68
XtrapulsPac – User Guide
Chapter 3 - Reference
Sub Index
3
Description
Continuous measurement of the current
Data Type
Unsigned16
Access ro
PDO Mapping
No
Unit
0x7FFF = drive max. current (0x6510)
Default Value
No
3.2.1.2.4 - Braking resistor Protection
Braking resistor duty cycle limit
Index 0x33B0
Name
Braking resistor duty cycle limit
Description
This parameter allows the protection of the braking resistor against overheating and
failure.
This parameter is valid only for the drive operation in standalone mode (AC mains
connection without GDPS).
Object Code
ARRAY
Number of Elements
2
Value Description
Sub Index
1
Name
Braking system operation
Description
The braking system operation is selected according to the drive configuration
on the X9 connector.
- When the External resistor operation is selected, the duty cycle value is
limited at 70 per thousand. This means a maximum braking transistor
conduction of 70 ms over a period of 1 second.
- When the Internal resistor operation is selected, the duty cycle value is limited at 25
per thousand. This means a maximum braking transistor conductionof 25 ms over a
period of 1 second. This selection allows protecting the drive internal 35 W braking
resistor against overheating and failure.
Data Type
Unsigned16
Object Class
All
Access rw
PDO Mapping
No
Value Range
0 = External braking resistor
1 = Internal braking resistor
Default Value
0
Sub Index
2
Name
Duty cycle limit
Description
The braking resistor duty cycle limit parameter allows limiting the external braking
resistor average power in order to protect it against overheating and failure. This
parameter value is calculated according to the braking resistor specifications as
described below:
Duty cycle limit = Braking resistor rated power (W) x Braking resistor ohmic value
(Ohms) / Braking on threshold (V) / Braking on threshold (V)
Data Type
Unsigned16
Object Class
All
Access rw
PDO Mapping
No
Value Range
0-70 for external braking resistor selection (see 0x33B0-1)
0-25 for internal braking resistor selection (see 0x33B0-1)
Unit
o
/
oo
Default Value
70