Undertorque Detection - YASKAWA VS-606V7 Series Instruction Manual

Undertorque Detection

An alarm signal can be output to a multi-function output terminal (MA, MB,
P1, or P2) when the load on the machine side suddenly becomes lighter (i.e.,
when an undertorque occurs).
To output an undertorque detection signal, set the output terminal function
selection in n057, n058, or n059 to 8 (undertorque detected, NO contact) or
9 (undertorque detected, NC contact).
MULTI-FUNCTION OUTPUT TERMINAL
(UNDERTORQUE DETECTION SIGNAL)
MA, MB, P1, P2
* Undertorque detection release width (hysteresis) is set at approx. 5% of the inverter's rated
current.
Undertorque detection function selection 1 (n177)
Setting
0
1
2
3
4
(1) To detect undertorques during acceleration, set to 3 or 4.
(2) To continue operation after undertorque detection, set to 1 or 3. During
detection, the operator displays the "UL3" alarm (blinking).
(3) To halt the inverter by a fault at undertorque detection, set to 2 or 4. At
detection, the operator displays the "UL3" fault (continuously lit).
MOTOR CURRENT
n118
ON
n119
Undertorque detection not provided.
Detected during constant-speed running. Operation
continues after detection.
Detected during constant-speed running. Operation stops.
Detected during running. Operation continues after detection.
Detected during running. Operation stops.
*
ON
n119
Description
*
TIME
125