Parameter Group 5: Digital In/Out - Danfoss FC 51 Series Programming Manual

Parameter Descriptions

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
[1] Reset
[2 ] Coast Inverse
[3] Coast and
reset inv.
[4] Quick stop
inverse
[5] DC-brake inv.
[6] Stop inv.
[8] Start
[9] Latched start
[10] Reversing
[11] Start
reversing
[12] Enable start
forward
28
®
VLT
The frequency converter will not react to
signals transmitted to the terminal.
Reset the frequency converter after a Trip/
Alarm. Not all alarms can be reset.
Coasting stop, inverted input (NC). The
frequency converter leaves the motor in free
mode.
Reset and coasting stop inverted input (NC).
The frequency converter resets and leaves
the motor in free mode.
Inverted input (NC). Generates a stop in
accordance with the quick-stop ramp time
set in 3-81 Quick Stop Ramp Time. When
motor stops, shaft is in free mode.
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.
Stop inverted function. Generates stop
function when selected terminal goes from
logical level "1" to "0". Stop is performed
according to selected ramp time.
Select start for a start/stop command.
1 = Start, 0 = stop.
Motor starts if a pulse is applied for min. 2
ms. Motor stops when Stop inverse is
activated.
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.
Use for start/stop and for reversing at the
same time. Signals on start [8] are not
allowed at the same time.
0 = stop, 1 = start reversing.
Use if motor shaft must rotate clockwise at
start.
MG02C602 - VLT
Micro Drive FC 51 Programming Guide
[13] Enable start
reverse
[14] Jog
[16] Preset
reference bit
0
[17] Preset
reference bit
1
[18] Preset
reference bit
2
[19] Freeze
reference
[20] Freeze output Freeze the actual motor frequency (Hz). The
[21] Speed up
[22] Speed down
[23] Setup select
bit 0
[26] Precise stop
inverse (only
terminal 33)
[27] Start, precise
stop (only
terminal 33)
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Use if motor shaft must rotate counter-
clockwise at start.
Use for activating jog speed. See 3-11 Jog
Speed.
Preset reference bit 0, 1 and 2 enables a
choice between one of the eight preset
references according to below.
Same as preset reference bit 0 [16], see 3-10
Preset Reference.
Same as preset reference bit 0 [16].
Freeze actual reference. The frozen 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.
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].
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.
Same as Speed-up [21].
Set 0-10 Active set-up to Multi set-up.
Logic 0 = set up 1, Logic 1 = Set up 2.
Prolong the stop signal to give a precise
stop independent of scan time. The function
is available for terminal 33 only.
As [26], but including Start.