ABB RDNA-01 Manuel d'utilisateur télécharger pdf (Page 156)

156 ACS550-01/U1 User’s Manual

Parameters

For other faults, or for anticipating motor overheating using a model, see Group 30:

FAULT FUNCTIONS.

Code Description

3501 SENSOR TYPE

Identifies the type of the motor temperature sensor used, PT100 (°C), PTC (ohm) or thermistor.

See parameters 1501

AO1 CONTENT SEL and 1507 AO2 CONTENT SEL.

0 =

NONE

1 = 1 x PT100 – Sensor configuration uses one PT100 sensor.

• Analog output

AO1 or AO2 feeds constant current through the sensor.

• The sensor resistance increases as the motor temperature rises, as does the voltage over the sensor.

• The temperature measurement function reads the voltage through analog input AI1 or AI2 and converts it to

degrees Celsius.

2 = 2 x PT100 – Sensor configuration uses two PT100 sensors.

• Operation is the same as for above 1 x PT100.

3 = 3 x PT100 – Sensor configuration uses three PT100 sensors.

• Operation is the same as for above 1 x PT100.

4 =

PTC – Sensor configuration uses one PTC.

• The analog output feeds a constant current through the sensor.

• The resistance of the sensor increases sharply as the motor

temperature rises over the PTC reference temperature (T

ref

), as

does the voltage over the resistor. The temperature measurement

function reads the voltage through analog input AI1 and converts it

into ohms.

• The table below and the graph show typical PTC sensor resistance

as a function of the motor operating temperature.

5 =

THERM(0) – Sensor configuration uses a thermistor.

• Motor thermal protection is activated through a digital input. Connect

either a PTC sensor or a normally closed thermistor relay to a digital

input.

• When the digital input is ‘0’, the motor is overheated.

• See the connection figure on page 155.

• The table below and the graph show the resistance requirements for a PTC sensor connected between 24 V and

a digital input as a function of the motor operating temperature.

6 =

THERM(1) – Sensor configuration uses a thermistor.

• Motor thermal protection is activated through a digital input. Connect a normally open thermistor relay to a digital

input.

• When the digital input is ‘1’, the motor is overheated.

• See the connection figure on page 155.

3502 INPUT SELECTION

Defines the input used for the temperature sensor.

1 =

AI1 – PT100 and PTC.

2 =

AI2 – PT100 and PTC.

3…8 =

DI1…DI6 – Thermistor and PTC

3503 ALARM LIMIT

Defines the alarm limit for motor temperature measurement.

• At motor temperatures above this limit, the drive displays an alarm (2010, MOTOR TEMP)

For thermistors or PTC connected to a digital input:

0 – de-activated

1 – activated

Excessive

Normal

Temperature Resistance

Normal < 1.5 kohm

Excessive > 4 kohm

Temperature Resistance

Normal < 3 kohm

Excessive > 28 kohm

1 2 ... 151 152 153 154 155 156 157 158 159 160 161 ... 319 320

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ABB RDNA-01 Manuel d'utilisateur Page 156

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