Mitsubishi Electric NZ2EX2B-60AD4 - Page 224

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(23)Error history data
Up to 15 errors occurred in the module are recorded.
The following table and figure show the storage contents for Error history 1 (address: 0A00H to 0A0F).
*1 This example assumes that a second error has occurred at 13:30:50 on November 1, 2014.
*2 The clock information of the error that occurred is based on the clock information acquired from the CPU module of the
master station.
When an error has occurred before the clock information is acquired from the CPU module, the error time is not
recorded.
Error history 2 to Error history 15 (address: 0A10H to 0AEFH) are stored in the same format as that of Error
history 1 (address: 0A00H to 0A0FH).
For the error code, refer to the following:
• Error Code List ( Page 172, Section 11.2)
(a) Storage order of the error history
The latest error is stored in Error history 1 (address: 0A00H to 0A0FH).
Errors that occurred in the past are stored in Error history 2 to Error history 15 (address: 0A10H to 0AEFH) in
reverse chronological order.
If 16 or more errors occur, errors are deleted from the oldest.
Item Storage contents
Storage example
*1
Error code The error code of the error that occurred is stored. 
Order of generation
The order of error occurrence is stored. (A value in the range of 0 to 65535 is
stored.)
0001H
First two digits of the year/Last
two digits of the year
*2
The items on the left are stored in BCD code.
2014H
Month/Date
*2
1101H
Hour/Minute
*2
1330H
Second/00H (Fixed)
*2
5000H
CH1 Digital operation value
The value in CH Digital operation value (RWr2 to RWr5, RWr12 to RWr15) at
the time of occurrence of an error is stored.

CH2 Digital operation value
CH3 Digital operation value
CH4 Digital operation value
b15
to
b8 b7 b0
to
Error code
First two digits of year
Last two digits of year
Month
Day
Hour Minute
Second
System area
Number of chronological order
00H (fixed)
0A00H
0A01H
0A02H
0A03H
0A04H
0A05H
0A06H
0A07H
0A08H
0A09H
0A0AH
0A0FH
to
CH1 Digital operation value
CH3 Digital operation value
CH4 Digital operation value
CH2 Digital operation value