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2.8.3 Local (Hand On) and Remote (Auto On) Control
The frequency converter can be operated manually via the local control panel (LCP) or remotely via analog/digital inputs or serial bus.
If allowed in par. 0-40
[Hand on] Key on LCP, par. 0-41 [Off] Key on LCP, par. 0-42 [Auto on] Key on LCP, and par. 0-43 [Reset] Key on LCP, it is possible
to start and stop the frequency converter byLCP using the [Hand ON] and [Off] keys. Alarms can be reset via the [RESET] key. After pressing the [Hand
On] key, the frequency converter goes into Hand Mode and follows (as default) the Local reference set by using the LCP arrow keys up [
▲
] and down
[
▼
].
After pressing the [Auto On] key, the frequency 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 var-
ious serial 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 communica-
tion).
130BP046.10
Hand Off
Auto
LCP Keys
Reference Site
par. 3-13
Reference Site
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.
NB!
Local Reference will be restored at power-down.
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).
Automation VT Drive FC322 Design Guide
2 Introduction to VLT Automation VT Drive
MG.20.X1.22 - VLT
®
is a registered Danfoss trademark
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