Error History Function - Mitsubishi Electric MELSEC iQ-R Series User Manual

1.10

Error History Function

This function stores up to the latest 16 errors and alarms that have occurred on the pulse input module. The errors and alarms
are stored as a history in the buffer memory area.
Operation
When an error occurs, the error code and the error time are stored from Error history 1 (Un\G800 to Un\G809) in order. When
an alarm occurs, the alarm code and the alarm time are stored from Alarm history 1 (Un\G960 to Un\G969) in order. Error time
and alarm time are stored as follows.
Ex.
The following shows Error history 1 and Alarm history 1.
• Details of the error history
b15
Un\G800
Un\G801
Un\G802 First two digits of the year
Un\G803
Un\G804
Un\G805
Un\G806 Millisecond (upper)
Un\G807
Un\G809
• Details of the alarm history
b15
Un\G960
Un\G961
Un\G962 First two digits of the year
Un\G963
Un\G964
Un\G965
Un\G966 Millisecond (upper)
Un\G967
Un\G969
Item
Error channel or alarm channel
Error code or alarm code
First two digits of the year
Month
Hour
Second
Day of the week
Millisecond (higher-order digits)
Millisecond (lower-order digits)
System area
*1 Values stored when an overflow error (error code: 1900H) occurs on CH1 at 12:34:56.789 on Wednesday, October 31st, 2018.
1 FUNCTIONS
36
1.10 Error History Function
... b8 b7
Error channel
Error code
Month
Hour
Second
System area
... b8 b7
Alarm channel
Alarm code
Month
Hour
Second
System area
Storage contents
Stores the number of the channel on which the error or alarm occurred.
Stores the error code or alarm code.
Last two digits of the year Stored in BCD code.
Day
Minute
One of the following values is stored in BCD code.
Sunday: 0, Monday: 1, Tuesday: 2, Wednesday: 3,
Thursday: 4, Friday: 5, Saturday: 6
Stored in BCD code.

... b0
Last two digits of the year
Day
Minute
Day of the week
Millisecond (lower)
... b0
Last two digits of the year
Day
Minute
Day of the week
Millisecond (lower)
*1
Storage example
1H
1900H
2018H
1031H
1234H
56H
3H
7H
89H
