Toshiba G7 Manuale di istruzioni

TOSHIBA

G7APPLICATION GUIDELINE 8.0

*For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-2192

Configuring Analog Inputs

Introduction

The G7 allows several parameters to be controlled by either a 4-20[mA] or 0-10[V] analog input.

These parameters include upper limit frequency, acceleration/ deceleration time, and torque boost.

This application note will walk you through all of the steps necessary to configure the G7’s analog

inputs. The functioning of the controlled parameters will also be discussed.

Before starting, you should consider that several parameters might be controlled by a single input.

Care should be taken to ensure that only the desired parameters are being controlled by the analog

inputs, and that these parameters are being controlled in the appropriate manner

Connections

Programming

Parameter Location Default Value New Value

Upper Limit Frequency

Adjustment

Program →Terminal Selection

Parameters →Analog Input Functions Disabled Use RR*

Acceleration Time Adjustment Program →Terminal Selection

Parameters →Analog Input Functions Disabled Use RR*

Deceleration Time Adjustment Program →Terminal Selection

Parameters →Analog Input Functions Disabled Use RR*

TOSHIBA

G7APPLICATION GUIDELINE 8.0

*For additional assistance, please contact Toshiba Adjustable Speed Drive Marketing Dept. at (800) 872-2192











−

][10

][

][24

])[4(

mAX

Torque Boost Adjustment Program →Terminal Selection

Parameters →Analog Input Functions Disabled Use RR*

* The VI/II input terminal can also be used.

Notes

For upper limit frequency the analog input will limit the upper limit frequency in the range 0 - UL[Hz]. If

the analog input receives 4[mA] or 0[V], the upper limit frequency will be 0[Hz]. If the analog input

receives 20[mA] or 10[V] the upper limit frequency will be set by Upper Limit in Program →

Fundamental Parameters →Frequency Settings. Intermediate inputs will result in a linear setting of

the upper limit frequency by the formula

Upper limit Frequency =

Where X is the input analog input in either mili-Amps or Volts. Note: accel/decel times are still

calculated with reference to Maximum Frequency.

Acceleration/Deceleration Time Adjustment - The analog input will determine a multiplier to the

Accel/Decel #1 parameters set in Program →Fundamental Parameters →Accel/Decel #1 Settings.

With a minimum input resulting in a multiplier of 1 and a maximum input resulting in a multiplier of 10

with intermediate inputs giving a linear multiplier between 1 and 10.

Torque Boost Adjustment – The analog input will determine the percentage of Torque Boost that the

drive will output at low speeds in a manner similar to that mentioned in the description of upper limit

frequency discussed above.

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