Reset Counter B [65] All
Sleep Mode [66] All
Reset Maintenance Word [78] All
Lead Pump Start [120] All
Lead Pump Alternation [121] All
Pump 1 Interlock [130] All
Pump 2 Interlock [131] All
Pump 3 Interlock [132] All
3.7.4. Digital Inputs, 5-1* continued
All = Terminals 18, 19, 27, 29, 32, X30/2, X30/3, X30/4. X30/ are the terminals on MCB 101.
Functions dedicated to only one digital input are stated in the associated parameter.
All digital inputs can be programmed to these functions:
[0] No operation No reaction to signals transmitted to terminal.
[1] Reset Resets frequency converter after a TRIP/ALARM. Not all alarms can be reset.
[2] Coast inverse Leaves motor in free mode. Logic ‘0’ => coasting stop.
(Default Digital input 27): Coasting stop, inverted input (NC).
[3] Coast and reset inverse Reset and coasting stop Inverted input (NC).
Leaves motor in free mode and resets the frequency converter. Logic ‘0’ => coasting stop and reset.
[5] DC-brake inverse Inverted input for DC braking (NC).
Stops motor by energizing it with a DC current for a certain time period. See par. 2-01 to par. 2-03. The function
is only active when the value in par. 2-02 is different from 0. Logic ’0’ => DC braking.
[6] Stop inverse Stop Inverted function. Generates a stop function when the selected terminal goes from logical level ‘1’ to ‘0’.
The stop is performed according to the selected ramp time (par. 3-42, par. 3-52, par. 3-62, par. 3-72).
NB!
When the frequency converter is at the torque limit and has received a stop command, it may
not stop by itself. To ensure that the frequency converter stops, configure a digital output to
Torque limit & stop
[27] and connect this digital output to a digital input that is configured
as coast.
[7] External Interlock Same function as Coasting stop, inverse, but External Interlock generates the alarm message ’external fault’ on
the display when the terminal which is programmed for Coast Inverse is logic ‘0’. The alarm message will also
be active via digital outputs and relay outputs, if programmed for External Interlock. The alarm can be reset
using a digital input or the [RESET] key if the cause for the External Interlock has been removed. A delay can
be programmed in par. 22-00, External Interlock Time. After applying a signal to the input, the reaction described
above will be delayed with the time set in par. 22-00.
[8] Start Select start for a start/stop command. Logic ‘1’ = start, logic ‘0’ = stop.
(Default Digital input 18)
[9] Latched start Motor starts, if a pulse is applied for min. 2 ms. Motor stops when Stop inverse is activated
[10] Reversing Changes direction of motor shaft rotation. Select Logic ‘1’ to reverse. The reversing signal only changes the
direction of rotation. It does not activate the start function. Select both directions in par. 4-10
Motor Speed
Direction
.
(Default Digital input 19).
[11] Start reversing Used for start/stop and for reversing on the same wire. Signals on start are not allowed at the same time.
[14] Jog Used for activating jog speed. See par. 3-11.
(Default Digital input 29)
[15] Preset reference on Used for shifting between external reference and preset reference. It is assumed that
External/preset
[1] has
been selected in par. 3-04. Logic '0' = external reference active; logic '1' = one of the eight preset references
is active.
[16] Preset ref bit 0 Enables a choice between one of the eight preset references according to the table below.
[17] Preset ref bit 1 Enables a choice between one of the eight preset references according to the table below.
[18] Preset ref bit 2 Enables a choice between one of the eight preset references according to the table below.
3. Parameter Description VLT
®
HVAC Drive Programming Guide
66
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
3
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