Mitsubishi Electric NZ2EX2B-60AD4 User Manual page 224

(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).
Item
Error code
Order of generation
First two digits of the year/Last
two digits of the year
*2
Month/Date
*2
Hour/Minute
Second/00H (Fixed)
CH1 Digital operation value
CH2 Digital operation value
CH3 Digital operation value
CH4 Digital operation value
*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.
222
to
b15
0A00H
0A01H
First two digits of year
0A02H
Month
0A03H
Hour
0A04H
Second
0A05H
0A06H
0A07H
0A08H
0A09H
0A0AH
to
0A0FH
The error code of the error that occurred is stored.
The order of error occurrence is stored. (A value in the range of 0 to 65535 is
stored.)
*2
The items on the left are stored in BCD code.
*2
The value in CH Digital operation value (RWr2 to RWr5, RWr12 to RWr15) at
the time of occurrence of an error is stored.
b8 b7
Error code
Number of chronological order
Last two digits of year
00H (fixed)
CH1 Digital operation value
CH2 Digital operation value
CH3 Digital operation value
CH4 Digital operation value
System area
Storage contents
to b0
Day
Minute

0001H
2014H
1101H
1330H
5000H

*1
Storage example