Mitsubishi Electric MELSEC-Q series User Manual page 70

(9) Resuming the logging
To resume the logging, set OFF (0) to CH Logging hold request (Un\G1008 to Un\G1015). The logging resumes
from the head of the logging data storage area.
At this time, the head pointer, latest pointer, number of logging data, and trigger pointer are cleared, and OFF (0)
is stored in CH Logging hold flag (Un\G1016 to Un\G1023).
(a) Precautions
• It may take some time from when ON (1) is stored in CH Logging hold request (Un\G1008 to Un\G1015)
till when ON (1) is set to CH Logging hold flag (Un\G1016 to Un\G1023). To resume the logging, set OFF
(0) to CH Logging hold request (Un\G1008 to Un\G1015) after checking ON (1) is stored in CH
Logging hold flag (Un\G1016 to Un\G1023).
CH Logging hold request
(Un\G1008 to Un\G1015)
CH Logging hold flag
(Un\G1016 to Un\G1023)
Logging status
• When OFF (0) is set to CH Logging hold request (Un\G1008 to Un\G1015) before ON (1) is stored in
CH Logging hold flag (Un\G1016 to Un\G1023), the logging does not stop.
CH Logging hold request
(Un\G1008 to Un\G1015)
CH Logging hold flag
(Un\G1016 to Un\G1023)
Logging status
(b) Each buffer memory when logging resumes
When the logging resumes, the value in each buffer memory area is as below.
CH Head pointer (Un\G1090 to Un\G1097)
CH Latest pointer (Un\G1098 to Un\G1105)
CH Number of logging data (Un\G1106 to Un\G1113)
CH Trigger pointer (Un\G1114 to Un\G1121)
CH Logging data (Un\G5000 to Un\G44999)
*1 After the logging resumed, values are stored starting from the head area of the logging data storage area. The values
before the logging resumption are stored in CH Logging data (Un\G5000 to Un\G44999). To refer to the logging data,
check the valid data with CH Number of logging data (Un\G1106 to Un\G1113).
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OFF (0)
Logging
trigger execution
OFF (0)
Logging
Buffer memory
ON (1)
OFF (0) ON (1)
Logging after
Logging held
ON (1)
OFF (0)
Logging after
trigger execution
Values are initialized (Initial value: 0).
The values before the logging resumption are stored.
OFF (0)
OFF (0)
Logging
OFF (0)
Not held
Logging
Value status
*1