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4. SAFETY OBSERVATION FUNCTION
4.5.6 SBC function
(1) Summary
Outputs a signal for an external brake control.
(2) Operation sequence
The following shows an operation sequence during an operation of SS1 and a return from STO state.
The configuration shows that the electromagnetic brake operates when SBCS (SBC output) is off. By
setting [Pr. PC02 Base circuit shut-off delay time] and [Pr. PSA03 SS1/SS2 monitoring deceleration
time] properly, the electromagnetic brake operates preventing dropping of vertical axis. Vertical axis
freefall prevention function is also available.
Servo motor speed
SS1C
(SS1 command)
Servo-on
(Controller or DI)
WNG (Warning)
Base circuit
(Energy supply to
the servo motor)
STOS
(STO output)
MBR
(Electromagnetic
brake interlock)
SBCS
(SBC output)
Electromagnetic
brake
Note. When the STO function shuts the power off, the dynamic brake will stop from start of the STO function until the electromagnetic
brake starts operating. Be aware that vertical axis may drop.
(3) Parameter setting
Set the parameter referring to section 4.3.3. Set parameters for the output devices referring to section
4.4.2.
POINT
Use SBCS (SBC output) for activating the electromagnetic brake. There is no
need to use MBR (Electromagnetic brake interlock).
Deceleration stop
0 r/min
ON (disabled)
OFF (enabled)
ON
OFF
ON
OFF
ON
OFF
ON
OFF (shut-off)
ON (disabled)
OFF (enabled)
ON (disabled)
OFF (enabled)
Release
Operation
Electromagnetic brake
operation delay time
SS1 in progress
STO status
SS1/SS2 monitoring
deceleration time
Model speed command 0 and equal
to or less than zero speed
Base circuit shut-off delay time
4 - 35
95 ms
Release delay time of
electromagnetic brake
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