Led Status; Data Collection Conditions; Trigger Logging - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

Data logging states at system switching
The following table lists the data logging states that change at system switching.
■When the control system is switched to the standby system
Before system switching (old control system)
Waiting Start Not Collected
Pause
Waiting to establish collection conditions Not collected
Collecting
Waiting trigger Collecting before trigger
After Trigger Collecting
■When the standby system is switched to the control system
Before system switching (old standby system)
Standby system start waiting
Standby system pause
Standby system no collection
Before using the data logging function, check if the SD memory card inserted in the standby system CPU
module has sufficient free space with a program. When the SD memory card inserted in the standby system
CPU module does not have sufficient free space and the systems are switched, an error occurs at the data
collection in the new control system and the data collection is finished.
To prevent occurrence of an error, use a program that turns on the annunciator when the free space of the SD
memory card of the standby system is smaller than the value of the criteria, such as the one shown below.
• For the above program, set "Both Systems Executions" for "Both Systems Program Executions Setting" of
the CPU parameter. ( Page 479 Program Execution in Both Systems)
• Set the value of the criteria in D0 in increments of K of the double word [unsigned].

LED status

The following table shows the LED status in the data logging states of the standby system.
State of the data logging function
Execution in All of the registered data logging sessions are in the "Standby System Start Waiting", "Standby
progress System Pause", or "Standby System No Collection" state.

Data collection conditions

When time specification has been set as a data collection condition and the systems are switched during data logging, time
measurement starts from 0 in the new control system, and data is not collected at the specified interval.

Trigger logging

If the systems are switched while trigger logging is being executed, logging data collected in the old control system is
discarded.
After system switching (new standby system)
Standby system start waiting
Standby system pause
Standby system no collection
After system switching (new control system)
Waiting Start Not Collected
Pause
Waiting to establish collection conditions Not collected
LED status
• CARD READY LED: On
• CARD ACCESS LED: Off
• FUNCTION LED: On
28 FUNCTIONS
28.15 Data Logging Function
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