I/O Signal Specifications - Omron OMNUC G5 Series User Manual

I/O Signal Specifications

Safety Input Signals
There are 2 safety input circuits to operate the STO function.
Signal
Symbol
name
Safety
SF+
input 1
SF−
Safety
SF2+
input 2
SF2−
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
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.
Safety input signal
Servo Drive operation
OMNUC G5-series AC Servomotors and Servo Drives User's Manual (with Built-in EtherCAT Communications)
Pin
Description
number
CN8-4 • The upper arm drive signal of
the power transistor inside the
Servo Drive is cut off.
CN8-3
CN8-6
• The lower arm drive signal of
the power transistor inside the
CN8-5 Servo Drive is cut off.
For self-diagnosis
Within 1 ms
Normal operation
8-1 Safe Torque OFF Function
Posi-
tion
√
√
√
√
L pulse
5 ms or more
Within 5 ms
STO status
Control mode
Fully-
Speed Torque
closed
√ √ √
√ √ √
√ √ √
√ √ √
8-2
8