Operating instructions

MM420 Parameter List 04/02
MICROMASTER 420 Parameter List
68 6SE6400-5BA00-0BP0
P1216 Holding brake release delay Min: 0.0
CStat: T Datatype: Float Unit: s Def: 1.0
P-Group: FUNC Active: first confirm QuickComm. No Max: 20.0
Defines period during which inverter runs at min. frequency P1080 before ramping up at point 1 (as shown
in P1215 - holding brake enable). Inverter starts at min. frequency P1080 on this profile, i.e. it does not use
a ramp.
Note:
A typical value of min. frequency P1080 for this type of application is the slip frequency of the motor.
You can calculate the rated slip frequency by using the following formula:
n
nsy
nnsy
Slip f
n
n n
P0310
100
r0330
[Hz]f ⋅
−
=⋅=
Notice:
If used to hold the motor at a certain frequency against a mechanical brake (i.e. you are using a relay to
control mechanical brake), it is important that min. frequency P1080 < 5 Hz; otherwise, the current drawn
may be too high and the relay may not open.
P1217 Holding time after ramp down Min: 0.0
CStat: T Datatype: Float Unit: s Def: 1.0
P-Group: FUNC Active: first confirm QuickComm. No Max: 20.0
Defines time for which inverter runs at minimum frequency (P1080) after ramping down at point 2.
Details:
See diagram P1215 (holding brake enable).
Level:
2
Level:
2