Where could I get the “signal controller” with RobotStudio?
Please tell me the sequence to open it,
Is it opened with RobotStudio → Controller → Remote-IRB-Controller → Configuration → I/O System → Configuration ?
You will need to use the system output emergency stop - this is configured as you describe above.
Add the digital output signal (can be a virtual signal), then add the system output using this signal - see screen grab - where the signal I created was called E_Stop.