Danfoss VLT HVAC Series Programming Manual page 62

3 Parameter Description
3.5.4 3-5* Ramp 2
Choosing ramp parameters, see 3-4*.
3-51 Ramp 2 Ramp-up Time
Range:
10.00 s* [1.00 - 3600.00 s]
3
3-52 Ramp 2 Ramp-down Time
Range:
20.00 s* [1.00 - 3600.00 s]
3.5.5 3-8* Other Ramps
Configure parameters for special ramps such as jog or quick stop, for example.
3-80 Jog Ramp Time
Range:
20.00 s* [1.00 - 3600.00 s]
3-38
Function:
Enter the ramp-up time, i.e., the acceleration time from 0 RPM to par.1-25
Choose a ramp-up time such that the output current does not exceed the current limit in par.
Current Limit
4-18 during ramping. See ramp-down time in par.3-52
tacc nnorm par
×
par
. 3 − 51 =
ref rpm
Function:
Enter the ramp-down time, i.e., the deceleration time from par.1-25
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
Current Limit
par.4-18 . See ramp-up time in par.3-51
tdec nnorm par
×
par
.3 − 52 =
ref rpm
Function:
Enter the jog ramp time, i.e., the acceleration/deceleration time between 0 RPM and the rated motor
speed (n ) (set in par.1-25 Motor Nominal Speed
M,N
quired for the given jog ramp time does not exceed the current limit in par.4-18
jog ramp time starts upon activation of a jog signal via the control panel, a selected digital input,
or the serial communication port.
tjog × nnorm par
par . 3 − 80 =
jog speed par . 3 − 19
MG.11.C6.22 - VLT ® is a registered Danfoss trademark
VLT ® HVAC Drive Programming Guide
Ramp 2 Ramp-down Time
. 1 − 25
s
Motor Nominal Speed
Ramp 2 Ramp-up Time
. 1 − 25
s
). Ensure that the resultant output current re-
. 1 − 25
s
Motor Nominal Speed
.
.
to 0 RPM.
.
Current Limit . The