Brake Control Signals; Expansion Card Output Signals - Hitachi SJ300 Series Instruction Manual

4–58
Using Intelligent Output Terminals
Brake Control
Signals
Expansion Card
Output Signals
The Brake Control function enables the inverter to control external braking systems with a
particular safety characteristic. A complete discussion of the operation of brake control is in
"External Brake Control Function" on page
describe the configuration of the outputs [BRK] Brake Release and [BER] Brake Error.
Inverter
Opt.
Symbol Function Name
Code
19 BRK Brake Release
20 BER Brake Error
11, 12, 13, 14, 15,
Valid for
AL0 – AL2
outputs:
B120, B121, B122, B123,
Required
B124, B125, B126
settings:
Notes:
• The brake release logic convention is such that
an open circuit fault (such as loose wire)
causes the external brake to engage.
Other outputs listed below require expansion card SJ-FB Encoder Feedback board. Please see
the SJ-FB manual for more information.
Opt.
Symbol Function Name
Code
21 ZS Zero Speed Detect signal
22 DSE Speed Deviation Excessive
23 POK Positioning Completion
4–39. The block diagram and table that follow
[BRK] Brake release
[BOK] Brake confirmation
[BER] Brake error
Output
State
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
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
Example: (Requires output configuration—
see page 3–53.)
Inverter output
terminal circuit
See I/O specs on
page 4–9.
RY
Signal indicates the encoder pulses of the
motor have stopped
Velocity error exceeds the error threshold
defined by parameter P026
Indicates the load position is at the target
Brake System
Emergency Brake
Description
BRK
BER
14 13 11
CM2
15 12
+
RY
–
Description