REGEN.TEXT

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
REGEN.TEXT = (1.1)*(500 j)/(250 W) = 2.2 sec

General Information

Type

R/W Parameter

Units

Seconds

Range

0.1 to 1,200 Seconds

Default Value

100 Seconds

Data Type

Float

See Also

REGEN.WATTEXT, REGEN.REXT

Start Version

M_01-00-00-000

Variants Supported

Variant Supported
AKD Base Yes
AKD with Position Indexer Yes
AKD EtherCAT Yes
AKD CANopen Yes
AKD BASIC Yes
AKD SynqNet Yes*
AKD EtherNet/IP Yes
AKD PROFINET Yes
AKD Sercos® III Yes
AKD-N No
AKD-C Yes

*In SynqNet, a parameter may be available in the firmware but have no effect on the system. See SynqNet Supported Parameters.

Fieldbus Information

If your drive type is listed as supported but no index, address, or instance number is listed, then this parameter is accessible through WorkBench, but not over your fieldbus type. For information on SynqNet parameters see SynqNet Supported Parameters.

EtherCAT CoE and CANopen
Index/Subindex Object Start Version
3415h/0 M_01-00-00-000
PROFINET and Sercos® III
Fieldbus Address Attributes Signed?

PROFINET

2370 DWord No
Sercos® III 4 Octets
EtherNet/IP
Instance Data Size Data Type
371 4 Byte Float
Modbus
Register Address Is 64 bit? Attributes Signed? Object Start Version

740

No 32 bit No M_01-03-00-000

Related Topics

"Regeneration"