Mitsubishi Electric MELSEC iQ-R User Manual page 80

Checking data when a hold trigger has occurred
The storage location of the data of when a hold trigger has occurred can be checked with 'CH1 Trigger pointer' (Un\G442,
Un\G443).
The offset value counted from the start address is stored in 'CH1 Trigger pointer' (Un\G442, Un\G443).
Ex.
The value to be stored in 'CH1 Trigger pointer' (Un\G442, Un\G443) when the logging operation stops under the following
conditions
• 'CH1 Logging data points setting' (Un\G536): 10000 points
• 'CH1 Post-trigger logging points' (Un\G540, Un\G541): 6505 points
• The data location where a hold trigger has occurred: 3500th data
(1)
(2)
(1) Storage location of the latest data CH1 Latest pointer = 4
(2) Storage location of the oldest data CH1 Head pointer = 5
(3) CH1 Trigger pointer = 3500
■Checking the trigger generation time
The trigger generation time can be checked with 'CH1 Trigger generation time' (Un\G453 to Un\G457).
Ex.
For 'CH1 Trigger generation time' (Un\G453 to Un\G457)
b15
Un\G453
First two digits of the year
Un\G454
Un\G455
Un\G456
Un\G457 Millisecond (higher-order digits)
Item
First two digits of the year
Month
Hour
Second
Day of the week
Millisecond (upper)
Millisecond (lower)
1 FUNCTIONS
78
1.14 Normal Logging Function
Address 0
Address 1
Address 2
Address 3
Address 4
Address 5
Address 3499
A hold trigger is generated.
Address 3500
Address 3501
Address 9998
Address 9999
... b8 b7
Month
Hour
Second
Millisecond (lower-order digits)
Last two digits of the year
Day
Minute
... b0
Last two digits of the year
Day
Minute
Day of the week
Storage contents
Stored in BCD code.
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.