PRM21 PROFIBUS Master Unit and CX-ConfiguratorFDT provide extensive means for trou-
bleshooting which can be used to quickly determine errors in the Unit, in the configuration, in the net-
work, 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 non-
volatile 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.
 Troubleshooting the network
The PROFIBUS Master DTM and the Generic Slave DTM diagnostics information windows which
can display:
• Indications of errors in the PROFIBUS interface of the Unit
• Indications of errors in the communication between the PROFIBUS Master Unit and remote
slave devices.
• Indications of errors in the remote slave devices, allocated to the PROFIBUS Master Unit.
The CX-ConfiguratorFDT and DTM capabilities for troubleshooting are extensively discussed in sec-
tion 6.
7-2 CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)