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Page 31
Revised 7/95 DFS-1 Manual
POWERTEC Ind. Corp.©
39. DIGITAL OUTPUT #2
FUNCTION
USE PARAMETER #39 TO SELECT THE #2
DIGITAL OUTPUT FUNCTION.
RANGE OF VALUES: 0000 0000h to 0001 000Fh
no decimal significance
Default Value: 0000 0001h no decimal
significance
The setting options are the same as parameter
#38. The default, by factory setting, is 0000 0001h,
which is the FAULT output. The internal FAULT
circuitry of the DFS-1 is off when the input power is
applied and energizes if there are NO FAULTS in the
drive (the contact closes because VL1 is set to 01h).
40. DIGITAL OUTPUT #3
FUNCTION
USE PARAMETER #40 TO SELECT THE #3
DIGITAL OUTPUT FUNCTION.
RANGE OF VALUES: 0000 0000h to 0001 000Fh
no decimal significance
Default Value: 0001 0002h no decimal
significance
The setting options are the same as parameter
#38. The default, by factory setting, is 0001 0002h,
which is the AT SPEED output. The internal AT
SPEED circuitry of the DFS-1 is on when the actual
speed of the motor matches the commanded speed
(the contact closes because VL3 is set to 01). There
are no AT SPEED window parameters because the
microprocessor filters and averages the speed signal.
41. DIGITAL OUTPUT #4
FUNCTION
USE PARAMETER #41 TO SELECT THE #4
DIGITAL OUTPUT FUNCTION.
RANGE OF VALUES: 0000 0000h to 0001 000Fh
no decimal significance
Default Value: 0001 0003h no decimal
significance
The setting options are the same as parameter
#38. The default, by factory setting, is 0001 0003h,
which is the REMOTE output. When the DFS-1 is in
the remote mode, the contact between the terminals
closes (the contact closes because VL3 is set to 01h).
42. DRIVE GAIN SETTING
USE PARAMETER #42 TO SET THE INTERNAL
CURRENT GAIN OF THE DRIVE.
RANGE OF VALUES: 0000 0000h to 0000 00FFh
0 to 255 (decimal)
Default Value: 0000 0080h 128 (decimal)
The gain of the DFS-1 is set by parameter #42.
The effect of the gain setting is to adjust an internal
value which determines how many pulses of accumu-
lated shaft position error it takes to reach current
limit. A 00h will allow about 90 pulses of position
error while a setting of FFh allows only about 9
pulses, which makes the motor shaft very “stiff”, in
that turning it only a few degrees causes current to
increase very rapidly. A middle setting is the default.
43. DRIVE STABILITY SETTING
USE PARAMETER #43 TO SET THE INTEGRAL
CURRENT GAIN OF THE DRIVE.
RANGE OF VALUES: 0000 0000h to 0000 00FFh
0 to 255 (decimal)
Default Value: 0000 0080h 128 (decimal)
The stability of the DFS-1 is set by parameter
#43. The effect of the setting is to adjust an internal
value which controls the integral and differential
gains of the drive. Smaller numbers mean faster
reaction to changes and for higher numbers reaction
is more damped. A middle setting is the default.
44. DRIVE MOTORING
CURRENT LIMIT
USE PARAMETER #44 TO SET THE MOTORING
CURRENT LIMIT OF THE DRIVE.
RANGE OF VALUES: 0000 0000h to 0000 0096h
0 to 150% (decimal)
Default Value: 0000 0032h 50% (decimal)
Parameter #44 allows current limit settings of up
to 150% and must be set in terms of MOTOR
current. Other circuitry in the motor control will