Mitsubishi Electric MELSEC-Q series User Manual page 134

(44)CH Latest pointer (Un\G1098 to Un\G1105)
The buffer memory address where the latest data is stored can be checked in CH Logging data (Un\G5000 to
Un\G44999) for each channel. The difference between the buffer memory address where the latest data is stored
and the start address in CH Logging data (Un\G5000 to Un\G44999) is stored.
For details on the logging function, refer to the following.
Logging Function (
When the value of CH2 Latest pointer (Un\G1099) is 3550
Ex.
● CH Latest pointer (Un\G1098 to Un\G1105) moves one by one each time data is stored from when the logging starts.
● When CH Logging hold request (Un\G1008 to Un\G1015) is turned OFF (0), CH Latest pointer (Un\G1098 to
Un\G1105) is cleared.
(45)CH Number of logging data (Un\G1106 to Un\G1113)
The number of data stored in the logging data storage area can be checked for each channel during the logging.
For details on the logging function, refer to the following.
Logging Function (
● The number of logging data is added one by one each time data is stored from when the logging starts.
● When the 5000 data is stored in the logging data storage area, the value is overwritten from the head again. Therefore,
CH Number of logging data (Un\G1106 to Un\G1113) is fixed to 5000.
● When CH Logging hold request (Un\G1008 to Un\G1015) is turned OFF (0), CH Number of logging data (Un\G1106
to Un\G1113) is cleared.
132
Page 58, Section 4.12)
CH2 Logging data
Un\G10000
Un\G13550
Oldest data Un\G13551
Un\G14999
Page 58, Section 4.12)
Latest data
13550 = 10000 + 3550