After pressing the [Auto On] key, the frequen-
cy converter goes into Auto mode and follows
(as default) the Remote reference. In this
mode, it is possible to control the frequency
converter via the digital inputs and various se-
rial interfaces (RS-485, USB, or an optional
fieldbus). See more about starting, stopping,
changing ramps and parameter set-ups etc. in
par. group 5-1* (digital inputs) or par. group
8-5* (serial communication).
130BP046.10
Active Reference and Configuration
Mode
The active reference can be either the local
reference or the remote reference.
In par. 3-13
Reference Site
the local reference
can be permanently selected by selecting
Lo-
cal
[2].
To permanently select the remote reference
select
Remote
[1]. By selecting
Linked to
Hand/Auto
[0] (default) the reference site will
depend on which mode is active. (Hand Mode
or Auto Mode).
Hand Off
Auto
LCP Keys
Reference Site
Par. 3-13
Active Reference
Hand
Linked to Hand / Auto
Local
Hand -> Off
Linked to Hand / Auto
Local
Auto
Linked to Hand / Auto
Remote
Auto -> Off
Linked to Hand / Auto
Remote
All keys
Local
Local
All keys
Remote
Remote
The table shows under which conditions either the Local reference or the Remote reference is
active. One of them is always active, but both can not be active at the same time.
Par. 1-00
Configuration Mode
determines what kind of application control principle (i.e. Open Loop
or Closed loop) is used when the Remote reference is active (see table above for the conditions).
Reference Handling
Local Reference
VLT
®
HVAC Drive Design Guide
2. Introduction to VLT HVAC Drive
MG.11.B2.02 - VLT
®
is a registered Danfoss trademark
29
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