I/O Phase Loss Protection Selection; Retry Function - Mitsubishi Electric FR-A800 Series Instruction Manual

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.

5.10.7 I/O phase loss protection selection

The output phase loss protection function, which stops the inverter output if one of the three phases (U, V, W) on the inverter's
output side (load side) is lost, can be disabled.
The input phase loss protective function on the inverter input side (R/L1, S/L2, T/L3) can be enabled.
Pr.
251 Output phase loss
H200 protection selection
872
Input phase loss
*1
protection selection
H201
*1 The setting is available for the standard structure model and the IP55 compatible model.
 Output phase loss protection selection (Pr.251)
• When Pr.251 is set to "0", output phase loss protection (E.LF) becomes invalid.
 Input phase loss protection selection (Pr.872) (Standard models and IP55
compatible models)
• When Pr.872 is set to "1", Input phase loss (E.ILF) protection is activated if one of three phases is lost for 1 second.
NOTE
• When several motors are connected, output phase loss cannot be detected even if the wiring to one motor loses phase.
• If an input phase is lost while Pr.872 = "1" (with input phase loss protection), Pr.261 Power failure stop selection ≠ "0" (power
failure stop function enabled), the motor decelerates to stop without outputting E.ILF.
• In the case of R/L1, S/L2 phase loss, the input phase loss protection does not operate, and the inverter output is shut off.
• If an input phase loss continues for a long time, the lives of converter section and capacitor of the inverter become shorter.
Parameters referred to
Pr.261 Power failure stop

5.10.8 Retry function

This function allows the inverter to reset itself and restart at activation of the protective function (fault indication). The retry
generating protective functions can also be selected.
426
5. PARAMETERS
5.10 (H) Protective function parameter
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Name Initial value
9999
Name Initial value
1
0
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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.
Setting range
0 Output phase loss protection disabled
1 Output phase loss protection enabled
0 Input phase loss protection disabled
1 Input phase loss protection enabled
Description
page 776.
Description