Danfoss VLT CDS 303, Operating Instructions Manual

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Digital input function Select Terminal
Ramp bit 0 [34] All
Ramp bit 1 [35] All
Mains failure inverse [36] All
Day/night control [39] All
DigiPot Increase [55] All
DigiPot Decrease [56] All
DigiPot Clear [57] All
Counter A (up) [60] 29, 33
Counter A (down) [61] 29, 33
Reset Counter A [62] All
Counter B (up) [63] 29, 33
Counter B (down) [64] 29, 33
Reset Counter B [65] All
Lead pump start [120] All
Lead pump alternation [121] All
Comp. 1 Interlock [130] All
Comp. 2 Interlock [131] All
Comp. 3 Interlock [132] All
Comp. 1 Inv. interlock [139] All
Comp. 2 Inv. interlock [140] All
Comp. 3 Inv. interlock [141] All
Table 6.4 Overview of Digital Inputs
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 the
terminal.
[1] Reset Resets frequency converter after a TRIP/ALARM.
Not all alarms can be reset.
[2] Coast
inverse (Default Digital input 27): Coasting stop,
inverted input (NC). The frequency converter
leaves the motor in free mode. Logic ‘0’
⇒
coasting stop.
[3] Coast and
reset
inverse Reset and coasting stop Inverted input (NC).
Leaves motor in free mode and resets
frequency converter. Logic ‘0’
⇒
coasting stop
and reset.
[4] Quick stop
inverse Inverted input (NC). Generates a stop in
accordance with quick-stop ramp time set in
parameter 3-81 Quick Stop Ramp Time . When
motor stops, the shaft is in free mode. Logic ‘0’
⇒
Quick-stop.
[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
parameter 2-01 DC
Brake Current to parameter 2-03 DC Brake Cut In
Speed [RPM] . The function is only active when
the value in parameter 2-02 DC Braking Time 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
(
parameter 3-42 Ramp 1 Ramp Down Time ,
parameter 3-52 Ramp 2 Ramp Down Time ,
parameter 3-62 Ramp 3 Ramp down Time ,
parameter 3-72 Ramp 4 Ramp Down Time ).
NOTICE!
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
[27]
Torque limit & stop and connect this
digital output to a digital input that is
configured as coast.
[8] Start (Default Digital input 18): Select start for a
start/stop command. Logic ‘1’ = start, logic ‘0’
= stop.
[9] Latched
start The motor starts, if a pulse is applied for min.
2 ms. The motor stops when Stop inverse is
activated.
[10] Reversing (Default Digital input 19). Change the direction
of motor shaft rotation. Select Logic ‘1’ to
Parameter Descriptions Operating Instructions
MG34M422 Danfoss A/S © Rev. 2013-07-03 All rights reserved. 63
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