Mitsubishi Electric FR-F800 Series Instruction Manual page 276

5.7.4
If the undervoltage protection (E.UVT) activates due to unstable voltage in the power supply, the undervoltage level (DC bus
voltage value) can be changed.
Pr.
598
Undervoltage level
H102
*1 For the 200 V class
*2 For the 400 V class
NOTE
• Do not use this function when switching to an external battery, since the inrush current when power is restored increases, as
the undervoltage level is decreased.
• For the 200 V class inverters, the setting is available for the FR-F820-02330(55K) or lower.
• The Pr.598 setting is valid for induction motors. When either of the first or second motor is a PM motor, the Pr.598 setting is
invalid.
5.7.5
A fault (protective function) is initiated by setting the parameter.
This function can be used to check how the system operates at activation of a protective function.
Pr.
997
Fault initiation
H103
• To initiate a fault (protective function), set the assigned number of the protective function to be initiated in Pr.997.
• The value set in Pr.997 is not stored in EEPROM.
• When a protective function activates, the inverter output is shut off, a fault is displayed, and a fault signal (ALM, ALM2) is
output.
• The latest fault in the fault history is displayed while the fault initiation function is in operation. After a reset, the fault history
goes back to the previous status. (The protective function generated by the fault is not saved in the fault history.)
• Perform inverter reset to cancel the protective function.
• For the selectable parameter by Pr.997 and the corresponding protective functions, refer to
NOTE
• If a protective function is already operating, no fault can be activated by Pr.997.
• The retry function is disabled when a protective function has been initiated by the fault initiation function.
• If a fault occurs after a protective function has been activated, the protective function indication does not change. The fault is
not saved in the fault history either.
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Varying the activation level of the undervoltage
protective function
Name Initial value
9999
Initiating a protective function
Name Initial value
9999
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Setting range
*1
175 to 215 VDC
Set the DC voltage value at which E.UVT occurs.
*2
350 to 430 VDC
E.UVT occurs at 215 VDC (200 V class) / 430 VDC (400
9999
V class).
Setting range
The setting range is same with the one for fault data codes of the
16 to 253 inverter (which can be read through communication). Written data is not
stored in EEPROM.
The read value is always "9999". The protective function is not
9999
activated with this setting.
Description
Description
page 592.
5. PARAMETERS
5.7 (H) Protective function parameter
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