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6
MELSECNET/H UTILITY
Error history monitoring
Module information
Item
Number of error occurrences
Loop switching
Transient transmission errors
Retry
Line trouble
UNDER
CRC
OVER
SHORTFRAME
Communication
error
ABORT
TIMEOUT
Exceeded 2KB
DPLL ERROR
6
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6.3 Error History Monitoring Tab
Table 6.7 Description of the Error history monitoring tab
Other station monitoring
Description
Displays the number of error occurrences.
For details of factors and corrective actions, refer to the
following.
Page 6-13, Section 6.3 (4)
Displays the number of times that loop switching and loopback
has been executed.
"-" is displayed in the case of a coaxial bus system.
Displays the number of transient transmission errors that has
been occurred.
Displays the number of retries (for transmission errors).
"-" is displayed in the case of a coaxial bus system.
Displays the number of UNDER errors that has been occurred.
Displays the number of CRC errors that has been occurred.
Displays the number of OVER errors that has been occurred.
Displays the number of short frame (too short data message)
errors that has been occurred.
Displays the number of AB.IF errors that has been occurred.
Displays the number of timeout errors that has been occurred.
Displays the number of errors exceeding 2K bytes that has
been occurred.
Displays the number of DPLL (data not properly recognized in
synchronization/modulation) errors.
Corresponding
Corresponding
SB
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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