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Option
Function
[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
e3
0b
b4
63
.1
0
Illustration 6: 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.
Spee d [rpm]
Spee d [rpm]
Time[sec]
Time[sec]
a
b
e3
0b
b4
62
.1
0
Read Timer:
20 timer tides
Read Timer:
20 timer tides
Time Start
Time counter
Sample time
Timer
Pulse
e3
0b
b4
64
.1
0
Illustration 8: Duration Between Pulse Flanks
[34]
Ramp bit 0
Enables a selection between 1 of the 4 ramps available, according to
[35]
Ramp bit 1
Same as
[34] Ramp bit 0
.
Table 13: Preset Ramp Bit
Preset ramp bit
1
0
Ramp 1
0
0
Ramp 2
0
1
Ramp 3
1
0
Ramp 4
1
1
Table 14: 5-10 Digital Inputs - 4
Option
Function
[40]
Latched pre-
cise 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
drive internally enables the precise stop signal. This means that the drive does the precise stop when the
counter value of
parameter 1-84 Precise Stop Counter Value
is reached.
[41]
Latched pre-
cise stop in-
verse
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.
Parameter Setup
Operating Guide | VLT® Extended Relay Card MCB 113
AQ322553864968en-000101 / 130R0353| 21
Danfoss A/S © 2020.01