ABB ACS355 - Page 240

240 Actual signals and parameters
DI2 See selection DI1.2
DI3 See selection DI1.3
DI4 See selection DI1.4
DI5 See selection DI1.5
DI1(INV) External fault indication through inverted digital input DI1. 0:
Fault trip on EXT FAULT 1 (0014). Motor coasts to stop. 1:
No external fault.
-1
DI2(INV) See selection DI1(INV).-2
DI3(INV) See selection DI1(INV).-3
DI4(INV) See selection DI1(INV).-4
DI5(INV) See selection DI1(INV).-5
3004 EXTERNAL
FAULT 2
Selects an interface for an external fault 2 signal. NOT SEL
See parameter 3003 EXTERNAL FAULT 1.
3005 MOT THERM
PROT
Selects how the drive reacts when the motor
overtemperature is detected.
FAULT
NOT SEL Protection is inactive. 0
FAULT The drive trips on fault MOT OVERTEMP (0009) when the
temperature exceeds 110 °C, and the motor coasts to stop.
1
ALARM The drive generates alarm MOTOR TEMP (2010) when the
motor temperature exceeds 90 °C.
2
3006 MOT THERM
TIME
Defines the thermal time constant for the motor thermal
model, ie the time within which the motor temperature has
reached 63% of the nominal temperature with steady load.
For thermal protection according to UL requirements for
NEMA class motors, use the rule of thumb: Motor thermal
time = 35 · t6. t6 (in seconds) is specified by the motor
manufacturer as the time the motor can safely operate at six
times its rated current.
Thermal time for a Class 10 trip curve is 350 s, for a Class
20 trip curve 700 s, and for a Class 30 trip curve 1050 s.
500 s
256…9999 s Time constant 1 = 1 s
All parameters
No. Name/Value Description Def/FbEq
}
Motor load
Temp. rise
100%
63%
Par. 3006
t
t