Operating instructions

04/02 1 Parameters
MICROMASTER 420 Parameter List
6SE6400-5BA00-0BP0
71
P1236 Compound braking current
Min: 0
CStat: CUT Datatype: U16 Unit: % Def: 0
P-Group: FUNC Active: Immediately QuickComm. No Max: 250
Defines DC level superimposed on AC waveform after OFF1 / OFF3 command. The value is entered in [%]
relative to rated motor current (P0305).
Compound braking switch-on level
P0210213.1V21.13 mains ⋅⋅=⋅⋅=
If P1254 = 0 :
otherwise :
1242r0.98 ⋅=
Compound braking switch-on level
Value:
P1236 = 0 :
Compound braking disabled.
P1236 = 1 - 250 :
Level of DC braking current defined as a [%] of rated motor current (P0305).
Dependency:
Compound braking depends on the DC link voltage only (see threshold above). This will happen on OFF1,
OFF3 and any regenerative condition.
It is disabled, when:
- DC braking is active
- Flying start is active
Notice:
Increasing the value will generally improve braking performance; however, if you set the value too high, an
overcurrent trip may result.
If used with dynamic brake enabled as well compound braking will take priority.
If used with the Vdc max controller enabled the drive behaviour whilst braking may be worsened paticularly
with high values of compound braking.
P1240 Configuration of Vdc controller Min: 0
CStat: CT Datatype: U16 Unit: - Def: 1
P-Group: FUNC Active: Immediately QuickComm. No Max: 1
Enables / disables Vdc controller.
The Vdc controller dynamically controls the DC link voltage to prevent overvoltage trips on high inertia
systems.
Possible Settings:
0 Vdc controller disabled
1 Vdc-max controller enabled
Note:
Vdc max controller automatically increases ramp-down times to keep the DC-link voltage (r0026) within
limits (P2172).
r1242 CO: Switch-on level of Vdc-max Min: -
Datatype: Float Unit: V Def: -
P-Group: FUNC Max: -
Displays switch-on level of Vdc max controller. The formula is only valid if auto detection is not activated
(P1254=0).
Following equation is only valid, if P1254 = 0 :
0210P215.1V21.15 = r1242 mains ⋅⋅⋅⋅ =
P1243 Dynamic factor of Vdc-max Min: 10
CStat: CUT Datatype: U16 Unit: % Def: 100
P-Group: FUNC Active: Immediately QuickComm. No Max: 200
Defines dynamic factor for DC link controller in [%].
Dependency:
P1243 = 100 % means parameters P1250, P1251 and P1252 (gain, integration time and differential time)
are used as set. Otherwise, these are multiplied by P1243 (dynamic factor of Vdc-max).
Note:
Vdc controller adjustment is calculated automatically from motor and inverter data.
P1250 Gain of Vdc-controller Min: 0.00
CStat: CUT Datatype: Float Unit: - Def: 1.00
P-Group: FUNC Active: Immediately QuickComm. No Max: 10.00
Enters gain for Vdc controller.
Level:
2
Level:
3
Level:
3
Level:
3
Level:
4