41
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
003 Local/remote control (LOCAL / REMOTE)
Value:
★
Use keypad (KEYPAD HOA)
[0]
Use keypad w/ext. stop (LOC/EXT STOP)
[1]
Extern H-O-A [EXT H-O-A]
[2]
Function:
There is a choice of three different Local/remote
control modes for controlling VLT 3500 HVAC:
Use
keypad, use keypad w/external stop and External H-
O-A. External H-O-A
is used in cases where externally
from the frequency converter a control feature is to be
used which allows switching between "Hand" (manual
operation) and "Auto" (control via general control
system).
If
External H-O-A
is chosen, the "Local Hand" key
cannot be used directly on the control panel of the
frequency converter.
Description of choice:
If
Use keypad
[0] is selected, the speed can be con-
trolled directly on the control panel of the frequency
converter by activating the "Local/Hand" key. The
"Stop" key is active on the control panel of the fre-
quency converter, unless it has been disregarded in
parameter 007. When shifting between "Local/Hand"
and "Remote/Auto", a possible local speed reference
will not be saved.
If
Use keypad w/ext. stop
[1] is selected, the frequen-
cy converter can be stopped by breaking the con-
nection between terminal 12 (24 V DC) and terminal
27 (Q-stop). Terminal 27 (Q-stop) must be program-
med for
Coast stop
[0] or
Reset and Coast stop
[3] in
parameter 404.
If
External H-O-A
[2] is selected, shifting is possible
between "Hand" (manual operation) and "Auto"
(control from general control system) via the control
terminals of the frequency converter, as programmed
in parameters 400-403. "Latch Start Hand" is
programmed in parameter 403 or 405. The reference
type for "Hand" control is selected in parameter 420.
004 Local reference (LOCAL SPEED)
Value:
0.00 - f
MAX
Function:
A Local reference can be programmed in parameter
004. If the programmed Local reference is to be ac-
tive, the "Local/Hand" key must have been activated.
When shifting between "Local/Hand" and "Remote/
Auto", the local speed reference will be retained.
Description of choice:
The speed can be set directly in Hz. The set value is
saved after 20 seconds. The setting is saved and is
also active after a mains drop-out.
In this parameter Data Mode is not left automatically.
The Local reference cannot be controlled via RS 485.
Data changes in parameter 004 are blocked if para-
meter 010 is programmed as DISABLE.
The motor may start without warning if pa-
rameter 014 is changed to Auto restart [0].
005 User read-out (VALUE AT MAX)
Value:
1-9999
★
100
Function:
By choosing the DISPLAY/FEEDBACK function in Dis-
play Mode, a user read-out can be obtained which is
a scaling of the reference sum if "Open loop" has
been selected in parameter 101.
The unit to be used can be chosen in parameter 117.
Description of choice:
The programmed value will be displayed when the
output frequency is equal to f
MAX
(parameter 202).
006 Local reset (LOCAL RESET)
Value:
Not possible (DISABLE)
[0]
★
Possible (ENABLE)
[1]
007 Local stop (LOCAL STOP)
Value:
Not possible (DISABLE)
[0]
★
Possible (ENABLE)
[1]
008 Local/Hand (KEY LOCAL/HAND)
Value:
Not possible (DISABLE)
[0]
★
Possible (ENABLE)
[1]
3.4 Parameter gr
oup 0
★
= factory setting. Text in ( ) = display text. Figures in [ ] are used when communicating with the bus.
