5. Page 4Classification: Restricted
What is database ? How does SCADA Work
Process
DB
Event DB
Controller
connect
MODBUS /
OPC
S
E
R
V
E
R
S
Symphony Plus
- Interface Node
OPC /
Web
Srvr
Process
DB
Event
DB
Controller
Connect
MODBUS /
OPC
SCADA INTERFACE NODE y Plus
- Interface Node
HISTORIAN HISTORIAN
Red. Historian / SAN Servers
S
E
R
V
E
R
S
Process
DB
Process
DB
Event
DB
SCADA INTERFACE
DMZ Firewall
Recording
/ Historian
15. Page 14Classification: Restricted
Alarms- EEMUA Standards ; ISA 18.2
Very clear alarm system performance KPIs.
Alarm Philosophy
what must be included in table format..
Alarm System requirements specification.
Identification and rationalization.
Implementation, operation, and maintenance.
Monitoring and assessment, management of change, and auditing.
Less examples are given.
Complementary to EEMUA 191.