VLT® 7000 Booster
■ Inputs and outputs 300-328
In this parameter group, the functions that
relate to the input and output terminals of the
frequency converter are defined.
The digital inputs (terminals 16, 17, 18, 19, 27, 29,
32 and 33) are programmed in parameters 300-307.
The table below gives the options for programming the
inputs. The digital inputs require a signal of 0 or 24 V
DC. A signal lower than 5 V DC is a logic ‘0’,while
asignalhigherthan10VDCisalogic‘1’.
The terminals for the digital inputs can be connected
to the internal 24 V DC supply, or an external 24
V DC supply can be connected.
The drawings in the next column show one Setup
using the internal 24 V DC supply and one Setup
using an external 24 V DC supply.
Switch 4, which is located
on the Dip switch control
card, is used for separating
the common potential of the
internal 24 V DC supply from
the common potential of the external 24 V DC
supply.
See Electrical installation.
Please note that when Switch 4 is in the OFF
position, the external 24 V DC supply is galvanically
isolated from the frequency converter.
Digital inputs Terminal no. 16 17 18 19 27 29 32 33
parameter 300 301 302 303 304 305 306 307
Value:
No function (NO OPERATION) [0] [0] [0] [0] [0]✭ [0]✭
Reset (RESET) [1]✭ [1] [1] [1]
Coasting stop, inverse (COAST INVERSE) [0]✭
Start (START) [1]✭
Hand start (HAND START) [11] [15] [11] [12]
System start (SYSTEM START) [20]
Function:
In parameters 300-307 Digital inputs it is possible to
choose between the different possible functions related
to the digital inputs (terminals 16-33). The functional
options are given in the table on the previous page.
Description of choice:
No function is selected if the frequency converter is
not to react to signals transmitted to the terminal.
Reset the frequency converter after an alarm; however,
trip locked alarms cannot be reset by cycling mains
power supply. See table in List of warn ings an d alarms
. Reset will occur on the rising edge of the signal.
Coasting stop, inverse is used to force the frequency
converter to "release" the motor immediately (the
output transistors are "turned off") to make it coast
freely to stop. Logic ‘0’ implements coasting to stop.
Start is selected if a start/stop command is required.
Logic ‘1’ = start, logic ‘0’ =stop.
Hand start is selected if the frequency converter is
to be controlled by means of an external hand/off
or H-O-A switch. A logic ‘1’ (Hand start active) will
mean that the frequency converter starts the motor.
A logic ‘0’ means that the connected motor stops.
The frequency converter will then be in OFF/STOP
mode, unless there is an active Auto start signal.
See also the description in Local control.
NB!:
An active Hand and Auto signal via the digital
inputs will have higher priority tha
nthe[HAND
START]-[AUTO START] control keys.
Please refer to section Cascad e Controller Settings for
further information on Start/Stop functionality.
✭ = factory setting. () = display text [] = value for use in communication via serial communication port
MG.70.A1.02 - VLT is a registered Danfoss trademark
68
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