[32] Pulse
time-
based
Time-based pulse input measures the duration
between flanks. This number gives a higher
resolution at lower frequencies, but is not as
precise at higher frequencies. This principle has
a cut-off frequency that makes it unsuited for
encoders with low resolutions (30 ppr) at low
speeds.
Speed [rpm]
Speed [rpm]
Time[sec]
Time[sec]
a
b
130BB462.10
a Low encoder resolution
b Standard encoder resolution
Figure 6.11 Encoder Resolution Comparison
Read Timer:
20 timer tides
Read Timer:
20 timer tides
Time Start
Time counter
Sample time
Timer
Pulse
130BB464.10
Figure 6.12 Time Based Pulse Input
[34] Ramp bit
0
Enables a choice between one of the four
ramps available, according to
.
[35] Ramp bit
1
Same as Ramp bit 0.
Preset ramp bit
1
0
Ramp 1
0
0
Ramp 2
0
1
Ramp 3
1
0
Ramp 4
1
1
Table 6.7
[40]
Latched
Precise Start
A latched precise start only requires a pulse
of 3 ms on T18 or T19.
When using for 1–83 [1] or [2]:
When the reference is reached, the
adjustable frequency drive internally enables
the precise stop signal. The adjustable
frequency drive does the precise stop when
the counter value of
1-84 Precise Stop
Counter Value
is reached.
[41]
Latched
Precise Stop
inverse
Sends a latched stop signal when the
precise stop function is activated in
1-83 Precise Stop Function
. The latched
precise stop inverse function is available for
terminals 18 or 19.
[51]
External
interlock
This function makes it possible to give an
external fault to the drive. This fault is
treated in the same way as an internally
generated alarm.
[55]
DigiPot
increase
INCREASE signal to the digital potentiometer
function described in parameter group
3-9*
Digital Pot.Meter
[56]
DigiPot
decrease
DECREASE signal to the digital potenti-
ometer function described in parameter
group
3-9* Digital Pot.Meter
[57]
DigiPot Clear Clears the digital potentiometer reference
described in parameter group
3-9* Digital
Pot.Meter
[60]
Counter A
(Terminal 29 or 33 only) Input for increment
counting in the SLC counter.
[61]
Counter A
(Terminal 29 or 33 only) input for
decrement counting in the SLC counter.
[62]
Reset
Counter A
Input for reset of counter A.
[63]
Counter B
(Terminal 29 or 33 only) Input for increment
counting in the SLC counter.
[64]
Counter B
(Terminal 29 or 33 only) Input for
decrement counting in the SLC counter.
[65]
Reset
Counter B
Input for reset of counter B.
[70]
Mech. Brake
Feedback
Brake feedback for hoisting applications: Set
1-01 Motor Control Principle
to
[3] Flux w/
motor feedback
; set
1-72 Start Function
to
[6]
Hoist mech brake Ref.
[71]
Mech. Brake
Feedback
inv.
Inverted brake feedback for hoisting
applications
[72]
PID error
inverse
When enabled, it inverts the resulting error
from the process PID controller. Available
only if configuration mode is set to "Surface
Winder", "Extended PID Speed OL" or
"Extended PID Speed CL".
[73]
PID reset I-
part
When enabled, resets the I-part of the
process PID controller. Equivalent to
7-40 Process PID I-part Reset
. Available only if
configuration mode is set to "Surface
Winder," "Extended PID Speed OL," or
"Extended PID Speed CL".
[74]
PID enable
Enables the extended process PID controller.
Equivalent to
7-50 Process PID Extended PID
.
Available only if configuration mode is set
to "Extended PID Speed OL" or "Extended
PID Speed CL."
[80]
PTC Card 1
All digital inputs can be set to
[80] PTC Card
1
. However, only one digital input must be
set to this choice.
[91]
Profidrive
OFF2
The functionality is the same as the control
word bit of the profibus/profinet option.
[92]
Profidrive
OFF3
The functionality is the same as the control
word bit of the profibus/profinet option.
Programming
Instruction Manual
68
Danfoss A/S © Rev. 2014-02-07 All rights reserved.
MG37A222
6
6
Summary of Contents for VLT AutomationDrive FC 302
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