Yaskawa Matrix Converter User Manual

Page 215

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Undertorque Detection

Changing Overtorque and Undertorque Detection Levels Using an Ana-
log Input

If parameter H3-09 (Terminal A2 Function Selection) or H3-05 (Terminal A3 Function Selection) is set to 7
(overtorque/undertorque detection level), the overtorque/undertorque detection level can be changed.

If the overtorque/undertorque detection level is changed using the multi-function analog input, only over-
torque/undertorque detection level 1 will be enabled.

The following diagram shows the overtorque/undertorque detection level using an analog input.

Fig 6.38 Overtorque/Undertorque Detection Level Using an Analog Input

Multi-Function Analog Input (H3-05, H3-09)

Set

Value

Function

Contents (100%)

Control Methods

V/f

Open

Loop

Vector

Flux

Vector

Overtorque/undertorque detection level

Motor rated torque for vector control
MxC rated output current for V/f control

Yes

Motor current (output torque)

Undertorque detection 1 NO
or Undertorque detection 2 NO

L6-03
or
L6-06

The undertorque detection disabled margin is approximately 10% of the MxC rated output
current (or motor rated torque)

L6-02 or L6-05

Detection level

Multi-function analog input
terminal A2, A3 input level

(4 mA)

(20 mA)

100%

10 V