Mitsubishi Electric MELSEC iQ-R Series User Manual page 32

Logging device values at the rise of a trigger condition
The device values at the rise of a trigger condition are logged.
Device value
This function can be effectively utilized for outputting data in individual controls such as control data at the completion of a
process.
In addition, the changes of the device values between two subsequent trigger occurrences are monitored, and the result of
the device value changes can be output at the trigger occurrence.
Since the frequency of ON activations of the I/O signal or the time required for a single control processing can be output, this
function can be effectively utilized for detecting failures depending on the durability during the continuous operation, or
recording of the continuous operating time.
The device values, the number of times the counting condition has held true, and the time when the counting condition has
held true can be output.
With the following settings, the device values at the rise of a trigger condition can be logged.
• Unselect "Output lines before and after the trigger" with the [Logging type/File format] tab on the "Data
logging setting" screen.
■Device values
The device values sampled from the CPU module is output to a file.
■Number of times the counting condition has held true
The count conditions are monitored for each sampling interval, and the count value is increased by adding 1 whenever the
specified count condition is satisfied.
When the trigger logging condition is satisfied, the added count value is output. When the trigger logging condition is satisfied,
the count value will be cleared to 0.
Count condition
(Data comparison)
Trigger condition
(Data comparison)
Count value
Output value
1 FUNCTION
30
1.1 Data Logging Function
Output the value Output the value Output the value
Trigger rise
Count
Sampling interval
10ms
File output File output File output
Count period
0 0 1
Count
File output File output File output
1 2 0
2 times
Time
ON
OFF
ON
OFF
0