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STE Soft Starter
User’s Manual
32
6.5
Digital Input
The STE Soft Starter has 4 digital inputs opto-isolated to 12Vdc.
You can activate the inputs with the internal supply (Terminal 4) or with an external source for example
the PLC.
6.5.1
Start/Stop (Terminal 17 and 18)
The start command active the relative digital output (terminal 13 and 14) connected to the main
contactor, if no alarm occurs, the STE Soft Starter give an output and the motor begin to turn.
The Stop command stop the STE Soft Starter and the output will return at zero following the mode set in
the parameter P033
-@/@
(see par. 9) When the motor is at speed zero the contact at the terminals 13
and 14 will be reopened and the main contactor goes down.
•
Normal Start/Stop Control
Normally Run and Stop are controlled by two
different logic inputs:
a start is obtained with pulse (0 to 1) on the START
Push Button, and a stop is obtained on opening the
STOP Input with pulse (1 to 0) on the STOP Push
Button.
On power-up or a manual fault reset or after a stop
command, the motor can only be powered by a
new pulse (0 to 1) on the START Push Button
4
12Vdc
+
-
5
17
18
Stop Start
•
Alternative Start/Stop Control
Otherwise you can use only one logic input to
control Run and Stop.
On power-up or a manual fault reset the motor will
restart if the START-STOP command is present
(state 1).
This is a typical use with a PLC
4
12Vdc
+
-
5
17
18
Start-Stop
6.5.2
Configurable Input 3 (Terminal 19)
This digital input is configured by the parameter P088
=:
and could perform different functions:
•
Immediate Stop:
The STE Soft Starter, to work, must not have this digital input active.
When the unit is in Run and you active the digital input, the unit will be stopped and the output
goes at zero without follow the ramp. The contact at the terminals 13 and 14 will be immediately
reopened and the main contactor goes down.
•
External Alarm: (default)
The STE Soft Starter, to work, must not have this digital input active.
When the unit is in Run and you active the External Alarm, the unit will be stopped and the output
goes at zero without follow the ramp. The contact at the terminals 13 and 14 will be immediately
reopened and the main contactor goes down. The External Alarm activates also the Critical Alarm
digital output.(see. parameter P090
= :
and P091
= :
)
•
Reset Alarm:
The Reset Alarm is used for restore the unit after an alarm occurs.
Before using this input you must resolve the fault or the alarm status come back.
Summary of Contents for STE Series
Page 1: ...USER S MANUAL Rev 01 2007 STE Enhanced Soft Starter ...
Page 2: ......
