15.3.4
Flux Forming finished
If operation mode 30 is selected for a digital output the corresponding output be-
comes active when the flux formation is ended. The time for the flux formation re-
sults from the operating state of the machine and the set parameters for magnetizing
the machine. The magnetizing can be defined via the starting behavior and is influ-
enced by the amount of the set starting current.
15.3.5
Brake release
The Open brake function in operation mode 41 enables the activation of a corre-
sponding unit via the digital control output. The function uses both the control com-
mands via the contact inputs and the set starting and stopping behavior for control-
ling the digital output.
According to the configured starting behavior, the output is switched on when the
magnetizing of the motor is finished. When the
Brake release time
625 has elapsed,
the drive is accelerated.
The stopping behavior of the drive depends on the configuration of the parameters
Operation Mode
630. This is described in chapter "Stopping Behavior".
If stopping behavior 2 or 5 with stop function is selected, the drive is controlled to
zero speed and the digital output is not switched off. In the other operation modes of
the stop behavior, the control of the brake is possible. At the start of a free coasting
of the drive, the digital output is switched off.
This is similar to the behavior in the case of the stopping behavior with shutdown.
The drive is decelerated and supplied with current for the set holding time. Within
the set holding time, the control output is switched off and thus the brake activated.
Control of Brake
Stopping Behavior
0
Operation mode "41-Open brake" switches off the digital
output assigned to the function immediately. The me-
chanical brake is activated.
Stopping Behavior
1, 3, 4, 6, 7
Operation mode "41-Open brake" switches off the digital
output assigned to the function when
Switch-Off Thresh-
old
637 is reached. The mechanical brake is activated.
Stopping Behavior
2, 5
Operation mode "41-Open brake" leaves the digital out-
put assigned to the function switched on. The mechanical
brake remains open.
15.3.6
Current Limitation
Operation modes 15 to 19 link the digital outputs and the relay output to the
functions of the intelligent current limits. The reduction of power by the set figure in
percent of the rated current depends on the selected operation mode. Accordingly,
the event for intervention of the current limitation can be output via the operation
modes of the digital outputs. If the function of the intelligent current limits is deac-
tivated within the sensorless control, operation modes 16 to 19 are switched off in
the same way.
15.3.7
External Fan
Operation mode 43 enables the control of an external fan. Via the digital output,
the fan is switched on if the controller is released and Start clockwise or Start anti-
clockwise are switched on, or if the
Switch-On Temperature
39 for the internal fan
was reached.
186
Operating Instructions ACU
06/13
Summary of Contents for ACTIVE Cube ACU 201-01
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