Parameter Group 5: Digital In/Out - Danfoss VLT Micro Drive FC 51 Programming Manual

Parameter Descriptions
VLT

4.6 Parameter Group 5: Digital In/Out

4.6.1 5-** Digital In/Out
The following describes all digital input command
functions and signals.
4.6.2 5-1* Digital Inputs
4 4
Parameters for configuring the functions for the input
terminals.
The digital inputs are used for selecting various functions
in the frequency converter. All digital inputs can be set to
the following:
[0] No Operation The frequency converter will not react to
signals transmitted to the terminal.
[1] Reset Reset the frequency converter after a Trip/
Alarm. Not all alarms can be reset.
[2 ] Coast Inverse Coasting stop, inverted input (NC). The
frequency converter leaves the motor in free
mode.
[3] Coast and Reset and coasting stop inverted input (NC).
reset inv. The frequency converter resets and leaves
the motor in free mode.
[4] Quick stop Inverted input (NC). Generates a stop in
inverse accordance with the quick-stop ramp time
set in 3-81 Quick Stop Ramp Time. When
motor stops, shaft is in free mode.
[5] DC-brake inv. Inverted input for DC braking (NC). Stops
motor by energizing it with DC current for a
certain time period, see 2-01 DC Brake
Current. Function is only active when value
in 2-02 DC-Braking Time is different from 0.
[6] Stop inv. Stop inverted function. Generates stop
function when selected terminal goes from
logical level "1" to "0". Stop is performed
according to selected ramp time.
[8] Start Select start for a start/stop command.
1 = Start, 0 = stop.
[9] Latched start Motor starts if a pulse is applied for min. 2
ms. Motor stops when Stop inverse is
activated.
[10] Reversing Change direction of motor shaft rotation.
Reversing signal only changes direction of
rotation; it does not activate start function.
Select [2] Both directions in 4.10 Motor Speed
Direction.
0 = normal, 1 = reversing.
[11] Start Use for start/stop and for reversing at the
reversing same time. Signals on start [8] are not
allowed at the same time.
0 = stop, 1 = start reversing.
[12] Enable start Use if motor shaft must rotate clockwise at
forward start.
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Micro Drive FC 51 Programming Guide
[13] Enable start Use if motor shaft must rotate counter-
reverse clockwise at start.
[14] Jog Use for activating jog speed. See 3-11 Jog
Speed.
[16] Preset Preset reference bit 0, 1 and 2 enables a
reference bit choice between one of the eight preset
0 references according to below.
[17] Preset Same as preset reference bit 0 [16], see 3-10
reference bit Preset Reference.
1
[18] Preset Same as preset reference bit 0 [16].
reference bit
2
[19] Freeze Freeze actual reference. The frozen reference
reference is now the point of enable/condition for
Speed up and Speed down to be used. If
Speed up/down is used, speed change
always follows ramp 2 (3-51 Ramp2 Ramp-up
Time and 3-52 Ramp2 Ramp-down Time) in
the range 3-02 Minimum Reference - 3-03
Maximum Reference.
[20] Freeze output Freeze the actual motor frequency (Hz). The
frozen motor frequency is now the point of
enable/condition for Speed up and Speed
down to be used. If Speed up/down is used,
the speed change always follows ramp 2 in
the range 4-12 Motor Speed Low Limit - 4-14
Motor Speed High Limit.
NOTE
When freeze output is active, the
frequency converter cannot be stopped
via a low [8] Start signal. Stop the
frequency converter via a terminal
programmed for Coasting Inverse [2] or
Coast and reset, inverse [3].
[21] Speed up Select Speed up and Speed down if digital
control of the up/down speed is desired
(motor potentiometer). Activate this function
by selecting either Freeze reference or
Freeze output. When Speed-up is activated
for less than 400 ms. the resulting reference
will be increased by 0.1%. If Speed-up is
activated for more than 400 ms. the
resulting reference will ramp according to
ramp 2 in 3-51 Ramp2 Ramp-up Time.
[22] Speed down Same as Speed-up [21].
[23] Setup select Set 0-10 Active set-up to Multi set-up.
bit 0 Logic 0 = set up 1, Logic 1 = Set up 2.
[26] Precise stop Prolong the stop signal to give a precise
inverse (only stop independent of scan time. The function
terminal 33) is available for terminal 33 only.
[27] Start, precise As [26], but including Start.
stop (only
terminal 33)
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