Mitsubishi MELSEC-Q Series User Manual page 393

9
UTILITY OPERATION
Error history monitoring
Module information
Item
Number of error occurrences
Loop switching
Transient transmission
errors
Retry
Line trouble
UNDER
CRC
OVER
SHORT
Communication
FRAME
error
ABORT
TIMEOUT Displays the number of timeout errors occurred.
Exceeded
2KB
DPLL
ERROR
Table9.65 Explanation of Error history monitoring screen (Continued)
Other station monitoring
Displays the number of error occurrences.
Refer to the following for details of each error factor and
corrective actions.
( This section (3))
Displays the number of times loop switching or loopback has
been executed.
The symbol, "-" appears in the case of a coaxial bus system.
Displays the number of transient transmission errors occurred.
Displays the number of retries (retransmission due to a
communication error).
Displays the number of line errors occurred.
The symbol, "-" appears in the case of a coaxial bus system.
Displays the number of UNDER errors occurred.
Displays the number of CRC errors occurred.
Displays the number of OVER error occurred.
Displays the number of short frame errors (data message too
short) occurred.
Displays the number of AB. IF errors occurred.
Displays the number of more-than-2k-byte data reception
error occurred.
Displays the number of DPLL errors (data not properly
recognized due to synchronization/modulation) occurred.
Description
9.4 MELSECNET/H Utility
9.4.3 Operating Error history monitoring screen
Correspon- Correspon-
ding SB ding SW
SW00CE
SW00EE
SW00C8,
SW00C9
SW00CC,
SW00CD
SW00B8,
SW00C0
SW00B9,
SW00C1
SW00BA,
SW00C2
SW00BB,
SW00C3
SW00BC,
SW00C4
SW00BD,
SW00C5
SW00BE,
SW00C6
SW00BF,
SW00C7
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