4-17
4 Data Exchange with the CPU Unit
CJ-series PROFIBUS Master Unit Operation Manual for NJ-series CPU Unit (W509)
4-2 Device Variables for CJ-series Unit (Software Switches, Statuses)
4
4-2-4 Master Status (*_MstrSta)
One of the following Device Variables for CJ-series Unit is used to monitor the Master Status from the
user program:
• WORD-type Device Variable for CJ-series Unit holding all switch functions contained in Master Sta-
tus.
• BOOL-type Device Variable for CJ-series Unit separating functions per each switch contained in
Master Status.
The Master Status word collects all status information related to the PROFIBUS Master function. Any
errors related to the PROFIBUS Master function are collected in the Master Errors (*_MstrErrSta) vari-
able.
*_ParamLoadErr BOOL R Local parame-
ter load error
TRUE:
Indicates an error occurred during an attempt to
transfer the Configuration and setup data from
non-volatile to volatile memory.
FALSE:
Indicates a successful load attempt is made.
*_FileRdErr BOOL R File read error TRUE:
Indicates an error occurred during an attempt to
transfer the Configuration and setup data from a
memory card in the CPU to the Unit’s non-volatile
memory. The error can be caused by an error in
the File or an error during transfer.
FALSE:
Indicates a successful load from a memory card is
made.
• Limited memory card functionality based on
CPU version. Check specification details for
more information.
*_LogStorErr BOOL R Error log stor-
age error
TRUE:
Indicates an error occurred during an attempt to
write the Error log to internal non-volatile memory.
If the error occurred, the Error log data in the non-
volatile memory may be corrupted. Upon a restart
the Unit will attempt to repair the Error log.
FALSE:
Indicates that the Error log has been transferred to
the non-volatile memory successfully.
4-2-4 Master Status (*_MstrSta)
Name of Device Variable for CJ-
series Unit
Type R/W Description Function
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