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7-3
7-1 Safe Torque OFF (STO) Function
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
7
Safety 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 equipment, such as a Safety Controller or a safety sensor, to the external
device monitoring terminal.
Relationship Between Safety Input Signal and EDM Output Signal
When safety inputs 1 and 2 are both OFF (where the STO function is operating for safety inputs
for the 2 circuits), the EDM output circuit is turned ON.
You can detect a failure of the safety input circuit and the EDM output circuit by monitoring all
of the following 4 signal statuses using an external device.
The maximum delay time is 6 ms after the safety input signal is input and until the EDM output
signal is output.
Signal name
Symbol
Pin
number
Description
CONTROL mode
Position Speed Torque
Full
closing
EDM output
EDM
+
CN8-8
• Monitor signal is output to detect
malfunctioning of the safety
function.
* This output signal is not a safety
output.
√
√
√
√
EDM
−
CN8-7
√
√
√
√
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
Содержание OMNUC G5
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