Is there any document explaining how to connect the process alarms to an external speaker by DO ? I want to generate audible alarm only in control room. All other remote control rooms no alarm sound. 800xA version is 184.108.40.206.
Have you looked at using the External Alarm Aspect. It is used with Alarm List to set the output Properties which could drive a External Device/relay Horn. This would be the Standard setup for your Scenario.
Have you considered to use the "Audible Alarm Workplace Configuration" and "Audible Alarm Sound Configuration" aspects in combination with different Workplaces (for the specific control room users)? This solution requires a sound device on one or more of the operator stations in the control room. The External alarm requires i digital output on a AC800M controller (or PLC Connect I/O) in the vicinity of the control room.