Danfoss VLT HVAC Series, Programming Manual, Page: 12 / 338

Operation Keys
Keys for local control are found at the bottom of the control panel.
130BP046.10
Figure 2.5: Operation keys of the numerical CP (NLCP)
[Hand on] enables control of the adjustable frequency drive via the LCP. [Hand on] also starts the motor and it is now possible to enter the motor speed
data by means of the arrow keys. The key can be selected as
Enable
[1] or
Disable
[0] via par.0-40
[Hand on] Key on LCP
.
External stop signals activated by means of control signals or a serial bus will override a 'start' command via the LCP.
The following control signals will still be active when [Hand on] is activated:
• [Hand on] - [Off] - [Auto on]
• Reset
• Coasting stop inverse
• Reversing
• Set-up select lsb - Set-up select msb
• Stop command from serial communication
• Quick stop
• DC brake
[Off] stops the connected motor. The key can be selected as Enable [1] or Disable [0] via par.0-41 [Off] Key on LCP .
If no external stop function is selected and the [Off] key is inactive, the motor can be stopped by disconnecting the line power supply.
[Auto on] enables the adjustable frequency drive to be controlled via the control terminals and/or serial communication. When a start signal is applied
on the control terminals and/or the bus, the adjustable frequency drive will start. The key can be selected as
Enable
[1] or
Disable
[0] via par.0-42
[Auto
on] Key on LCP
.
NOTE!
An active HAND-OFF-AUTO signal via the digital inputs has higher priority than the control keys [Hand on] [Auto on].
[Reset] is used for resetting the adjustable frequency drive after an alarm (trip). It can be selected as Enable [1] or Disable [0] via par.0-43 [Reset] Key
on LCP .
2 How to Program VLT ® HVAC Drive Programming Guide
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MG.11.C6.22 - VLT ® is a registered Danfoss trademark
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