Differences between IEC 60870-5-102 and IEC 60870-5-104
Intended audience: readers who already have a basic understanding of the 104 protocol.
This is a detailed reference comparing IEC 60870-5-102 and IEC 60870-5-104, covering fundamentals, communication architecture, message interaction, and ASDU details.
A deep comparison between IEC 102 and IEC 104
1. Core purpose and application scenarios
Dimension
IEC 60870-5-102 (102)
IEC 60870-5-104 (104)
Full name
Companion standard for the transmission of integrated totals in electric power systems
Companion standard for network access using standard transport profiles
Core use
"Metering": dedicated to electric energy billing systems.
"Monitoring": used for SCADA in substations.
Primary data
Historical/real-time accumulated energy (peak/off-peak/flat tariffs).
Four-remotes data (status, measurement, control, setpoint).
Real-time performance
Relatively low — typically minute-level or scheduled daily reads.
Very high — millisecond-resolution Sequence-of-Events (SOE) reporting.
2. Communication architecture and protocol stack
2.1 IEC 102: Enhanced Performance Architecture (EPA)
- Model: Follows a three-layer OSI model (physical, data-link, application).
- Medium: Originally designed for serial interfaces (RS-232/485) using asynchronous byte transmission.
- Frame format: Uses the FT1.2 frame format (start byte
68Hor10H, stop byte16H, and a checksum).
2.2 IEC 104: Network-access architecture
Comments (0)
Sign in to leave a comment
Sign In