Danfoss VLT AutomationDrive FC 302, Programming Manual, Page: 103 / 346

[30] Counter
input
Precise stop function in parameter 1-83 Precise
Stop Function acts as counter stop or speed
compensated counter stop with or without
reset. The counter value must be set in
parameter 1-84 Precise Stop Counter Value .
[31] Pulse
edge
triggered
Counts the number of pulse flanks per sample
time. This gives a higher resolution at high
frequencies, but is not as precise at lower
frequencies. Use this pulse principle for
encoders with low resolution (for example 30
PPR).
Pulse
Sample time
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Illustration 3.35 Pulse Flanks per Sample
Time
[32] Pulse
time-
based
Measures the duration between pulse flanks.
This gives a higher resolution at lower
frequencies, but is not as precise at higher
frequencies. This principle has a cutoff
frequency, which makes it unsuited for encoders
with low resolutions (for example 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
Read Timer:
20 timer tides
Read Timer:
20 timer tides
Time Start
Time counter
Sample time
Timer
Pulse
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Illustration 3.36 Duration Between Pulse
Flanks
[34] Ramp bit
0
Enables a selection between 1 of the 4 ramps
available, according to
Table 3.18 .
[35] Ramp bit
1
Same as [34] 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 3.18 Preset Ramp Bit
[40] Latched
Precise Start A latched precise start only requires a pulse
of 3 ms on terminals 18 or 19.
When using for parameter 1-83 Precise Stop
Function [1] Cnt stop with reset or [2] Cnt stop
w/o reset :
When the reference is reached, the
frequency converter internally enables the
precise stop signal. This means that the
frequency converter does the precise stop
when the counter value of
parameter 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
parameter 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 frequency converter.
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 potentiometer
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
parameter 1-01 Motor Control Principle to [3]
Flux w/ motor feedback ; set
parameter 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, this option inverts the
resulting error from the process PID
controller. Available only if
parameter 1-00 Configuration Mode is set to
[6] Surface Winder , [7] Extended PID Speed OL ,
or [8] Extended PID Speed CL .
[73] PID reset I-
part When enabled, this option resets the I-part
of the process PID controller. Equivalent to
parameter 7-40 Process PID I-part Reset .
Parameter Descriptions Programming Guide
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