4.3.3-2 Acknowledgment Locations

Acknowledgment should be possible only from locations where the alarm message can be read.

Additional Information:
If alarm information is available at multiple VDUs, then operators should be capable of acknowledging the alarm from the VDU at which they are working. If alarm information is presented on a large control room overview display, operators should be able to acknowledge it from alarm control locations where it can be seen. This flexibility will minimize disruption caused by the alarm system interactions. It should not be possible to acknowledge alarms from locations where they cannot be read. If alarms can be acknowledged from multiple locations, then a means should be provided for ensuring that all operators for whom the alarm is important are aware that the alarm occurred. These means may include spoken, telephone, or computer-based communications between personnel.