Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 387

8 TROUBLESHOOTING
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[Status of self station]
• Parameter setting
• Reserved station setting
• Transmission mode
• Duplex transmission setting
• Duplex transmission status
[Network information]
Error history monitor
• Network type
• Module No.
• Network No.
• Group No.
• Station No.
[Loop switching] Number of occurrences
[Transient transmission] Number of occurrences
[Forward loop]
• Retry
• Line trouble
• Communication errors (UNDER, CRC, OVER, etc.)
[Reverse loop]
• Retry
• Line trouble
• Communication errors (UNDER, CRC, OVER, etc.)
Error history details
Clear error history
Network test
..............................Section 7.8
.......................................Section 4.8.1
Loop test
..............................Section 4.8.2
Setup confirmation test
..............................Section 4.8.3
Station order check test
.................................Section 4.8.4
Communication test
[Network information]
• Network type
• Module No.
• Network No.
• Group No.
• Station No.
[Loop switching]
Station number, cause, status after switch
[Transient transmission errors]
Error code, error type
[Clear type]
Clearing number of retries, etc,
MELSEC-Q
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