90 Functional Description Emotron AB 01-3694-01r2
Start Mode [339]
Sets the way of starting the motor when a run command is
given.
Communication information
Spinstart [33A]
The spinstart will smoothly start a motor which is already
rotating by catching the motor at the actual speed and con-
trol it to the desired speed. If in an application, such as an
exhausting fan, the motor is already rotating due to external
conditions, a smooth start of the application is required to
prevent excessive wear. With the spinstart=on, the actual
control of the motor is delayed due to detecting the actual
speed and rotation direction, which depend on motor size,
running conditions of the motor before the Spinstart, inertia
of the application, etc. Depending on the motor electrical
time constant and the size of the motor, it can take maxi-
mum a couple of minutes before the motor is caught.
Communication information
Stop Mode [33B]
When the VSD is stopped, different methods to come to a
standstill can be selected in order to optimize the stop and
prevent unnecessary wear, like water hammer. Stop Mode
sets the way of stopping the motor when a Stop command is
given.
Communication information
11.4.4 Mechanical brake control
The four brake-related menus [33C] to [33F] can be used to
control mechanical brakes.
Brake Release Time [33C]
The Brake Release Time sets the time the VSD delays before
ramping up to whatever final reference value is selected.
During this time a predefined speed can be generated to
hold the load where after the mechanical brake finally
releases. This speed can be selected at Release Speed, [33D].
Immediate after the brake release time expiration the
mechanical break flag is set. The user can set a digital output
or relay to the function Brake. This output or relay can con-
trol the mechanical brake.
Communication information
Default: Fast (fixed)
Fast 0
The motor flux increases gradually. The
motor starts rotating immediately once the
Run command is given.
Modbus Instance no/DeviceNet no: 43109
Profibus slot/index 169/13
Fieldbus format UInt
Modbus format UInt
Default: Off
Off 0
No spinstart. If the motor is already running
the VSD can trip or will start with high cur-
rent.
On 1
Spinstart will allow the start of a running
motor without tripping or high inrush cur-
rents.
Modbus Instance no/DeviceNet no: 43110
Profibus slot/index 169/14
Fieldbus format UInt
Modbus format UInt
339 Start Mode
Stp Fast
A
33A Spinstart
Stp Off
A
Default: Decel
Decel 0
The motor decelerates to 0 rpm according
to the set deceleration time.
Coast 1 The motor freewheels naturally to 0 rpm.
Modbus Instance no/DeviceNet no: 43111
Profibus slot/index 169/15
Fieldbus format UInt
Modbus format UInt
Default: 0.00 s
Range: 0.00–3.00 s
Modbus Instance no/DeviceNet no: 43112
Profibus slot/index 169/16
Fieldbus format Long, 1=0.01 s
Modbus format EInt
33B Stop Mode
Stp Decel
A
33C Brk Release
Stp 0.00s
A
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