Omron SYSMAC CJ1W-PRM21, Operation Manual

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Overview
Section 7-1
7-1 Overview
The PROFIBUS-DP Master Unit and the Configuration software package pro-
vides 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 stations, allocated to the PROFIBUS-DP Master unit.
Troubleshooting on the
Master Unit For troubleshooting purposes, the following error indicators can be used:
• LED indicators on the front of the Unit
Three red error LED indicators and four status LED indicators show Unit
and network status and errors.
• CIO Words
Unit Status (CIO Word n + 4) containing status and error flags of the Unit,
and Master Status 2 (CIO Word n+6) 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.
• FINS command provide defined response codes, which can indicate spe-
cific errors.
Note n = CIO 1500 + (25 x unit number).
This section provides a number of procedures for troubleshooting, based on
the error indicators listed above.
Troubleshooting the
Configuration Software The Configuration software, i.e. CX-Profibus, the PROFIBUS-DP Master DTM
and the Generic Slave DTM provide several mechanisms for error detection
and correction:
• Errors occurring in CX-Profibus are displayed in pop-up message win-
dows and/or the error log window. The contents of the error log window
can be copied to the clipboard to allow analysis afterwards.
• CX-Profibus provides a FDT communication log window, which can be
copied to the clipboard. Analysis of this communication may provide addi-
tional information in case errors occur.
Troubleshooting the
network The PROFIBUS-DP 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-DP
Master unit and remote slave stations.
• Indications of errors in the remote slave stations, allocated to the PROFI-
BUS-DP Master unit.
The CX-Profibus and DTM capabilities for troubleshooting are extensively dis-
cussed in
SECTION 6 Operation .