Danfoss VLT HVAC Series

3-19 Jog Speed [RPM]
Range: Function:
300. RPM* [0 - par. 4-13 RPM] Enter a value for the jog speed n
JOG
, which is a fixed output speed. The adjustable frequency drive
runs at this speed when the jog function is activated. The maximum limit is defined in par. .
See also par.3-80
Jog Ramp Time .
3.5.3 3-4* Ramp 1
Configure the ramp parameter, ramping times, for each of the two ramps (par. 3-4* and par. 3-5*).
3-41 Ramp 1 Ramp-up Time
Range: Function:
10.00 s* [1.00 - 3600.00 s] Enter the ramp-up time, i.e., the acceleration time from 0 RPM to par.1-25 Motor Nominal Speed .
Choose a ramp-up time such that the output current does not exceed the current limit in par.
4-18
Current Limit during ramping. See ramp-down time in par.3-42 Ramp 1 Ramp-down Time .
par .3 − 41 =
tacc × nnorm par .1 − 25
ref rpm
s
3-42 Ramp 1 Ramp-down Time
Range: Function:
20.00 s* [1.00 - 3600.00 s] Enter the ramp-down time, i.e., the deceleration time from par.1-25 Motor Nominal Speed to 0 RPM.
Choose a ramp-down time such that no overvoltage arises in the inverter due to regenerative op-
eration of the motor, and such that the generated current does not exceed the current limit set in
par.4-18
Current Limit . See ramp-up time in par.3-41 Ramp 1 Ramp-up Time .
par .3 − 42 =
tdec × nnorm par .1 − 25
ref rpm
s
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C6.22 - VLT
®
is a registered Danfoss trademark 3-37
3