Mitsubishi Electric MELSEC iQ-R Series User Manual page 135

CH1 Trigger pointer
Of CH1 Logging data (Un\G10000 to Un\G10999), the buffer memory address where the data at the time of a hold trigger
event is stored can be checked.
The difference between the buffer memory address where the data at the time of a hold trigger event and the start address in
CH1 Logging data (Un\G10000 to Un\G10999) is stored.
For details on the logging function, refer to the following.
Page 40 Logging Function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Trigger pointer
CH Trigger pointer (in Q compatible mode)
When 'CH1 Logging hold request' (Un\G471) is turned on and off, 'CH1 Trigger pointer' (Un\G437) is cleared
to 0.
CH1 Current logging read pointer
Each time an amount equivalent to the logging read points monitor value is logged, a value calculated by the following formula
is stored.
CH1 Current logging read pointer = CH1 Latest pointer - CH1 Logging read points monitor value + 1
For details on the logging function, refer to the following.
Page 40 Logging Function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Current logging read pointer
CH Current logging read pointer (in Q
compatible mode)
CH1 Previous logging read pointer
At the time of generating an interrupt to the CPU module, the current logging read pointer just before the update by the
interrupt is stored.
For details on the logging function, refer to the following.
Page 40 Logging Function
■Buffer memory address
The following shows the buffer memory address of this area.
Buffer memory name
CH Previous logging read pointer
CH Previous logging read pointer (in Q
compatible mode)
CH1 CH2 CH3
437 637 837
1114 1115 1116
CH1 CH2 CH3
438 638 838
1216 1217 1218
CH1 CH2 CH3
439 639 839
1224 1225 1226
CH4 CH5 CH6
1037 1237 1437
1117 1118 1119
CH4 CH5 CH6
1038 1238 1438
1219 1220 1221
CH4 CH5 CH6
1039 1239 1439
1227 1228 1229
Appendix 3 Buffer Memory Areas
CH7 CH8
1637 1837
1120 1121
A
CH7 CH8
1638 1838
1222 1223
CH7 CH8
1639 1839
1230 1231
APPX
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