YASKAWA G7 Series - Drive Protection

Drive Protection
6-67
Drive Protection
This section explains the functions for protecting the Drive and the braking resistor.
 Performing Overheating Protection on Mounted Braking Resistors
Perform overheating protection on Drive-mounted braking resistors (Model: ERF-150WJ ).
When overheating in a mounted braking resistor is detected, an alarm RH (Mounted braking resistor overheat-
ing) is displayed on the Digital Operator, and the motor coasts to a stop.
Related Parameters
Multi-function Contact Outputs (H2-01 to H2-05)
Parameter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
L8-01
Internal
Dynamic
Braking
Resistor
Protection
Selection
Selects the DB protection only
when using 3% duty cycle
heatsink mount Yaskawa braking
resistor. This parameter does not
enable or disable the DB
function of the Drive.
0: Not Provided
1: Provided
0 to 1 0 NoAAAAA
DB Resistor
Prot
Setting
Value
Function
Control Methods
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
D Braking resistor fault (ON: Resistor overheat or braking transistor fault) Yes Yes Yes Yes Yes
INFO
The most likely causes of RH (Mounted braking resistor overheating) being detected are that the deceleration
time is too short or that the motor regeneration energy is too large. In these cases, lengthen the deceleration
time or replace the Braking Resistor Unit with one with a higher breaking capacity.
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