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Page 38
DFS-1 Manual Revised 7/95
POWERTEC Ind. Corp.©
6. SET PARAMETER #42 FOR THE DRIVE
GAIN.
This value is defaulted to 50% of the range and
therefore set to 128. This should be adequate for
many applications. If you are doing VERY close
tracking with other motors, it may be necessary to
increase this value, but it may be better to leave it
alone in the initial setup.
7. SET PARAMETER #43 FOR THE DRIVE
STABILITY.
This value is also defaulted to 50% and, like
parameter #42, is set to 128. If you have a high
inertia or pulsating load, it may be necessary to
increase this value, but it may be better to leave it
alone in the initial setup.
8. SET PARAMETER #44 FOR MOTORING
CURRENT LIMIT.
This value is defaulted to 100% of motor current.
There may be reasons to set this to a lower value
(such as during start-up), but, unless the drive is
specially set up, it doesn't do any good to set it to a
higher value. Other circuitry limits output current
to 150% of drive rating.
9. SET PARAMETER #45 FOR REGENERATIVE
CURRENT LIMIT.
This value is defaulted to 100% of motor current.
There may be reasons to set this to a lower value
(such as during start-up), but, unless the drive is
specially set up, it doesn't do any good to set it to a
higher value. Other circuitry limits output current
to 150% of drive rating.
10. SET PARAMETER #5 FOR MASTER MODE
OR A SLAVE MODE
Setting this parameter determines which remaining
parameters must be set up.
If setting up in MASTER Mode, proceed to
MASTER MODE SETUP (Section 4.2).
If setting up in a SLAVE mode, proceed to SLAVE
MODE SETUP (Section 4.3).
After setting MASTER or SLAVE, proceed to
INPUTS AND OUTPUT (Section 4.4).
If using an external communications, proceed to
COMMUNICATIONS setup (Section 4.5).
1. SET PARAMETER #6 FOR THE MAXIMUM
SPEED OF THE MOTOR IN RPM.
The base speed of the motor is listed on the
nameplate of the motor. If the base speed of the
motor is other than 1750, you must change
parameter #6. For instance, if the base speed of your
motor is 2500 RPM, enter 2500 into parameter #6.
2. SET PARAMETER #14 TO THE
ENGINEERING UNITS VALUE FOR
PARAMETER #6.
This is a number which is set equal to the base speed
of the motor. It may be any convenient value in
process or reference terms. If the speed of the motor
is 2500 RPM, but you want to scale this to 0 to
100.00 %, enter 10000 in parameter #14.
3. SET PARAMETER #7 TO THE PULSES PER
REVOLUTION OF THE ENCODER.
If the motor is a 4 pole motor (259TZ frame or
smaller) this number will be 120 (the default). If
the motor is an 8 pole motor, the number will be
240. A 600 PPR quadrature encoder will be set up
as 2400 in this parameter.
4. SET PARAMETER #46 TO X4 FOR MOST
APPLICATIONS.
Notable exceptions are for a servo application with
a 600 ppr encoder or other application where the
output frequency of the encoder may exceed 40
Khz. For example, a motor with a 600 ppr encoder
will reach 46Khz at 1150 rpm. This assumes that
parameter #7 (Encoder PPR) is set to 2400 and the
pulse multiplier is set to X4. Where the motor
would run faster than 1150 rpm, this parameter
should be set to X2 and parameter #7 should be set
to 1200 ppr. With these settings, the encoder
frequency would reach 50 Khz @ 2500rpm. Above
2500 rpm, the settings should be X1 for Pulse
Multiplier and 600 ppr for parameter #7.
5. SET PARAMETER #47 FOR THE
MODULATION MODE.
This parameter is defaulted to Non-Regenerative
operation. If you want Regenerative operation, you
must change it. Servo operation is regenerative
operation. There is also an option for the method
of modulation. See page 28.
Note: If regenerative mode is used, the drive may
require an optional DC bus loader to dissapate the
regenerative energy and avoid over voltage faults.
4.1 BASIC SETUP OF THE DFS-1 CONTROLLER