Mitsubishi MELSEC iQ-F, Руководство пользователя

Страница: 145 / 182

APPX
Appendix 4 Buffer Memory Areas
143
A
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 at 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.
Ex.
When the value of CH2 Latest pointer (Un\G635) is 20549
• '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.
When 'CH1 Logging hold request' (Un\G471) is turned on → off, 'CH1 Number of logging data' (Un\G436) is
cleared to 0.
Buffer memory name CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
CH

Latest pointer 435 635 835 1035 1235 1435 1635 1835
CH  Latest pointer (in FX2N allocation mode function) 9041 9042 9043 9044 9045 9046 9047 9048
Buffer memory name CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
CH  Number of logging data 436 636 836 1036 1236 1436 1636 1836
CH  Number of logging data (in FX2N allocation mode
function)
9051 9052 9053 9054 9055 9056 9057 9058
20549 = 20000 + 549
CH2 Logging data
Latest pointer: 549
(offset value from Un\G20000)
Un\G20000
Un\G20549
Un\G20550
Un\G29999
The oldest data
The latest data