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Operating Instructions ACU
235
19.2
Fan
The switch-on temperature of the heat sink fan can be set with
parameter Switch-On Temperature
39
.
If mains voltage is applied to the frequency inverter, and the heat sink temperature exceeds the set
temperature, the heat sink fan is switched on. Independent from parameter
Switch-On Temperature
39
, the heat sink fan will be switched on, as soon as the frequency inverter is switched on and
enabled and the start signal is received.
To protect the device, a device error will be triggered once an internal temperature
shutdown threshold is reached.
If the heat sink temperature drops below the set temperature by 5 °C, or if the controller enable
signal is inhibited, the heat sink fan is switched of when the minimum ON-time has elapsed.
The minimum ON-time of the heat sink fan is set internally to 1 minute. If the temperature drops
below
the Switch-On Temperature
39
during this time, the heat sink fan will be continue operation
until the minimum on time has elapsed.
Operation mode 43
for digital outputs additionally 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
anticlockwise are switched on, or if the
Switch-On Temperature
39
for the internal fan was reached.
Like in the case of the internal heat sink fan, the minimum ON-time of the external fan is 1 minute.
Parameter
Setting
No.
Description
Min.
Max.
Factory setting
39 Switch-On Temperature
0 °C
60 °C
30 °C
19.3
Bus controller
DANGER
Disconnect the frequency inverter from mains voltage and protect it against being
energized unintentionally.
Verify safe isolation from power supply.
Work on the device may only be started once the DC link capacitors have
discharged. The time to wait is at least 3 minutes in the case of sizes 1 through 7 .
When the frequency inverter is disconnected from power supply, the mains, DC-link
voltage and motor terminals may still be live for some time.
In order to be able to control the drive, the digital controller inputs S1IND/STOA and
S7IND/STOB must be connected and set to "High-Signal" in order to enable the output
stage.
The frequency inverters can be extended by different options for data communication and can be
integrate in an automation and control system in this way. Parameterization and commissioning can
be done via the optional communication card, the operating unit or the interface adapter.
Parameter
Local/Remote
412
defines the operating behavior and enables a change between the
control via contacts or the control unit and/or the interface.
Local/Remote 412
Function
0 - Control via contacts
The Start and Stop commands as well as the direction of rotation are
controlled via digital signals.
1 - Control via state
machine
The Start and Stop commands as well as the direction of rotation are
controlled via the DRIVECOM Statemachine of the communication
interface.
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