Summa Series Servodrive Product Manual
STO
Document Version: V1.01
(Dec, 2019)
© 2019 ESTUN Automation Co., Ltd. All right reserved.
11-9
11.4.3
S-RDY (Servo Ready Output) Signal
When the Drive is in Safe State, S-RDY (Servo Ready Output) signal is OFF.
When the HWBB1 and the HWBB2 signals are turned ON, and the Servo is OFF, the S-RDY signal will
be turned ON, and the Drive will be in Ready State.
ON
OFF
HWBB1
HWBB2
State
ON
S-ON
S-RDY
RDY
RUN
SAF
RDY
OFF
ON
OFF
ON
OFF
ON
11.4.4
/BK (Brake Ouput) Signal
If the STO function takes effect when the HWBB1 or HWBB2 signal is OFF, the /BK (Brake) signal will
turn OFF. At that time, the setting in Pn506 (Brake Reference-Servo OFF Delay Time) will be disabled.
ON
OFF
HWBB1
HWBB2
State
RUN
SAF
/BK
ON
(Brake released)
OFF
(Brake applied)
OFF
(Power not supplied)
ON
(Power supplied)
Motor Power
11.4.5
Stopping Methods
The Drive will enter the safe state when the STO function takes effect, and the Motor will stop according
to the setting of Pn003.0.
Parameter Setting
Stopping Method
Statue after Stopping
When Enabled
Pn003.0
0
Dynamic Brake
Coasting
After restart
1
Dynamic Brake
Dynamic Brake
2
Coasting
Coasting
