63
VLT
®
3500 HVAC
MG.35.B1.02 – VLT is a registered Danfoss trademark
Section 1Section 1Section 1Section 1Section 1
Section 2Section 2Section 2Section 2Section 2
Section 3Section 3Section 3Section 3Section 3
Section 4Section 4Section 4Section 4Section 4
External H-O-A Auto
[3]:
Selected if the H-O-A function is to be used externally
from the frequency converter for switching between
hand-operation (Hand) and the normal remote control
(Auto). By energizing 24 V DC from terminal 12 to ter-
minal 17, the normal remote control mode is activa-
ted, and normal control via the control terminals
of the frequency converter is possible.
403 Terminal 19 reversing (INPUT 19)
Value:
★
Reversing (REVERSING)
[0]
Start reversing (START REV)
[1]
No operation (NO OPERATION)
[2]
External H-O-A Hand (EXT. HOA HAND)
[3]
Latch start Hand (LATCH ST.HAND)
[4]
Function:
This parameter (terminal 19) is used i.a. for changing
the direction of rotation of the motor.
Description of choice:
Reversing
[0]:
Chosen if an option is to be available to change the
direction of rotation of the motor. No signal on termi-
nal 19 will give normal rotation.
24 V DC from terminal 12 on terminal 19 leads to
reversing.
The motor is only able to start if together with a signal
on terminal 19 a start command is given (e.g. on ter-
minal 18).
Start with reversing
[1], parameter 402,
Start
[0]:
Selected if start and reversing are to be activated at
the same input.
★
= factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
3.8 Parameter gr
oup 4
402 Terminal 18 start (INPUT 18)
Value:
★
Start (START)
[0]
Latch start (LATCH START)
[1]
No operation (NO OPERATION)
[2]
External H-O-A Auto (EXT. HOA AUTO)
[3]
Function:
Used for choosing between different possible functions
of terminal 18. Start and stop will be effected in accor-
dance with the ramp times selected in parameters 215
and 216.
Description of choice:
Start
[0]:
Selected if a start/stop function is desired. Logic
"1" = start, logic "0" = stop.
Latch start
[1]:
Chosen if a start and stop function is desired for 2
different inputs (can be used together with terminal
16, 17 or 27).
A 24 V DC pulse from terminal 12 ("1" for min. 20
msec.) on terminal 18 will start the motor.
A pulse where 24 V DC from terminal 12 is removed
("0" for min. 20 msec.) from terminal 16, 17 or 27 will
stop the motor.
No operation
[2]:
Selected if the frequency converter is not to react to
signals coming to terminal 18.
If serial communication is used, the input status can
be read and used by the master.
