ABB ACS800 Firmware Manual page 195

Index Name/Selection
1...3 PTC
35.02 MOT 1 TEMP ALM L
-10 ... 5000 ohm/°C
(PTC/Pt100)
35.03 MOT 1 TEMP FLT L
-10 ... 5000 ohm/°C
(PTC/Pt100)
35.04 MOT 2 TEMP AI2 SEL Activates the motor 2 temperature measurement function and selects the
NOT IN USE
1xPT100
2XPT100
3XPT100
1...3 PTC
35.05 MOT 2 TEMP ALM L
-10 ... 5000 ohm/°C
(PTC/Pt100)
Description
The function is active. The temperature is supervised using one to three PTC
sensors. Analogue output AO1 feeds constant current through the sensor(s).
The resistance of the sensor increases sharply as the motor temperature rises
over the PTC reference temperature (T
resistor. The temperature measurement function reads the voltage through
analogue input AI1 and converts it into ohms. The figure below shows typical
PTC sensor resistance values as a function of the motor operating
temperature.
Temperature Resistance
Normal 0 ... 1.5 kohm
Excessive > 4 kohm
Defines the alarm limit for motor 1 temperature measurement. The alarm
indication is given when the limit is exceeded.
Limit in °C or ohms. °C: parameter
Ohm: parameter 35.01 is 1...3
Defines the fault trip limit for motor 1 temperature measurement. The fault
indication is given when the limit is exceeded.
Limit in °C or ohms. °C: parameter
Ohm: parameter 35.01 is 1...3
sensor type. Two motors can be protected only by using an optional analogue
extension module. Parameter
Note: If 98.12 is activated, the analogue I/O extension is also used for motor 1
temperature measurement (the standard I/O terminals are not in use).
Note: If an optional analogue I/O extension module RAIO is used for the
temperature measurement and
MOT 2 TEMP AI2 SEL are set to 1xPT100, analogue extension module input
signal range must be set to 0 ... 2 V (instead of 0 ...10 V) with DIP switches.
See 35.01.
See 35.01.
See 35.01.
See 35.01.
See 35.01.
Defines the alarm limit for the motor 2 temperature measurement function. The
alarm indication is given when the limit is exceeded.
See 35.02.
), as does the voltage over the
ref
Ohm
4000
1330
550
100
35.01 is 1xPT100, 2XPT100, 3XPT100.
PTC.
35.01 is 1xPT100, 2XPT100, 3XPT100.
PTC.
98.12 needs to be activated.
35.01 MOT 1 TEMP AI1 SEL and/or
FbEq
5
T
-10 ... 5000
-10 ... 5000
35.04
1
2
3
4
5
-10 ... 5000
Actual signals and parameters
195