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8
-3
8 Safety Function
G5 Series AC Servo Drives With Built-in EtherCAT Communications, Linear Motor Type
8
-1
Saf
e
T
o
rq
ue O
F
F
Fu
nct
ion
8
8-1
-1 Saf
ety Input Signals
There are 2 safety input circuits to operate the STO function.
•
When safety input 1 or 2 turns
“
OFF,
”
the STO function will start operating within 5 ms of the input,
and the motor output torque will be reduced to 0.
•
Connect the equipment so that the safety input circuit is turned OFF to operate the STO function.
•
Set the operation when the safety input turns
“
OFF
”
in the Fault reaction option code (605E hex).
Precautions for Correct Use
Precautions for Correct Use
L pulses for self-diagnosis of safety equipment
When you are connecting a safety device, such as a safety controller or a safety sensor, the
safety output signal of the device may include L pulses for self-diagnosis. To avoid
malfunction due to the L pulses for self-diagnosis, a filter that removes the L pulses is built
into the safety input circuit. If the OFF time of the safety input signal is 1 ms or less, the
safety input circuit does not recognize it as
“
OFF.
”
To make sure that
“
OFF
”
is recognized,
maintain the OFF status of safety input signal for at least 5 ms.
8
-1-1
Safety Input Signals
Signal
name
Symbol
Pin
number
Description
Control mode
Position
Speed
Force
Safety
input 1
SF
CN8-4
The upper arm drive signal of the power
transistor inside the Servo Drive is cut
off.
SF
CN8-3
Safety
input 2
SF2
CN8-6
The lower arm drive signal of the power
transistor inside the Servo Drive is cut
off.
SF2
CN8-5
For self-diagnosis L
pulse
Within 1 ms
Within 5 ms
Normal operation
STO status
Safety input signal
Servo Drive
operation
5 ms or more