Trigger Logging - Mitsubishi MELSEC Q series User Manual

6.3.2

Trigger logging

When trigger logging is selected, device values of the CPU module before and after a trigger (satisfaction of the
specified condition) are logged for the specified number of records. The flow of the trigger logging is shown below.
<Preparation for trigger logging>
Configure data logging settings in the
configuration tool, and write them to the
CPU module.
*3
<Start of trigger logging>
Start data logging by the start operation
from the configuration tool.
<Waiting for trigger>
Wait for the trigger condition
<Data sampling>
The data configured in the configuration tool
are collected and saved to an SD memory
card.
<Completion of trigger logging>
When data of the specified number of
records are collected and written to the SD
memory card, the trigger logging is
completed.
<Reading of trigger logging results>
Specify a file in the SD memory card, and
read out the data logging results.
:User operation
:Operation of CPU module
*1 Data logging can be resumed by performing the following from the pause status.
 Start operation from the configuration tool ( Page 147, Section 8.9)
 Turning on the special relay (Data logging start)
*2 Logging data are regarded as being saved until the entire buffer data are saved in the SD memory card.
For the data logging status, refer to  Page 63, Section 6.4.
*3
*4 For the configuration tool, refer to  Page 95, CHAPTER 8.
For the trigger condition, refer to  Page 59, Section 6.3.2 (1).
*5
*4
*5
*3
*4
*3
*4
CHAPTER 6 DATA LOGGING FUNCTION
*1
*2
<Pause of trigger logging>
By the following operation, data logging
pauses with the data logging settings
registered.
• Pause operation from the configuration tool
• Turning off the special relay (data logging
start
*3
<Stop of trigger logging>
By the following operation, registration of the
data logging setting in the CPU module is
cancelled.
• Stop operation from the configuration tool
*3
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