Omron R88D-KN series User Manual

8-3
8 Safety Function
G5 Series AC Servo Drives With Built-in EtherCAT Communications, Linear Motor Type
8-1 Safe Torque OFF Function
8
8-1-1 Safety 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 UsePrecautions 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 sel
f
-diagnosis L pulse
Within 1 ms
Within 5 ms
Normal operation
STO status
Safety input signal
Servo Drive
operation
5 ms or more

Omron R88D-KN series Specifications

General

Brand	Omron
Model	R88D-KN series
Category	Controller
Language	English