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1 FUNCTIONS
1.14 Error History Function
1.14 Error History Function
This function records errors and alarms that occurred in the A/D converter module to store them into the buffer memory area.
Up to 16 errors and alarms are stored.
Operation
When an error occurs, the error code and the error time are stored from Error history 1 (Un\G3600 to Un\G3609) in order.
When an alarm occurs, the alarm code and the alarm time are stored from Alarm history 1 (Un\G3760 to Un\G3769) in order.
• Detail of the error code assignment
• Detail of the alarm code assignment
Storing example of error history and alarm history
*1 Values stored when an error occurs at 12:34:56.789 on Saturday, January 31st, 2015.
The start address of Error history where the latest error is stored can be checked in 'Latest address of error history' (Un\G1).
The start address of Alarm history where the latest alarm is stored can be checked in 'Latest address of alarm history'
(Un\G3).
Item Storage contents Storage example
*1
First two digits of the year/Last two digits
of the year
Stored in BCD code. 2015H
Month/Day 131H
Hour/Minute 1234H
Second 56H
Day of the week One of the following values is stored in BCD code.
Sunday: 0, Monday: 1, Tuesday: 2, Wednesday: 3
Thursday: 4, Friday: 5, Saturday: 6
6H
Millisecond (upper) Stored in BCD code. 7H
Millisecond (lower) 89H
b15 b8 b7 b0
…
Error code
First two digits of the year Last two digits of the year
Month Day
Hour Minute
Second Day of the week
Millisecond (higher-order digits) Millisecond (lower-order digits)
Un\G3600
Un\G3604
Un\G3603
Un\G3602
Un\G3601
Un\G3605
Un\G3606
Un\G3609
to
to
System area
b15 b8 b7 b0
…
Alarm code
First two digits of the year Last two digits of the year
Month Day
Hour Minute
Second Day of the week
Millisecond (higher-order digits) Millisecond (lower-order digits)
Un\G3760
Un\G3764
Un\G3763
Un\G3762
Un\G3761
Un\G3765
Un\G3766
Un\G3769
to
to
System area
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