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8 Safety Function
8
-4
G5 Series AC Servo Drives With Built-in EtherCAT Communications, Linear Motor Type
This is a monitor output signal that is used to monitor the status of safety input signals using an external
device. Connect a safety device, such as a safety controller or a safety sensor. Connect the EDM output
signal to the monitoring terminal on a safety device.
*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 number
Description
Control mode
Position
Speed
Force
EDM output
*1
EDM
CN8-8
Monitor signal is output to
detect malfunctioning of the
safety function.
EDM
CN8-7
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