Regen.text - Kollmorgen AKD Series Benutzerhandbuch

AKD Benutzerhandbuch | 25.33.4 REGEN.TEXT

25.33.4 REGEN.TEXT

General Information
Type
Description
Units
Range
Default
Value
Data Type
See Also
Start Version M_01-00-00-000
Variants Supported
AKD BASIC
AKD SynqNet
AKD EtherNet/IP
Fieldbus Information
Fieldbus
EtherCAT COE and CAN-
open
Fieldbus Index/Subindex Is 64 bit? Attributes Signed? Object Start Version
Modbus 740
Description
REGEN.TEXT is the time-to-fault when input power steps from 0 to 150% of REGEN.WATTEXT.
REGEN.TEXT sets the thermal time constant of the algorithm used to protect the regeneration resistor
from overheating and failing. The drive's regen resistor protection algorithm continuously calculates the
power dissipated in the resistor and processes that power value through a single pole low pass filter to
model the regen resistor's thermal inertia. When the filtered regen power on the output of the filter
(REGEN.POWERFILTERED) exceeds REGEN.WATTEXT, a fault occurs. REGEN.TEXT sets the time
constant of this thermal inertial filter = (REGEN.TEXT/1.1).
REGEN.TEXT can often be found directly on power resistor data sheets. On the data sheet find the peak
overload curve and then find the safe allowed time to be at 150% of the regen resistor's continuous power
rating. Set REGEN.TEXT to this value in seconds. Another way regen resistor peak overload capability is
often specified is by giving the energy rating in joules of the resistor. If you have the energy rating joule
limit E then:
REGEN.TEXT = (1.1)*((E in joules)/REGEN.WATTEXT)
Example
The external regen resistor is rated for 250 W continuous, is 33 ohm, and has a joule rating of 500 joules.
To use this resistor, the drive settings become:
REGEN.TYPE = -1 (External Regen)
REGEN.REXT = 33
REGEN.WATTEXT = 250
R/W Parameter
Sets the external regen resistor thermal protection time con-
stant.
Seconds
0.1 to 1,200 Seconds
100 Seconds
Float
REGEN.WATTEXT (s: 903), REGEN.REXT (s: 899)
Variant Supported
Index/Subindex Object Start Version
3415h/0
No 32 bit
√
√
√
M_01-00-00-000
No M_01-03-00-000
KOLLMORGEN | Mai 2013 900