Mitsubishi Electric MELSEC iQ-R Series User Manual page 250

Symptom
Unable to output data to a data logging file
at the time of trigger logging. (The trigger
was not detected)
When performing trigger logging, the data
before the trigger is less than the number
of lines specified before the trigger.
When performing the trigger logging,
device values sampled in another
sequence scan as the one where a trigger
occurred is included in one data row.
The event was not detected.
4 TROUBLESHOOTING
248
4.3 Troubleshooting by Symptom
Check point
Is the condition satisfied for a longer time than the data
sampling interval when condition is specified in the
trigger condition setting?
Is the 'high speed sampling failure' (X1A) ON?
Is the 'trigger reoccurrence' (X1C) ON?
Is the 'processing overload occurrence' (X1B) ON?
Has the high speed data logger module's time been
changed by the time synchronization function?
Check the power supply status. (Has a momentary
power failure occurred?)
Is the trigger occurring before sampling the number of
lines of data before the trigger after powering ON or
after updating the settings?
Is the trigger continuously occurring?
Is the number of device points less than the access
units?
Is general sampling being used?
Is the time of the satisfied condition longer than the
data sampling interval when a data condition is
specified?
Is the 'high speed sampling failure' (X1A) ON?
Is the 'processing overload occurrence' (X1B) ON?
Check the power supply status. (Has a momentary
power failure occurred?)
Corrective action
• Adjust the system so the time that the creation trigger
condition is established is longer than the data
sampling interval.
• Decrease the number of the specified settings for
high speed sampling.
• Increase the data sampling interval of high speed
sampling.
• Set a constant scan to the CPU module. (Page
344 Processing Time)
• Adjust the system so that triggers do not occur
continuously. (Page 344 Processing Time)
• Adjust the system so that triggers do not occur
continuously.
• Correct the settings and lessen the processing load.
(Page 344 Processing Time)
• Reduce the timing of the time synchronization. (Do
not synchronize the time while the system is in
operation.) (Page 132 Time synchronization
setting)
• Correct the power supply status.
• Adjust the system so the trigger occurs after
sampling the number of lines of data after the trigger.
• Adjust the system so that the trigger occurs after the
number of lines after the trigger for the previous
trigger and the number of lines before the trigger for
the next trigger are both sampled.
• Set the number of device points sampled at one time
to less than the access units. (MELSEC iQ-R
High Speed Data Logger Module User's Manual
(Startup))
• Use high speed sampling.
Data logging function: (Page 25 Sampling function)
• Adjust the system so that the time the event
condition is satisfied is longer than the sampling
interval.
• Decrease the number of the specified settings for
high speed sampling.
• Increase the data sampling interval of high speed
sampling.
• Set a constant scan to the CPU module. (Page
344 Processing Time)
• Correct the settings and lessen the processing load.
(Page 344 Processing Time)
• Correct the power supply status.