58
VLT
®
3500 HVAC
MG.35.B1.02 – VLT is a registered Danfoss trademark
★
= factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
3.7 Parameter gr
oup 3
311 Trip delay at inverter fault (TRIP DLY@FAULT)
Value:
0 - 35 secs.
★
Depends on unit
Function:
When the frequency converter registers an over- or
undervoltage for the set time, cutting out is then
effected.
Description of choice:
Select how long the frequency converter is to be able
to run at over- or undervoltage before tripping.
NB!:
NB!:
NB!:
NB!:
NB!:
If this value is reduced from the factory setting,
the unit may report a fault when the mains
supply comes on (undervoltage).
312 Maximum automatic restart time
(AUTO RESTART T)
Value:
0 - 10 secs.
★
5 secs.
Function:
The time from tripping until automatic reset can be set
if this option has been selected in parameter 309.
Description of choice:
The time between tripping and automatic reset is
selected.
313 Motor check (MOTOR CHECK)
Value:
★
Off (OFF)
[0]
On (ON)
[1]
Function:
VLT 3500 HVAC is able to check whether a motor has
been connected.
Description of choice:
If
On
[1] has been selected, check that a motor has
been connected when there is 24 V on terminal 27
and no start command has been given (START,
START.REV or JOG). If no motor has been connected,
NO MOTOR is displayed.
This function is not available in VLT 3575-3800 HVAC
and VLT 3542-3562 HVAC (230 V), from software ver-
sion 3.11 onwards.
309 Reset function (RESET MODE)
Value:
★
Manual reset (MANUAL)
[0]
Automatic reset (AUTOMATIC X 1)
[1]
Automatic reset (AUTOMATIC X 2)
[2]
Automatic reset (AUTOMATIC X 3)
[3]
Automatic reset (AUTOMATIC X 4)
[4]
Automatic reset (AUTOMATIC X 5)
[5]
Automatic reset (AUTOMATIC X 6)
[6]
Automatic reset (AUTOMATIC X 7)
[7]
Automatic reset (AUTOMATIC X 8)
[8]
Automatic reset (AUTOMATIC X 9)
[9]
Automatic reset (AUTOMATIC X 10)
[10]
Start disabled (START INHIBIT)
[11]
Function:
VLT 3500 HVAC can be programmed for automatic
resetting. Automatic resetting 1-10 times within 20
minutes can be selected. The time between each
reset is chosen in parameter 312.
Description of choice:
Manual reset
[0] can be opted out of via RS 485, ter-
minal 16, or from the operating panel.
Automatic reset
[1]: The number of resets, between 1
and 10, can be selected. If resetting fails, the frequen-
cy converter enters the TRIP Lock mode, which can
only be reset after cutting out the main suppy.
Start not possible
[11] disables restart after tripping.
Start not possible
[11] only works in connection with
serial communication, since restart is only possible via
the bus.
Start not possible
[11] enables the use of the
status table as in Profibus, when the control word is
ON1, ON2 or ON3. The status table is found in
Profibus literature MG.10.AX.0X.
The motor may start without warning.
310 Trip delay at current limit (TRIP [email protected])
Value:
0 - 60 secs. (OFF)
★
OFF
Function:
When the frequency converter registers that the out-
put current has exceeded the current limit I
LIM
(para-
meter 209) for the set time, cutting out is then
effected.
Description of choice:
Select how long the frequency converter is going to
be able to run at the current limit I
LIM
before tripping.
60 secs. = OFF means that the time is infinite.
