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6. Setting Parameters
70
Festo P.BE-CMMP-CO-SW-EN 0708NH
Sub-index
10
h
Description
enable_logic
Data Type
UINT16
Access
rw
PDO Mapping
no
Units
--
Value Range
0 … 2
Default Value
2
Value
Meaning
0
Digital inputs final stage controller enable
1
Digital inputs final stage controller RS232
2
Digital inputs final stage controller CAN
Object 6510
h
_ 30
h
: pwm_frequency
The switching losses of the final stage are proportional to the switching frequency of the
power transistors. Halving the normal PWM frequency makes it possible to take somewhat
more power out of some devices of the CMMP family. But this increases the current ripple
caused by the final stage. This switchover is only possible when the final stage is switched
off.
Sub-index
30
h
Description
pwm_frequency
Data Type
UINT16
Access
rw
PDO Mapping
no
Units
--
Value Range
0, 1
Default Value
0
Value
Meaning
0
Normal final stage frequency
1
Half final stage frequency
Object 6510
h
_ 3A
h
: enable_enhanced_modulation
The object
enable_enhanced_modulation
can activate the extended sinus modulation. It
permits better use of the intermediate circuit voltage and thus about 14 % higher speeds.
A disadvantage in certain applications is that the regulating action and smooth running of
the motor are a little worse at very low speeds. Write access is only possible when the
final stage is switched off. To adopt the change, the parameter set must be secured and a
reset performed.
Содержание CMMP Series
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