AKD EtherCAT | 5 Appendix
5.3.47 Object 345Ah: Brake Control
These objects implement the possibility to control the brake directly, overriding the drive
logic. When the brake state is controlled by the fieldbus, the drive state (enabled, disabled,
faulted) will have no effect on the brake - the fieldbus will be in control.
Applying or releasing the brake at the wrong time can be a safety hazard and can destroy
your mechanic as well as drive or motor. Unexpected behaviour might be possible. It is the
responsibility of the customer using this mode to use this function appropriately.
When fieldbus control is disabled, the drive will control the brake as defined by existing AKD
brake related parameters. As soon as fieldbus control is enabled, the Brake Command
received over the field bus will take effect. So, if the Brake Command is set to APPLY and
the current state is RELEASE, the brake will begin to apply .
The default value of the fieldbus control will be disabled, so that the drive is always in control
until the fieldbus is operational. It is recommended that this bit remain 0 except for special
operating conditions where the fieldbus will control the brake. When fieldbus communication
is lost, the drive will regain control of the brake if the fieldbus had previously taken control.
Enable Field-
bus Control
Serious Failur
econdition
present
Brake Com-
mand
Fieldbus Con-
trol Status
Controlled
by...
Final
Brake
State
0
x
x
0
Drive
Drive
1*
no
0
1
Fieldbus
Applied
1*
no
1
1
Fieldbus
Released
x
yes
any
0
Drive
Drive
1* indicates that a rising edge was seen since the last time the drive applied the brake
Index
345Ah
Name
Brake Control
Object code
ARRAY
Data type
UNSIGNED16
Category
optional
Defined sub-indices
Subindex
0
Name
highest sub-index supported
Data type
UNSIGNED8
Category
mandatory
Access
R/O
PDO Mapping
not possible
Value Range
2
Default Value
2
126
Kollmorgen | kdn.kollmorgen.com | October 2017
