ABB ACS350 User Manual page 210

210
Parameters – complete descriptions
Index Name/Selection
PTC
THERM(0)
THERM(1)
3502 INPUT SELECTION
AI1
AI2
DI1
DI2
DI3
DI4
DI5
3503 ALARM LIMIT
x...x
3504 FAULT LIMIT
x...x
Actual signals and parameters
Description
The function is active. The temperature is supervised using PTC sensor.
Analog output AO feeds constant current through the sensor. The resistance
of the sensor increases sharply as the motor temperature rises over the PTC
reference temperature (Tref), as does the voltage over the resistor. The
temperature measurement function reads the voltage through analog input
AI1/2 and converts it into ohms. The figure below shows typical PTC sensor
resistance values as a function of the motor operating temperature.
ohm
4000
1330
550
100
The function is active. Motor temperature is monitored using a PTC sensor
(see selection PTC) connected to drive via a normally closed thermistor relay
connected to a digital input. 0 = motor overtemperature.
The function is active. Motor temperature is monitored using a PTC sensor
(see selection PTC) connected to drive via a normally open thermistor relay
connected to a digital input. 1 = motor overtemperature.
Selects the source for the motor temperature measurement signal.
Analog input AI1. Used when PT100 or PTC sensor is selected for the
temperature measurement.
Analog input AI2. Used when PT100 or PTC sensor is selected for the
temperature measurement
Digital input DI1. Used when par.
THERMI(0)/(1).
Digital input DI2. Used when par.
THERMI(0)/(1).
Digital input DI3. Used when par.
THERMI(0)/(1).
Digital input DI4. Used when par.
THERMI(0)/(1).
Digital input DI5. Used when par.
THERMI(0)/(1).
Defines the alarm limit for motor temperature measurement. Alarm MOTOR
TEMP indication is given when the limit is exceeded. When par.
SENSOR TYPE value is set to THERMI(0)/(1): 1 = alarm.
Alarm limit
Defines the fault trip limit for motor temperature measurement. The drive trips
on fault MOT OVERTEMP when the limit is exceeded. When par.
SENSOR TYPE value is set to THERMI(0)/(1): 1 = fault.
Fault limit
Temperature Resistance
Normal 0 ... 1.5 kohm
Excessive > 4 kohm
T
3501 SENSOR TYPE value is set to
3501 SENSOR TYPE value is set to
3501 SENSOR TYPE value is set to
3501 SENSOR TYPE value is set to
3501 SENSOR TYPE value is set to
Def, FbEq
4
5
6
AI1
1
2
3
4
5
6
7
0
3501
-
0
3501
-