Emergency Shutdown Systems (ESD)
ESD system ensures priority control of process equipment which is required for switching the process in safe mode. The system performs the following functions:
- Collection and processing of ESD-connected information about process parameters and equipment state
Detection and alarm of emergencies and process deviations from preset limits
Automatic shutdown of production facilities (or separate piece of equipment) in case of parameters deviation from preset limits or manual shutdown by operator
Alarms and notifications management
Prevention of repeated start of production facilities (or separate piece of equipment) until the cause of shutdown is eliminated or forced unlocking is performed
ESD system can be developed both as a technically separate system which is integrated into DCS at the middle level of control and as a system functionally integrated into DCS at the lower control level.