Danfoss VLT HVACDrive Instruction Manual page 74

Table of Contents

6 How to Operate the Adjustable Frequency

Drive

[Hand On]

enables control of the adjustable frequency drive via the GLCP. [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

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

NOTE!

External stop signals activated by means of control signals or a serial bus will override a "start" command via the LCP.

[Off]

stops the connected motor. The key can be selected as Enable [1] or Disable [0] via par. 0-41

and the [Off] key is inactive the motor can only 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

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

LCP

The parameter shortcut can be carried out by holding down the [Main Menu] key for 3 seconds. The parameter shortcut allows direct access to any

parameter.

6-6

[Hand on] Key on LCP

[Off] Key on LCP