Category
Instrumentation & Control
Subcategory
Control System
Applicable standards
5
Issuing bodies
2
Description
DCS for continuous process plant control, alarm, supervision and historian.
Applicable Standards (5)
ISA — 3 standards
ANSI/ISA 101.01
Human Machine Interfaces for Process Automation Systems
HMI design philosophy, hierarchy and lifecycle for process automation.
ANSI/ISA 18.2
Management of Alarm Systems for the Process Industries
Alarm system lifecycle, philosophy, rationalization, KPIs.
Key requirements (6)
- Alarm management lifecycle.
- Alarm rationalization: every alarm has a defined cause, consequence, response, time to respond.
- Alarm rate target: ≤ 1 alarm/10 min steady state (≤ 6/hr) per operator.
- During upset: ≤ 10 alarms in first 10 minutes.
- Alarm priority distribution: ~80% low, ~15% medium, ~5% high (rough industry guideline).
- Suppress alarms in startup/shutdown/maintenance (state-based).
ANSI/ISA 5.1
Instrumentation Symbols and Identification
Symbols, tag numbers and conventions for P&IDs and instrument drawings.
IEC — 2 standards
IEC 61131 (series)
Programmable controllers
PLC hardware, programming languages (LD, FBD, ST, IL, SFC), communications.
IEC 62443 (series)
Industrial communication networks — Network and system security
OT/ICS cybersecurity — zones and conduits, security levels, secure development lifecycle.