VLT
®
5000 FLUX
Reference
Handling
■
Programming of stop at torque limit
In applications with an external electro-mechanical
brake, such as hoisting applications, it is possible
to stop the frequency converter via a ‘standard
’
stop command, while at the same time activating
the external electro-mechanical brake.
The example below illustrates the programming
of frequency converter connections.
The external brake can be connected to relay 01
or 04, see
Control of mechanical brake
. Program
terminal 27 to
Coasting stop, inverse
[0] or
Reset
and coasting stop, inverse
[1], as well as terminal
46 to
Torque limit and stop
[27].
Description:
If a stop command is active via terminal 18 and
the frequency converter is not at the torque limit,
the motor will ramp down to 0 rpm.
If the frequency converter is at the torque limit and
a stop command is activated, terminal 46
Output
(programmed to
Torque limit and stop
[27]) will be
activated. The signal to terminal 27 will change from
’
logic 1
’
to
’
logic 0
’
and the motor will start coasting.
-
Start/stop via terminal 18.
Parameter 302 =
Start
[1].
-
Quickstop via terminal 27.
Parameter 304 =
Coasting stop, inverse
[0].
-
Terminal 46 Output
Parameter 319 =
Torque limit and stop
[27].
-
Terminal 01 Relay output
Parameter 323 =
Mechanical brake control
[32].
MG.55.A6.02 - VLT is a registered Danfoss trademark
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