Mitsubishi FX3U-4AD User Manual page 249

FX /FX /FX PLC User's Manual - Analog Control Edition
3G 3U 3UC
FX -4DA (4-channel Analog Output)
3U
2. Cautions regarding table output errors
• Errors in data table
When the data table in the PLC contains an error, the error can be detected during transfer of the data to
the buffer memory in FX
written as the error source (BFM #91).
If an error is caused in the data table by directly rewriting the data in BFM after the data table is transferred,
the error can be detected when the table is output using incorrect data. In this case, the error code (BFM
#90) is K1 2, and the BFM number is written as the error source (BFM #91).
• Error during transfer of the data table
While transferring of the data table, an error (error codes K31 to K33) does not occur even when the BFM
#80 (table output function start/stop) is set to a value out of the setting range. An error occurs after the
completion of the transfer of the data table.
• Error during output of the table
Even if the output value is scaled over during output of the table, the output of the table will not be stopped.
However, while the output value is scaled over, b10 (scale over) of the error status BFM #29 stays on.
When an error (error codes K122 to K172, K31 to K33) occurs during output of the table, the output of the
table is cancelled and the analog output value just before the occurrence of the error is retained.
• Table output errors (BFM #90) and table output error source numbers (BFM #91) are not retained. They
will be cleared when the next data table transfer command is given or the table output start function is
executed.
-4DA. In this case, the error code (BFM #90) is K1 1, and the device number is
3U
6 Table Output Function
6.5 Details of table output error
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