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!
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
▪
www.cmafh.com