Motor Contactor Answer Back Detection - Omron VARISPEED L7 Manual

Setting Example
When the timer function input is ON for longer than b4-01, the timer output function is turned ON. When the
timer function input is OFF for longer than b4-02, the timer output function is turned OFF. An example of
timer function operation is given in the following diagram.
Timer function input
Timer function output

Motor Contactor Answer Back Detection

The motor contactors can be observed using the motor contactor answer back function. Therefore an auxiliary
contact of the motor contactors must be connected to a digital input which is set to for this function
(H1- =86). If the contactor close command is set and no answer back signal comes from the contactor, the
inverter detects a SE1 fault (see below). Parameter S1-28 selects if the detection is enabled or disabled and
whether the SE1 fault is reset automatically or if has to be reset manually.
Related Parameters
Parameter
No.
Selects how a SE1 fault is reset.
0: Manual Reset
S1-28
1: Automatic reset at stop
2: No SE1 detection
Multi-function Digital Inputs (H1-01 to H1-05)
Set
Value
86
Fig 6.21 Timer Function Operation Example
Name
Function
Motor contactor answer back
Change
Factory
during
Setting
V/f
Operation
0 No A
Control Methods
Open
V/f Loop
Vector
Yes Yes
Control Methods
Closed
Open Closed
Loop
Loop Loop
Vector
Vector Vector
(PM)
A A A
Closed
Closed
Loop
Loop ´
Vector
Vector
(PM)
Yes Yes
6-
6
53