59
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
★
= factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
315 Motor thermal protection
(MOTOR THERMAL)
Value:
Off (PROTECT-OFF)
[0]
Warning 1 (WARNING 1)
[1]
★
Trip 1 (TRIP 1)
[2]
Warning 2 (WARNING 2)
[3]
Trip 2 (TRIP 2)
[4]
Warning 3 (WARNING 3)
[5]
Trip 3 (TRIP 3)
[6]
Warning 4 (WARNING 4)
[7]
Trip 4 (TRIP 4)
[8]
Function:
The frequency converter calculates whether the motor
temperature may exceed the permissible limits. The
calculation is based on 1.16 x rated motor current (set
in parameter 107).
Four separate calculations are possible. One calcula-
tion can be chosen for each set-up, or the same
calculation can be used in several set-ups.
Warning 1 and Trip 1 refer to motor settings in set-up
1. Also for warnings 2-4 and trips 2-4 reference is
made to set-up numbers.
With the options above, it is possible to monitor the
same motor in several set-ups, or up to four different
motors can be monitored.
Description of choice:
Select
Off
(OFF) if no warning or trip is required.
Only
select
Warning
if a warning is to come up on the
display when a motor is overloaded.
The frequency converter can also be programmed to
ensure that a warning signal is given via the signal
outputs (parameters 407- 410).
Select
Trip
if tripping is required when the motor is
overloaded.
The frequency converter can also be programmed to
give an alarm signal via the signal outputs (para-
meters 407-410).
314 Motor pre-heat (MOTOR PRE-HEAT)
Value:
★
Off (OFF)
[0]
On (ON)
[1]
Function:
The pre-heat function can be activated to counteract
moisture in the motor.
Description of choice:
If
On
[1] has been selected, the motor is pre-heated
by means of direct current (approx. half the start volt-
age) when there is 24 V on terminal 27 and no start
command has been given (START, START.REV or
JOG).
This function is not available in VLT 3575-3800 HVAC
and VLT 3542-3562 HVAC (230 V), from software
version 3.11 onwards.
3.7 Parameter gr
oup 3
316 Relay ON delay (RELAY ON DELAY)
Value:
0.00 - 10.00 secs.
★
0.00 sec.
Function:
Relay output 01, which is connected to terminals 01-
02-03 (parameter 409) can be programmed for relay
on/off delay.
Description of choice:
The setting in parameters 316 and 317 effects the
relay on/off delay for relay output 01, which has
outputs on terminals 01-02-03.
317 Relay OFF delay (RELAY OFF DELAY)
Value:
0.00 - 10.00 secs.
★
0.00 sec.
Function:
See function under parameter 316.
Description of choice:
See description of choice under parameter 316.
