70
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.
3.8 Parameter gr
oup 4
Function: (parameters 414 and 415):
If one of the "live zero" signals (e.g. 4-20 mA) has
been selected and the reference is less than 2 mA, a
warning (Ref. fault) shown in the display and a desired
operating state occurs after expiry of the time interval
chosen in parameter 414.
Description of choice: (parameters 414 and 415):
The desired operating mode is selected in parameter
415. The reference of the frequency converter can be
frozen at the given value, or it can regulate to stop,
the jogging frequency set in parameter 203, or the
maximum frequency set in parameter 202.
This function is not active for local speed reference
(par. 004), or when closed loop has been selected
(par. 101).
420 Reference type to H-O-A (EXT.HOA REF.)
Value:
★
Voltage
[0]
Current 60
[1]
Speed up/down (SPEED UP/DOWN)
[2]
Function:
When an external H-O-A is selected in parameter
003, a reference for hand-operation (Hand) must be
selected; this reference cannot be of the same type
that is used for remote control (Auto), see example 9
on page 32.
Description of choice:
If
Voltage
[0] is selected, an analogue voltage refe-
rence is used which is programmed in parameter 412
(terminal 53).
If
Current 60
[1] is selected, an analogue current refe-
rence is used which is programmed in parameter 413
(terminal 60).
If
Speed up/down
[2] is selected, digital speed up/
down is used which is programmed in parameter
406.
413 Terminal 60 Analogue input current
(INPUT #60 ANA.)
Value:
No operation (NO OPERATION)
[0]
★
0-20 mA (0-20 mA)
[1]
4-20 mA (4-20 mA)
[2]
20-0 mA (20-0 mA)
[3]
20-4 mA (20-4 mA)
[4]
Function (parameters 412 and 413):
There is a choice of different types of references.
Description of choice (parameters 412 and 413):
Enter the type of analogue input signals to terminals
53 and 60. Choose between voltage and current, and
whether the signals are to be normal or inverted. If
both inputs are used for reference signals, the total
reference signal is the sum of those two signals.
If a PID regulator is used without latched input being
used, terminal 17 (parameter 401), one of the inputs
must be used for the feedback signal.
If current control is used (par. 102), one of the inputs
must be used for setting a current limit. The choice of
these options prevents the use of the same type of
reference signal.
NB!:
NB!:
NB!:
NB!:
NB!:
If terminal 53 and/or 60 is not used, "no ope
ration" should be chosen in the respective
parameters 412 or 413, so a reference fault
does not occur.
414 Time interval (TIME OUT)
Value:
0 - 99 secs.
★
100 = OFF
Function:
See parameter 415.
415 Time interval function (TIME OUT ACT.)
Value:
★
Freeze (FREEZE)
[0]
Stop (STOP)
[1]
Jogging (JOG)
[2]
Max. speed (MAX)
[3]
All information about how to use the RS
All information about how to use the RS
All information about how to use the RS
All information about how to use the RS
All information about how to use the RS
485 serial interface is not included in this
485 serial interface is not included in this
485 serial interface is not included in this
485 serial interface is not included in this
485 serial interface is not included in this
manual. Please contact Danfoss for a De-
manual. Please contact Danfoss for a De-
manual. Please contact Danfoss for a De-
manual. Please contact Danfoss for a De-
manual. Please contact Danfoss for a De-
sign Guide.
sign Guide.
sign Guide.
sign Guide.
sign Guide.
500-517 Serial communication
