Using Intelligent Output Terminals
Oper
ations
a
nd Moni
tor
ing
4–54
Brake Control
Signals
The Brake Control function enables the inverter to control external braking systems with a
particular safety characteristic. The brake release logic convention is such that an open circuit
fault (such as loose wire) causes the external brake to engage. A complete discussion of the
operation of brake control is in
“External Brake Control Function” on page 4–32
. The diagram
below shows the signals that are important to the External Brake Control function.
Expansion Card
Output Signals
Other outputs listed below require expansion card SJ-FB Encoder Feedback board. Please see
the SJ-FB manual for more information.
Opt. Code
and
Symbol
19=[BRK]
20=[BER]
Valid for
Outputs
[11 to [15],
[ALx]
Required
Settings
B120, B121,
B122, B123,
B124, B125,
B126
Default
terminals
Requires
config.
Symbol
Function Name
Input
State
Description
BRK
Brake Release
ON
when the inverter signals the external brake
system to release (open) its brake
OFF
when the inverter is not driving the motor, and
needs the external brake engaged
BER
Brake Error
ON
when the output current is less than the set
releasing current
OFF
when the brake function is not in use, or when
the output current to the motor is correct and
it is safe to release the brake
[BRK] Brake release
[BOK] Brake confirmation
Inverter
Brake System
Emergency Brake
[BER] Brake error
Opt. Code
and
Symbol
21=[ZS]
22=[DSE]
23=[POK]
Valid for
Outputs
[11 to [15],
[ALx]
Required
Settings
C061
Default
terminals
Requires
config.
Opt.
Code
Symbol
Function Name
Description
21
ZS
Zero Speed Detect signal
Signal indicates the encoder pulses of the
motor have stopped
22
DSE
Speed Deviation Excessive
Velocity error exceeds the error threshold
defined by parameter P026
23
POK
Positioning Completion
Indicates the load position is at the target