Mitsubishi Electric FR-F800 Series Instruction Manual page 277

5.7.6 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 continuously 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
5.7.7 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.
When the automatic restart after instantaneous power failure function is selected (Pr.57 Restart coasting time ≠ 9999), the
restart operation is also performed after a retry operation as well as after an instantaneous power failure. (For restart operation,
refer to page 466 and
Pr. Name
65
Retry selection
H300
67 Number of retries at fault
H301 occurrence
68
Retry waiting time
H302
69 Retry count display
H303 erase
 Setting the retry function (Pr.67, Pr.68)
• When the inverter protective function is operating (fault indication), the retry function automatically cancels (resets) the
protective function after the time set in Pr.68. The retry function then restarts the operation from the starting frequency.
276
5. PARAMETERS
5.7 (H) Protective function parameter
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Name Initial value
1
0
selectionpage 478
page 472 for selection.)
Initial
Setting range
value
0 0 to 5
0
1 to 10
0
101 to 110
1 s 0.1 to 600 s
0 0
search engine
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
Faults which trigger the retry operation can be selected.
The retry function disabled.
Set the number of retries at a fault occurrence.
A fault output is not provided during the retry operation.
Set the number of retries at a fault occurrence. (The setting value minus
100 is the number of retries.)
A fault output is provided during the retry operation.
Set the time delay from when an inverter fault occurs until the retry
operation starts.
Setting "0" clears the retry success counter ("retry success" means that
the inverter successfully restarts).
Description