Mitsubishi Electric MELSEC iQ-R Series User Manual page 45

■Number of logging data
With 'CH1 Number of logging data' (Un\G436), the number of valid data in 'CH1 Logging data' (Un\G10000 to Un\G10999)
can be checked.
• When the number of collected data points is less than 1000
Address 0
Valid data
Address 1
Address 2
CH1 Number of logging data = 5
Address 3
Address 4
Address 5
Invalid data
(Data stored in these areas are not reliable.)
Address 998
Address 999
• When the number of collected data points is 1001 or greater
Address 0
Address 1
Valid data
Address 2
Address 3
CH1 Number of logging data = 1000
Address 4
Address 5
Address 998
Address 999
The number of logging data increases by one each time new data is stored.
When CH1 Logging data (Un\G10000 to Un\G10999) becomes full (Number of logging data = 1000), the next data is stored in
the head address of CH1 Logging data (Un\G10000 to Un\G10999), and the logging operation continues overwriting the
existing data. In this case, the number of logging data is fixed to 1000.
1 FUNCTIONS
43
1.10 Logging Function
1