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

VLT Micro Drive FC 51

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
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
[13] Enable start reverse
[14] Jog
[16] Preset ref bit 0
[17] Preset ref bit 1
[18] Preset ref bit 2
[19] Freeze reference
[20] Freeze output
[21] Speed up
[22] Speed down
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 par. 3-81. 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
par. 2-01. Function is only active when value in par. 2-02 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 Both directions [2] in par. 4.10.
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.
Use if motor shaft must rotate counterclockwise at start.
Use for activating jog speed. See par. 3-11.
Preset ref bit 0, 1 and 2 enables a choice between one of the eight preset references according to the table
below.
Same as preset ref bit 0 [16], see par. 3-10.
Same as preset ref 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 (par. 3-51 and 3-52) in the range
Minimum Reference
par. 3-02 - par. 3-03
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
Motor Speed Low Limit
the range par. 4-12,
NB!
When freeze output is active, the frequency converter cannot be stopped via a low
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 par. 3-51.
Same as Speed up [21].
MG.02.C4.02 - VLT is a registered Danfoss trademark
4. Parameter Descriptions
Maximum Reference
.
Motor Speed High Limit
- par. 4-14, .
4
Start
[8]
33