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Page 40
DFS-1 Manual Revised 7/95
POWERTEC Ind. Corp.©
1. SET PARAMETER #5 FOR THE SLAVE
MODE.
Set basic operation in this parameter to 1 for SLAVE
mode. For INVERSE SLAVE mode enter 2.
INVERSE SLAVE mode affects the way a setpoint
is entered.
This parameter also has options for current control
(see page 16). Setting a 1 takes care of the normal
SLAVE mode because the default is normal current
limits.
Other choices are torque limiting (either motoring
or regenerative) and horsepower control. For these
options 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 followed in
SLAVE mode, either Analog Input #1 (see page
20) or Analog Input #2 (see page 22) must be set to
1 (Speed Reference Input). By default, Analog Input
#1 is set up as a Speed Reference Input.
You must also set parameter #18 (0 to 10VDC by
default) or parameter #22 for the type of input. Then
set up the scaling parameters #19 and #20, or #22
and #23.
If neither analog input is set up as a speed reference
input, then the speed reference to be followed must
be supplied from the Frequency Reference In.
3. SET PARAMETER #15 FOR THE BASE
RATIO.
This is the number which is used to allow the
SETPOINT to be set at a desired number instead
of at a number dictated by gear ratios, motor speeds,
and other factors. See page 19.
4. SET PARAMETER #16 FOR THE MAXIMUM
RATIO.
This setting is the highest ratio allowed under any
circumstances.
5. SET PARAMETER #55 FOR THE MINIMUM
RATIO.
This setting is the smallest ratio allowed under any
circumstances.
6. SET PARAMETER #10 FOR THE SLAVE
ACCELERATION RATE.
Set slave speed acceleration time in milliseconds
(1 millisecond = .001 second). The range is from 0
(speed changes are step functions) to 255 seconds.
See page 18.
7. SET PARAMETER #11 FOR THE SLAVE
DECELERATION RATE.
Set the slave speed deceleration time in milliseconds
(1 millisecond = .001 sec). The range is from 0
(speed changes are step functions) to 255 seconds.
See page 18.
8. SET PARAMETER #13 FOR A SLAVE
PRESET RATIO.
This step is optional, if you wish to use a preset
ratio which can be toggled by the PRESET function.
Enter the speed in Engineering Units.
9. SET PARAMETER #54 FOR SETPOINT
CONDITION AT START-UP.
If you want the motor to return to the ratio at which
it was running prior to shutdown or power loss, set
this parameter to 1. If you want the motor to wait
for the ratio to be reentered after a stop or power
loss, enter 0. See page 30.
10. SET PARAMETER #48 FOR JUMP OR MOP
MODE.
Jump mode operation is to make UP/DOWN ratio
changes temporary. MOP mode makes the DFS-1
act like a Motor Operated Potentiometer. See page
28.
11. SET PARAMETERS #51 AND #52 FOR SLAVE
JUMP UP/DOWN AMOUNTS.
These are the amounts (in Engineering Units) by
which the ratio command will increase or decrease
when the UP or DOWN functions are activated.
See page 29.
4.3 SLAVE MODE SETUP