CG Drives & Automation,01-5326-01r5 Functional Description 131
Stop Mode [33B]
When the AC drive is stopped, different methods to come to
a standstill can be selected in order to optimize the stop and
prevent unnecessary wear. Stop Mode sets the way of
stopping the motor when a Stop command is given.
Communication information
11.5.4 Mechanical brake control
The four brake-related menus [33C] to [33F] can be used to
control mechanical brakes e.g. to handle basic hoisting
functions. When hoisting a load generally a mechanical
brake holds the load when the AC drive is not running. To
prevent the load from falling down a holding torque must be
initiated before the mechanical brake is released. On the
other hand when stopping hoisting the brake must be
activated before the holding torque is removed.
Support is included for a Brake Acknowledge signal via a
digital input. It is monitored using a brake fault time
parameter. Additional output and trip/warning signals are
also included. The acknowledge signal is either connected
from the brake contactor or from a proximity switch on the
brake.
The brake acknowledge signal can also be used to improve
safety by preventing hoist falling load in case the brake is not
engaged when stopping.
Brake not released - Brake Fault trip
During start and running the brake acknowledge signal is
compared to the actual brake output signal and if no
acknowledge, i.e. brake not released, while brake output is
high for the Brake Fault time [33H], then a Brake trip is
generated.
Brake not engaged - Brake Warning
and continued operation (keep
torque)
The brake acknowledge signal is compared to the actual
brake output signal at stop. If acknowledge is still active, i.e.
brake not engaged, while brake output is low for the Brake
Engage time [33E] then a Brake warning is generated and
the torque is kept, i.e. prolonging normal brake engage
mode, until brake closes or an emergency action is needed
by the operator, such as setting down the load.
33B Stop Mode
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
EtherCAT and CANopen index (hex) 4c27
Profinet IO index 19495
Fieldbus format UInt
Modbus format UInt
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