Baldor VS1MXS series, Installation & Operating Manual

Page: 54 / 88

7-20 Parameter Descriptions MN762S
Par
No.
Description Range Units Default Explanation
P6-08
Modbus
Communication
Loss Timer 0: disabled
1..60
s 2
This parameter controls the
behavior of the drive in the event of
a loss of communication between
drive and Modbus Network Master
whilst 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 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.
P6-09
Speed Droop
Control 0.0 …25.0%
of P1-03
Hz 0
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. Depending on the
motor load condition, the reference
speed will be reduced by a certain
droop value before goes into 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
Table 7-7 Application Specific Parameters Continued