Bosch PIN8 N1 Anleitung zur Fehlerbehebung PDF herunterladen (Seite 302)

100

101

6-90 Drive Control MPH-02, MPB-02, MPD-02

DOK-INDRV*-MP*-02VRS**-FK01-EN-P

The reference values for the switch-on/switch-off threshold can be set to

fixed standard values or variable values in parameter P-0-0860, Control

word of power section.

See also Parameter Description "P-0-0860, Control word of power

section"

For the switch-on or switch-off threshold of the braking resistor in the

case of supply units of the HMV type there is

• for HMV01.1E-... a fixed or a mains voltage dependent reference

value, depending on the signal level at the HMV terminal X32/3,

• for HMV01.1R-... a fixed reference value for the switch-on threshold of

DC820V

- and -

• dynamic adjustment to the current load of the braking resistor.

Note: Explanations on the reference values for the switch-on/switch-

off thresholds of the braking resistor and on the control of X32

are contained in the documentation of the supply units of

type HMV (DOK-INDRV*-HMV-*******-AW01-...).

As parameterization is impossible for the supply modules, the customer in

this case only has a limited choice.

Regenerative supply unit HMV01.1R: The basic switch-on threshold of the

braking resistor is 820 V. There always is dynamic adjustment to the

active load.

Infeeding supply unit HMV01.1E: Via an interface input the customer can

choose between mains-oriented threshold and fixed threshold. Default

(open-circuited interface) is mains-oriented. The basic switch-on

threshold then is 80 V above the mains voltage crest value measured at

the first power on. In the "fixed threshold" mode the basic switch-on

threshold is 820 V. In both operating modes there always is dynamic

adjustment to the active load.

The dynamic adjustment to the current load is advantageous for:

• protecting the braking resistor from overload and

• equal load of all braking resistors active in a common DC bus.

The current load of the braking resistor is displayed in parameter

P-0-0844, Braking resistor load.

Depending on the load the switch-on threshold of the braking resistor is

increased:

• with load 0% ... 80% → linear increase, starting from reference value,

to reference value +15 V

• with load 80% ... 100% → linear increase, starting from reference

value +15 V, to reference value +30 V

The currently effective switch-on threshold is displayed in parameter

P-0-0833, Braking resistor threshold.

Note: In the case of a braking resistor load of 100%, the switch-on

threshold is not increased any more because braking takes

priority over the protection of the device!

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