Mitsubishi Electric MELSEC-Q Series - Transient Transmission Error Log

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CHAPTER 3 SPECIFICATIONS
3
3.3 Buffer Memory 3.3.2 Transient transmission error log
3.3.2 Transient transmission error log
Details of Transient transmission error log are shown below.
(1) Transient transmission error count (Un\G2592)
The cumulative number of errors saved in the error log blocks is stored.
(2) Error log pointer (Un\G2593)
Error log block No. of the latest error log is stored.
• 0: No error (No error log data)
• 1 or more: Error log block No. of the latest error log
The 17th and subsequent errors will be registered to the error log from Error log block 1 again.
(3) Error log blocks 1 to 16 (Un\G2594 to 2753)
Transient transmission error logs are stored.
Error log blocks 1 to 16 are composed of data in the same arrangement.
(a) Error code
An error code is stored. ( Page 511, Section 10.2)
(b) Target station network No./Target station No.
Network No. and station No. of an error-detected station are stored.
(c) Own station's network No./Own station's station No.
Network No. and station No. of the own station are stored.
(d) Time of error occurrence
Time of transient transmission error is stored as a BCD code.
When the pointer value is "16", the latest error log is registered to Error log block 16.
Ex.
+6 Month (01H to 12H)
+7 Hour (00
H to 23H)
+8 Second (00
H to 59H)
+9
Year (00H to 99H), first 2 digits
Year (00
H to 99H), last 2 digits
Day (01H to 31H)
Minute (00
H to 59H)
Day of week (0
H to 6H)
*1
+2 Target station network No.
+0 Error code
+1 System area (use prohibited)
+3 Target station No.
+4 Own station's network No.
+5 Own station's station No.
Un\G2594 to 2603
b15 b8 b7 b0to to
Un\G2744 to 2753
Un\G2604 to 2613
Error log block 1
Error log block 2
Error log block 16
*1 0
H: Sunday to 6H: Saturday
Time of error
occurrence