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4 APPLICABLE FUNCTIONS
4.6 Drive recorder
• The drive recorder does not operate in the following cases.
When using the graph function with an engineering tool.
When using the machine analyzer function.
When [Pr. PF21 Drive recorder switching time setting] is set to "-1" (Drive recorder function disabled).
• For the alarm (common alarm) which applies to all axes of a multi-axis servo amplifier, the drive recorder
data is saved on individual axes. For the alarm (axis-specific alarm) which applies to a specific axis of a
multi-axis servo amplifier, the drive recorder data is only saved on the axis at which the alarm occurred, and
the drive recorder data of other axes is not saved.
• To read recorded data from the drive recorder by using the FTP server function, use a network supporting
the function.
• When the drive recorder data (JSON) files on the server are listed by using the FTP server function, the file
size will appear as 0 bytes.
• Even if the trigger is satisfied while the save processing on the servo amplifier side is not completed, the
drive recorder data of other axes are not saved.
Precautions
• When using the graph function with an engineering tool, the drive recorder function cannot be used. To use the drive
recorder function, wait until the time set in [Pr. PF21 Drive recorder switching time setting] passes, cycle the power of the
servo amplifier, or perform the software reset after using the graph function.
• If the sampling cycle of an analog trigger or digital trigger is too long, the establishment of the trigger may not be able to be
detected. In that case, shorten the sampling cycle.
• If the power supply of the servo amplifier is turned off during data storage of the drive recorder (immediately after alarm
occurrence), data at alarm occurrence may not be recorded normally.
• The storage area of the servo amplifier has a limit for the number of writings. When using the manual setting mode with the
drive recorder, be sure to consider the number of writings.
• If the drive recorder detects a trigger, the next trigger cannot be detected until the data has been saved.
• In the initial settings, recorded data cannot be read from the drive recorder by using the FTP server function. Change the
setting of "drive recorder data readout permission selection" in the network parameter "authorization level". For information
on account settings and network parameters, refer to "NETWORK FUNCTION".