7 Troubleshooting and Maintenance
7-14
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
CX-ConfiguratorFDT Troubleshooting
CX-ConfiguratorFDT provides several means to troubleshoot either the CJ1W-PRM21 PROFIBUS
Master Unit, the slave devices or the network. The means all rely on features discussed in the previ-
ous section.
Troubleshooting the Master Unit
To troubleshoot the Master Unit or the network the Master DTM Diagnosis User Interface provides a
help in determining problems. The figure below shows the Monitor - Master Status tab of the Master
DTM Diagnosis User Interface.
The indicators shown in the (example) figure above are all related to bit flags in the Unit Status
Word, the Master Status Word 1, the Master Status Word 2, and the Slave Status Word (see section
4-2 Device Variables for CJ-series Unit (Software Switches, Statuses)).
The table below lists combinations of indicators with information on possible problems.
7-4-2 Troubleshooting the Network using CX-ConfiguratorFDT
Indicators Description/Correction
Local Parameter Storage Error
(Valid Configuration Indicator will be
OFF)
An error has occurred, when writing the configuration to the non-volatile mem-
ory.
To correct this:
• Restart the Unit.
• Re-download the configuration.
• If the problem persists, replace the PROFIBUS Master Unit.
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