Chapter 5
64
The graphical user interface
5.8 Diagnostics view
Once you have completed your project and connected to your MELSEC-WS safety
controller, you can perform a diagnostics on your system. In the Diagnostics view, a
complete history of all messages, information, warnings and error messages of a
connected MELSEC-WS safety controller is available in the upper part of the window.
If you click on one of the entries in the list, details on the selected message are
displayed in the lower part of the window.
Keyword Description
Code Hexadecimal error code
Description Error description
Time stamp Total CPU module operation time at the time of error (days:hours:min:sec)
Local time Time when error occurred (PC system time).
This value is not displayed for historical errors.
Cycle power Total number of times the CPU module has been switched on
Type Error type (e.g. information, warning, recoverable error, critical error)
Source Module that detected the error
Category Part of the module that detected the error
Information Internal information about the error
Occurrence
counter
Number of times this error has occurred.
If an error occurs several times in a row, only the last occurrence will be
recorded and the occurrence counter is increased.
Power on hour Total time since the last power-on of the CPU module. This value is reset at
every restart.
Operating hours Total power-on time of the CPU module
Block Diagnostics memory area in the CPU module.
8 = RAM (volatile, error occurred within the current power-on cycle)
88 = EEPROM (non-volatile, error occured in a previous power-on cycle)
Register Index in the diagnostics memory area
CPU channel Internal hardware channel (A or B) of the module that detected the error
For a list of the most important error codes, possible causes and potential rectification
measures please see the Safety Controller User's Manual.
Figure 34:
Diagnostics view
Table 8:
Meaning of the diagnostics
information
Note
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