Mitsubishi Electric MELSEC iQ-R User Manual page 116

■Counting the number of logging data points
The value of 'CH1 Number of logging data' (Un\G440, Un\G441) increases by 10000 every time data of 10000 points has
been logged.
After the number of data points reaches 3600000000, the counter is reset to 0 and counting starts again.
Ex.
When the value of 'CH1 Number of logging data' (Un\G440, Un\G441) is 3599990000, the value changes from 3599990000
 3600000000  10000  every time logging of 10000 points is completed.
To calculate the elapsed time of high speed continuous logging, refer to the values of 'CH1 Logging cycle
monitor value (s)' (Un\G452) and 'CH1 Number of logging data' (Un\G440, Un\G441).
• Elapsed time (s) = Logging cycle monitor value (s)  Number of logging data
When 'CH1 Logging cycle monitor value (s)' (Un\G452) is 1 and 'CH1 Number of logging data' (Un\G440,
Un\G441) is 3600000000 (maximum value), logging for 3600 seconds (1 hour) has been completed.
Stopping high speed continuous logging
Changing 'CH1 High speed continuous logging start/stop request' (Un\G478) from Start (1) to Stop (0) stops high speed
continuous logging. After high speed continuous logging is stopped, the data that was partially logged is stored in buffer
memory areas and the value of 'CH1 Number of logging data' (Un\G440, Un\G441) is updated to the number of points of when
the stop request was accepted. In addition, 0 is stored in the data area and later of when the stop request was accepted.
Ex.
When a stop request is accepted at the timing of when 3000th data is logged under the condition in which 100000 is already
stored in 'CH1 Number of logging data' (Un\G440, Un\G441), 103000 is stored in 'CH1 Number of logging data' (Un\G440,
Un\G441). Subsequently, 0 is stored in the 3001th to 10000th logging data areas.
(1)
(1) A stop request is accepted.
■Restarting high speed continuous logging
To restart high speed continuous logging, change the value of 'CH1 High speed continuous logging start/stop request'
(Un\G478) from Stop (0) to Start (1). High speed continuous logging is restarted from the beginning of the logging data
storage areas. In this case, the values in the following buffer memory areas are initialized to 0.
• 'CH1 Number of logging data' (Un\G440, Un\G441)
• 'CH1 High speed continuous logging data A side storage flag' (Un\G476)
• 'CH1 High speed continuous logging data B side storage flag' (Un\G477)
After high speed continuous logging is restarted, values are stored in the logging data storage areas (starting from A side).
The values before the restart of high speed continuous logging remain in CH1 Logging data area (Un\G10000 to Un\G29999).
Thus, before referring to the logging data, check that Logging data storage in A side completed (1) has been stored in 'CH1
High speed continuous logging data A side storage flag' (Un\G476) again.
The value of 'CH1 Trigger generation time' (Un\G453 to Un\G457) is updated to the time when high speed
continuous logging was restarted.
1 FUNCTIONS
114
1.16 High Speed Continuous Logging Function
1st data
2nd data
3rd data
·
10000 points
3000th data
0
·
0