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Page 39
Revised 7/95 DFS-1 Manual
POWERTEC Ind. Corp.©
1. SET PARAMETER #5 FOR THE MASTER
MODE.
Set the basic operation in this parameter to
MASTER.
This parameter also has options for current control
(see page 16). Selecting MASTER into the
parameter takes care of the normal MASTER mode
operation case because the default is normal current
limits.
Other choices are torque limiting (either motoring
or regenerative) and horsepower control. If one of
these choices is made, it will be necessary to either:
1. Set up one analog input for a reference (see
INPUTS and OUTPUTS), or
2. Make provision to supply reference through
communications (see page 16).
2. SET PARAMETER #17 OR PARAMETER #21
IF AN ANALOG INPUT IS TO BE USED.
If an analog speed reference is to be used, either
Analog Input #1 (see page 20) or Analog Input #2
(see page 22) must be set to Speed Reference Input.
By default, Analog Input #1 is set up as a Speed
Reference Input and Analog Input #2 is a General
Purpose Input.
You must also set parameter #18 (0 to 10VDC by
default) or parameter #22 (4 to 20 milliamps default)
for the type of input. Then set up the scaling
(Engineering units) in parameters #19 and #20 for
Analog Input #1, or parameters #22 and #23 for
Analog Input #2.
If neither analog input is set up as a speed reference,
then the speed reference must be supplied from the
optional front panel control or from the
communications.
3. SET PARAMETER #8 FOR THE MASTER
ACCELERATION RATE.
Set the master speed acceleration time in
milliseconds (1 millisecond = .001 second). The
range is from 0 (speed changes are step functions)
to 255 seconds.
4. SET PARAMETER #9 FOR THE MASTER
DECELERATION RATE.
Set the master speed deceleration time in
milliseconds (1 millisecond = .001 second). The
range is from 0 (speed changes are step functions)
to 255 seconds.
4.2 MASTER MODE SETUP
5. SET PARAMETER #12 FOR A MASTER
PRESET SPEED.
This step is optional, if you wish to use a preset
speed which can be toggled by the PRESET
function. Enter the speed in Engineering Units.
6. SET PARAMETER #54 FOR SETPOINT
CONDITION (FLOAT OR FREEZE) AT
START-UP.
If you want the motor to return to the speed at which
it was running prior to shutdown or power loss, set
this parameter to Freeze.
If you want the motor to wait for the speed to be
reentered after a stop or power loss, enter Float in
this parameter. See page 30.
7. SET PARAMETER #48 FOR JUMP OR MOP
MODE.
Jump mode operation is to make UP/DOWN speed
changes temporary. MOP mode makes the DFS-1
act like a Motor Operated Potentiometer. See page
28.
8. SET PARAMETER #49 FOR MASTER JUMP
UP AMOUNT.
This is the amount (in Engineering Units) by which
the speed command will increase when the UP
function is activated. See page 29.
9. SET PARAMETER #50 FOR MASTER JUMP
DOWN AMOUNT.
This is the amount (in Engineering Units) by which
the speed command will decrease when the DOWN
function is activated. See page 29.