Danfoss VLT AutomationDrive FC 302 Instruction Manual page 70

Programming
[32] Pulse
time-
based
6 6
[34] Ramp bit
0
[35] Ramp bit
1
Preset ramp bit
Ramp 1
Ramp 2
Ramp 3
Ramp 4
Table 6.7
[40] Latched
Precise Start
[41] Latched
Precise Stop
inverse
[51] External
interlock
68
Instruction Manual
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]
a Time[sec] b Time[sec]
a Low encoder resolution
b Standard encoder resolution
Figure 6.11 Encoder Resolution Comparison
Pulse
Timer
Sample time
Time counter
Time Start Read Timer: Read Timer:
20 timer tides 20 timer tides
Figure 6.12 Time Based Pulse Input
Enables a choice between one of the four
ramps available, according to Table 6.7.
Same as Ramp bit 0.
1
0
0
1
1
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.
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.
This function makes it possible to give an
external fault to the drive. This fault is
Danfoss A/S © Rev. 2014-02-07 All rights reserved.
[55] DigiPot
increase
[56] DigiPot
decrease
[57] DigiPot Clear Clears the digital potentiometer reference
[60] Counter A
[61] Counter A
[62] Reset
Counter A
[63] Counter B
[64] Counter B
[65] Reset
Counter B
[70] Mech. Brake
Feedback
[71] Mech. Brake
Feedback
0
inv.
0
[72] PID error
1
inverse
0
1
[73] PID reset I-
part
[74] PID enable
[80] PTC Card 1
[91] Profidrive
OFF2
[92] Profidrive
OFF3
treated in the same way as an internally
generated alarm.
INCREASE signal to the digital potentiometer
function described in parameter group 3-9*
Digital Pot.Meter
DECREASE signal to the digital potenti-
ometer function described in parameter
group 3-9* Digital Pot.Meter
described in parameter group 3-9* Digital
Pot.Meter
(Terminal 29 or 33 only) Input for increment
counting in the SLC counter.
(Terminal 29 or 33 only) input for
decrement counting in the SLC counter.
Input for reset of counter A.
(Terminal 29 or 33 only) Input for increment
counting in the SLC counter.
(Terminal 29 or 33 only) Input for
decrement counting in the SLC counter.
Input for reset of counter B.
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.
Inverted brake feedback for hoisting
applications
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".
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".
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."
All digital inputs can be set to [80] PTC Card
1. However, only one digital input must be
set to this choice.
The functionality is the same as the control
word bit of the profibus/profinet option.
The functionality is the same as the control
word bit of the profibus/profinet option.
MG37A222