Issue 01/06 | Parameter Description |
P1080[3] Min. frequency |
|
| Min: | 0.00 | |
CStat: | CUT | Datatype: Float | Unit: Hz | Def: | 0.00 |
SETPOINT | Active: Immediately | QuickComm.: Yes | Max: | 650.00 |
Level
1
Sets minimum motor frequency [Hz] at which motor will run irrespective of frequency setpoint.
The minimum frequency P1080 represents a masking frequency of 0 Hz for all frequency target value sources (e.g. ADC, MOP, FF, USS), with the exception of the JOG target value source (analogous to P1091). Thus the frequency band +/- P1080 is run through in optimum time by means of the acceleration/deceleration ramps. Dwelling in the frequency band is not possible (see example).
Furthermore, an undershoot of the actual frequency f_act below min. frequency P1080 is output by the following signal function.
Index:
P1080[0] : 1st. Drive data set (DDS)
P1080[1] : 2nd. Drive data set (DDS)
P1080[2] : 3rd. Drive data set (DDS)
Example:
ON/OFF
1
0 | t |
f_set
P1080
t
| f_act |
|
P1080 + P2150 |
| |
P1080 |
| |
|
| t |
| ||
| ||
f_act > f_min |
| |
r0053 | 1 | P2153 = 0 |
Bit 02 | 0 | t |
Note:
Value set here is valid both for clockwise and for anticlockwise rotation.
Under certain conditions (e.g. ramping, current limiting), motor can run below minimum frequency.
MICROMASTER 440 | Parameter List |
127 |