300+ SCADA Protocol Articles & Guides
Deep dives on Modbus, DNP3, IEC 60870-5-101/104, IEC 61850, OPC UA, Profinet, MQTT, IEC 62443, and substation automation — written for practicing engineers.
ICCP vs IEC 61850: Two MMS Protocols, Two Jobs
ICCP vs IEC 61850 compared: why both run MMS on port 102, how their data models differ, control and reporting differences, and where the two meet in a utility.
ICCP Object Models: Indication Points and Control Points
ICCP object models from IEC 60870-6-802: the four point types, quality and validity flags, timestamps, the one-byte state encoding, SBO attributes, and tagging.
ICCP Operations and Services: The Complete TASE.2 Map
ICCP operations mapped to MMS services both directions: every TASE.2 operation and action, the variable names that disambiguate them, and the error codes that matter.
ICCP Device Control: SBO Select and Operate Explained
ICCP device control step by step: the SBO cycle, CheckBackID verification, timeout and tag rules, every error code, and where command feedback actually comes from.
ICCP Security: Hardening TASE.2 Links With IEC 62351
ICCP security explained: what native TASE.2 does and doesn't protect, the MMS service lockdown, TLS on port 3782, IEC 62351-4 authentication, and what to specify.
ICCP Transfer Sets: How TASE.2 Reporting Really Works
ICCP transfer sets explained: the lifecycle, every DSTransmissionPars parameter, how RBE, buffer time and integrity check interact, and four proven configurations.
Wireshark ICCP: How to Decode TASE.2 Traffic
Wireshark ICCP analysis: capture ports 102 and 3782, fix MMS decoding, tell ICCP from IEC 61850, and read associations, transfer reports, and device controls.
ICCP Conformance Blocks: What Servers Actually Support
ICCP conformance blocks decoded: what blocks 1-5 give you, why blocks 6-9 were removed, how to read Supported_Features, and the spec quirks around blocks 3, 11, 12.
The ICCP Protocol Stack: OSI Over TCP/IP Explained
ICCP protocol stack layer by layer: TASE.2, MMS and ACSE over OSI presentation and session, ITOT (RFC 2126) on TCP/IP, ports 102/3782, selectors, QOS and priority.
ICCP Bilateral Tables Explained (TASE.2 Access Control)
How ICCP bilateral tables work: the agreement behind them, association checks, per-object access control, the Bilateral_Table_ID variable, and the CIM exchange model.
What Is the ICCP Protocol? TASE.2 (IEC 60870-6) Explained
ICCP (TASE.2) connects utility control centers over WANs. How it works: MMS foundation, bilateral tables, transfer sets, device control, and conformance blocks.