33 FUNCTIONS
33.7 Data Logging Function
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33.7 Data Logging Function
This section describes restrictions when the data logging function is used.
Data to be collected
Only data in standard devices can be collected. ( Page 171 Data to be collected)
Although data logging cannot be executed by specifying safety devices and safety labels, data in safety
devices and safety labels can be collected by taking the following steps ( to ).
: Transfer the values of the target safety device or safety label to a standard/safety shared label.
: Transfer the values of the standard/safety shared label specified in Step to a standard device.
: Logs standard devices specified in Step .
Data collection conditions
As a sampling interval, only "Each scanning cycle" can be set.
Trigger conditions
Only standard devices can be specified as monitoring data of when "Device change specification" is selected as the trigger
condition. "Step No. specification" can be selected only for standard programs.
Output settings
With the Safety CPU, even if set to "Output with device comment" in the output settings "Device comment output" item, device
comments are not output to the file.
Auto logging
If a sampling interval of the data logging function is set to the one other than "Each scanning cycle", data logging registration
fails at the start of auto logging and an error occurs.
Safety control
Target safety device
(SA\D0)
Transfer data. Transfer data.
Standard/safety shared label
(G_LOGGING)
Standard control
Standard device (D0)
Data logging is performed
to the standard device
where the transferred
safety device data is stored.
Safety program Standard program
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