BONFIGLIOLI ACTIVE Cube ACU 201-01, Operating Instructions Manual

Page: 250 / 292

A warning limit allows the user to prevent an imminent I²t-fault trip through appro-
priate measures.
Warning limit motor I
2
t
615 is used to set the warning signal between 6% and
100% of thermal capacity.
Parameter Settings
No. Description Min. Max. Fact. sett.
608 Thermal time constant Motor 1 min 240 min 30 min
609 Thermal time constant Stator 1 s 600 s 15 s
615 Warning Limit Motor I
2
t 6% 100% 80%
Output signals
Digital signals indicate the triggering of the function “Motor Protection Switch”.
180 - Warning Motor
Protection
1)
Triggering of the function “Motor Protection Switch”
according to
Operation Mode
571 is signalized.
14 -
2)
1)
For linking with inverter functions
2)
For digital output
18.6 V-belt Monitoring
Continuous monitoring of the load behavior and thus of the connection between the
3-phase machine and the load is the task of the V-belt monitoring system. Parameter
Operation Mode
581 defines the functional behavior if the
Active Current
214 or the
torque-forming current component
Isq
216 (field -orientated control method) drops
below the set
Trigger Limit Iactive
582 for a time longer than the set
Delay
Time
583.
Operation mode
581 Function
0 - Off The function is deactivated.
1 - Warning
If the active current drops below the threshold value,
the warning "A8000" is displayed.
2 - Error
The unloaded drive is switched off and fault message
"F0402" is displayed.
The error and warning messages can be read out by means of the digital outputs
(signal 22 - “Warning V-Belt”) or reported to an overriding control system. The
Trig-
ger limit Iactive
582 is to be parameterized as a percentage of the
Rated current
371 for the application and the possible operating points.
Parameter Settings
No. Description Min. Max. Fact. sett.
582 Trigger limit Iactive 0.1 % 100.0 % 10.0 %
583 Delay time 0.1 s 600.0 s 10.0 s
250 Operating Instructions ACU 06/13