Mitsubishi Electric MELSEC iQ-R User Manual page 209

CH1 Number of logging data
High speed Low speed
The number of logging data points stored in Logging data area of each channel can be checked during the logging.
■Updating the number of logging data
The process of update varies depending on the logging function in use.
Logging function in use
Normal logging function
Continuous logging function
High speed continuous logging function
For details on each logging function, refer to the following.
Page 71 Normal Logging Function
Page 95 Continuous Logging Function
Page 111 High Speed Continuous Logging Function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Number of logging data
CH1 Trigger pointer
Low speed
This buffer memory area enables users to check which buffer memory address of Logging data area (Un\G10000 to
Un\G99999) stores the data at the hold trigger generation.
Trigger pointer stores the difference between the address storing the data at the hold trigger generation and the start address
of Logging data area (Un\G10000 to Un\G99999).
For details on the normal logging function, refer to the following.
Page 71 Normal Logging Function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Trigger pointer
When 'CH1 Logging hold request' (Y1) is turned off, 'CH1 Trigger pointer' (Un\G442, Un\G443) is cleared to 0.
Simultaneous
Synchronization
conversion
Updating the number of logging data
• The value in 'CH1 Number of logging data' (Un\G440, Un\G441) increases by one every time data is stored
after the start of the logging. When the number of logging data points reaches the value set in 'CH1 Logging
data points setting' (Un\G536)  100, the logging data area is overwritten with new data from the start address.
Thus, the value in 'CH1 Number of logging data' (Un\G440, Un\G441) is fixed to the value of 'CH1 Logging
data points setting' (Un\G536)  100.
• When 'CH1 Logging hold request' (Y1) is turned off, 'CH1 Number of logging data' (Un\G440, Un\G441) is
cleared to 0.
• When continuous logging is started, Number of logging data increases by 5000 every time logging data of
5000 points is stored. When the data count reaches to 720000000, Number of logging data returns to 0 and
then increases by 5000 again.
• When 'Continuous logging start/stop request' (Un\G100) is changed from Stop (0) to Start (1), 'CH1 Number of
logging data' (Un\G440, Un\G441) is cleared to 0.
• When high speed continuous logging is started, Number of logging data increases by 10000 every time
logging data of 10000 points is stored. When the data count reaches to 3600000000, Number of logging data
returns to 0 and then increases by 10000 again.
• When 'CH1 High speed continuous logging start/stop request' (Un\G478) is changed from Stop (0) to Start (1),
'CH1 Number of logging data' (Un\G440, Un\G441) is cleared to 0.
CH1
440, 441
CH1
442, 443
CH2 CH3
640, 641 840, 841
CH2 CH3
642, 643 842, 843
Appendix 3 Buffer Memory Areas
A
CH4
1040, 1041
CH4
1042, 1043
APPX
207