8 Safety Function
8 - 4
G5-series Linear Motors/Servo Drives With Built-in EtherCAT Communications
This is a monitor output signal that is used to monitor the status of safety input signals using an external
device.
Connect the EDM output signal to the monitoring terminal on a safety device, such as a safety controller
or a safety sensor.
*1
This is not a safety output.
Normally when both safety inputs 1 and 2 are OFF, i.e., when the STO function is activated for both
safety input circuits, the EDM output is ON.
You can detect a failure of the safety input circuit and the EDM output circuit by monitoring all of the
following 4 signal states using an external device.
These are the two cases of errors:
•
Both safety inputs 1 and 2 are OFF, but the EDM output circuit signal does not turn ON.
•
Either or both safety inputs 1 and 2 are ON, but the EDM output circuit signal is ON.
The maximum delay time is 6 ms after the safety input signal is input until the EDM output signal is
output.
8-1-2
External Device Monitor (EDM) Output Signal
Signal
name
Symbol
Pin No.
Description
Control mode
Position
Speed
Force
EDM
output
*1
EDM+
CN8-8
Monitor signal is output to detect malfunctioning
of the safety function.
3
3
3
EDM–
CN8-7
3
3
3
8-1-3
Relationship Between Safety Input Signals and EDM Output Signal
Signal name
Symbol
Signal status
Safety input 1
SF1
ON
ON
OFF
OFF
Safety input 2
SF2
ON
OFF
ON
OFF
EDM output
EDM
OFF
OFF
OFF
ON
