Mitsubishi Electric MELSEC iQ-F FX5 User Manual page 148

CH1 Latest pointer
The buffer memory address of the latest data in CH1 Logging data (Un\G10000 to Un\G19999) can be checked with this
buffer memory area.
The offset value counted from the start address of CH1 Logging data (Un\G10000 to Un\G19999) is stored.
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Latest pointer
CH Latest pointer (in FX3 allocation mode
function)
Ex.
When the value of CH2 Latest pointer (Un\G635) is 8549
Latest pointer: 8549
(Offset value from Un\G20000)
■Default value
The default value is 0 for all channels.
• 'CH1 Latest pointer' (Un\G435) increases one by one each time data is stored from beginning of the logging.
• When 'CH1 Logging hold request' (Un\G471) is turned onoff, 'CH1 Latest pointer' (Un\G435) is cleared to
0.
CH1 Logging data points
The number of data stored in the logging data storage area can be checked during the logging.
'CH1 Number of logging data' (Un\G436) increases one by one each time data is stored from beginning of the logging.
When the value in the logging data storage area reaches 10000, 'CH1 Number of logging data points' (Un\G436) is fixed to
10000 since the value is overwritten from the head again.
For details on the logging function, refer to the following.
Page 59 Logging function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Number of logging data
CH Number of logging data (in FX3 allocation
mode function)
When 'CH1 Logging hold request' (Un\G471) is turned onoff, 'CH1 Number of logging data' (Un\G436) is
cleared to 0.
APPX
146
Appendix 4 Buffer Memory Areas
CH1
435
9041
CH2 Logging data
Un\G20000
The latest data
Un\G28549
28549 = 20000 + 8549
Un\G28550
The oldest data
Un\G29999
CH1
436
9051
CH2 CH3
635 835
9042 9043
CH2 CH3
636 836
9052 9053
CH4
1035
9044
CH4
1036
9054