Baldor VS1STS Series Installation & Operating Manual page 46

Par
Description
No.
Modbus
P6-08 Communication Loss
Timer
P6-09 Speed Droop Control
7-14 Parameter Descriptions
Table 7-7 Application Specific Parameters Continued
Range
0: disabled
1..60
0.0 ...25.0% of P1-03
Units Default
This parameter controls the
behavior of the drive in the event
of a loss of communication
between drive and Modbus
Network Master while the
drive is operating. When set
to zero, the drive will continue
running if communication with
the Modbus master is lost.
When set to a value larger than
zero, the drive will trip after the
s 2
number of seconds specified in
this parameter.
This parameter is active
regardless of the setting of
P1-07; hence even if the
Modbus Network Master is
being used to monitor the drive
rather than control it, a loss of
communication will still cause
the drive to trip.
This parameter only applies
when the drive is in vector
speed control mode. (P4-
01=0) When set to zero, the
speed droop control function
is disabled. If P6-09 > 0, this
parameter effectively defines a
slip speed at motor rated output
torque.
The droop speed is the
percentage value of P1-03.
Hz 0 Depending on the motor load
condition, the reference speed
will be reduced by a certain
droop value before going into
the speed controller.
See equations below:
Droop speed = P6-09 * P1-03
Droop value = Droop speed * (
Motor real torque / Motor rated
torque)
Speed controller input = Speed
reference – Droop value
Explanation
MN767S