YASKAWA Varispeed L7 - Page 175

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 Output Contactor Answer Back Detetcion
The output contactors can be observed using the output contactor answer back function. Therefore an auxil-
liary contact of the motor contactors must be connected to a digital input which is set to for this function
(H1-=86). If no answer back signal comes from the contactor, the inverter detects a SE1 fault (see below).
Multi-function Digital Inputs (H1-01 to H1-05)
SE1 fault (SE1:Contactor Feed-back Faults)
There are 3 possibilities of fault condition
Case 1: Output contactor of output inverter kept closing before contactor closed command set.
Case 2: Output contactor cannot be closed within the contactor close delay time.
Case 3 :Output contactor is opened during inverter running.
Set
Val ue
Function
Control Methods
V/f
Open
Loop
Vector
Closed
Loop ´
Vector
86 Output contactor answer back Yes Yes Yes
Up/Down
Speed selection
Speed
DC Injection/
zero servo
Inverter enable(D/I)
Contactor Faults
Contactor comformation
Contactor Control(D/O)
Run Delay
Contactor comformation
Contactor comformation
Case 1
Case 2
Case 3
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