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7 Troubleshooting and Maintenance
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
7-4 Troubleshooting the Network
7
7-4-2 Troubleshooting the Network using CX-
ConfiguratorFDT
The indicators in the upper half of the Slave Status tab shown in the figure above indicates the sta-
tus of the slave devices by using different colors (see sections 5-7-1 Monitoring the Master Unit and
the Network, 5-7-2 Monitoring Slave Status).
In case an indicator is either Red or Orange, additional information can be obtained from the PROFI-
BUS Master Unit by using the mouse pointer to click on the colored indicator. The basic diagnostics
information for the selected slave device is retrieved from the Master Unit and displayed in the lower
half of the Slave Status tab. The table below lists the indicators which are of interest for trouble-
shooting.
Indicator Description/Correction
Station non-existent The slave device does not respond to any of the request messages sent by the Master Unit.
• Make sure that the slave device is powered correctly.
• Check the wiring and make sure that the slave device and the Master Unit are connected.
Station not ready The slave is communicating, but not ready for data transfer.
• Check the slave device and make sure that it is working properly.
• Check any loose modules, in case the slave device is a modular device.
• Consult the operation manual of the slave device. Check if additional action must be taken to
initiate I/O data exchange (e.g. reset the device after a malfunction).
Configuration fault The I/O configuration sent by the Master Unit is rejected by the slave device. The Parameter
request used indicator will also be ON.
• Check the selected I/O modules in the Slave DTM. Make sure they match the expected total
I/O number and sequence.
• Consult the operation manual of the slave device. Check if additional modules must be
selected (e.g. empty i/O modules for power modules in a modular slave).
Extended diagnostics
received
The slave device has returned extended diagnostics information. This does not necessarily
indicate a malfunction. The Master DTM does not display the extended diagnostics returned by
a slave device. Open the associated Slave DTM to check on the contents of the extended diag-
nostis.
Function not supported The Master Unit has sent a message to the slave device which is not supported by that device.
Invalid slave response This bit is set by the Master Unit if the slave has returned an invalid response to a master
request message.
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