Start-Up
and
Adjustments
30
Line
3 - displays current limit status. The BRU-Series drive has been designed
to
display
the 'I Limit' message whenever the drive enters current limit.
Une
4 - displays 'FAC' and '
RAC'
clamp status. FAC is the forward amplifier clamp and
RAC
is the reverse amplifier clamp. When FAC is enabled (displayed on the screen) the
VCS input is clamped internally
to
0 when a positive voltage on
VCS
is detected. This
allows only negative velocity commands in velocity mode or only negative torque
commands
in
torque mode. The opposite effect occurs with
RAC.
When both FAC and
RAC
are enabled, velocity command
is
clamped
to
a in-velocity mooe
or
·torque command
is clamped
to
0
in
torque mode. Both 'FAC' and 'RAC' can be displayed simultaneously.
Une
5 -displays the 'Error' message when an error has been detected.
Monitor Information
The monitor information helps in setup and provides a powerful diagnostics tool. The monitor information
is selected on the Setup page
by
changing the monitor variable and
is
displayed on
two
lines in the lower
left comer
of
the Status page. The upper line shows the variable which is being monitored and the bottom
line shows
the
value
of
that variable. The monitor selected
on
the Setup page is also represented
by
an
analog voltage
at
the programmable monitor test point
or
at
the monitor
output
The variables which can
be monitored are:
ABS
ltorq
- Displays the absolute value
of
commanded torque producing current in units
of
AMPS.
I
Torq
- Displays the commanded torque producing current in units
of
AMPS. Note that I
Torq is the same as I
mag
for the S-Series and F-Series motors.
I
Ave-
Displays the average value of I Torq in units of AMPS. I Ave prevents the drive from
exceeding the current rating. The average value is computed by passing I Torq through a
low pass filter. The time constant
of
the filter is factory set
in
the personality module.
When the average current reaches the rated current
of
the motor, an excessive current
fault will
occur
.
Tach - Displays the velocity of the motor as determined from the encoder feedback in
units
of
RPM
. For forward motion, the velocity will be positive and
for
reverse motion, the
velocity will be negative.
Command
- Displays the value of the
VCS
command input in units
of
RPM
for velocity
mode and
AMPS
for torque mode. In the tune modes, command will be 0, since the
command is internally generated.
Posn - Displays the relative motor position in units
of
ROT
or rotations. Posn value will
increase
for
clockwise rotation
of
the motor shaft, viewed facing the motor drive end. It
will decrease
for
counter-clockwise rotation. For one complete rotation
of
the motor shaft,
the display should indicate a change
of
one rotation. Note that the display does not show
negative rotations, but will change from 0.0
to
some large positive number. This occurs
due
to
rollover of the position counter, but after this occurs. continuing
to
rotate the motor
counter-clockwise will cause Posn
to
decrease.
I
Limit
- Displays the present value
of
the current limit. The current limit will be set
at
either
the personality current limit (shown on the Setup page)
or
the external current limit
(available
at
connector
PS-4)
. The current limit is set
to
the lower of the
two
values.
BRU-200/BRU-500 Brushless Drives Instruction Manual
To Next Page
Loading...
