Omron R88D-KTA5L User Manual page 432

7-1 Safe Torque OFF (STO) Function
External Device Monitor (EDM) Output Signal
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.
Signal name
EDM output
Relationship Between Safety Input Signals and EDM Output Signal
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.
Errors occur in the following two cases:
7  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.
Safety input 1
Safety input 2
EDM output
 The maximum delay time is 6 ms after the safety input signal is input until the EDM output signal
is output.
7-3
Symbol
number
EDM+ CN8-8
EDM− CN8-7
Signal name Symbol
SF1 ON
SF2 ON
EDM OFF
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
Pin
Description
• A monitor signal is output to
detect a safety function failure.
* This is not a safety output.
Signal status
ON OFF
OFF ON
OFF OFF
Control mode
Position Speed Torque
√ √ √
√ √ √
OFF
OFF
ON
Fully-
closed
√
√