Preset Ramp Bit - Danfoss VLT AutomationDrive FC 302 Programming Manual

Parameter Descriptions
[30] Counter Precise stop function in parameter 1-83 Precise
input 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 Counts the number of pulse flanks per sample
edge time. This gives a higher resolution at high
triggered 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
Illustration 3.35 Pulse Flanks per Sample
Time
[32] Pulse Measures the duration between pulse flanks.
time- This gives a higher resolution at lower
based 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]
a Time[sec]
a: Low encoder
resolution
Pulse
Timer
Sample time
Time counter
Time Start
Illustration 3.36 Duration Between Pulse
Flanks
[34] Ramp bit Enables a selection between 1 of the 4 ramps
0 available, according to Table 3.18.
[35] Ramp bit Same as [34] Ramp bit 0.
1

Preset ramp bit

Ramp 1
Ramp 2
Ramp 3
Ramp 4
Table 3.18 Preset Ramp Bit
[40] Latched A latched precise start only requires a pulse
Precise Start of 3 ms on terminals 18 or 19.
MG33MP02
Programming Guide
Speed [rpm]
b Time[sec]
b: Standard encoder
resolution
Read Timer: Read Timer:
20 timer tides 20 timer tides
1 0
0 0
0 1
1 0
1 1
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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 Sends a latched stop signal when the precise
Precise Stop stop function is activated in
inverse parameter 1-83 Precise Stop Function. The
latched precise stop inverse function is
available for terminals 18 or 19.
[51] External This function makes it possible to give an
interlock external fault to the frequency converter.
This fault is treated in the same way as an
internally generated alarm.
[55] DigiPot Increase signal to the digital potentiometer
Increase function described in parameter group 3-9*
Digital Pot. Meter.
[56] DigiPot Decrease signal to the digital potentiometer
Decrease function described in parameter group 3-9*
Digital Pot. Meter.
[57] DigiPot Clears the digital potentiometer reference
Clear 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 Input for reset of counter A.
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 Input for reset of counter B.
Counter B
[70] Mech. Brake Brake feedback for hoisting applications: Set
Feedback 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 Inverted brake feedback for hoisting
Feedback applications.
inv.
[72] PID error When enabled, this option inverts the
inverse 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- When enabled, this option resets the I-part
part of the process PID controller. Equivalent to
parameter 7-40 Process PID I-part Reset.
3 3
101