iec60870.h File Reference

IEC 60870-5-101 / -104 telecontrol (SCADA) codec (DETWS_ENABLE_IEC60870). More...

#include "ServerConfig.h"

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Detailed Description

IEC 60870-5-101 / -104 telecontrol (SCADA) codec (DETWS_ENABLE_IEC60870).

The IEC 60870-5 utility-SCADA protocol in its two common transports:

• -104 over TCP: the APCI (68 LEN + 4 control octets) in its I / S / U formats, carrying an ASDU. I-format transfers numbered information (send/receive sequence numbers); S-format acknowledges; U-format does STARTDT / STOPDT / TESTFR.
• -101 over serial: the FT1.2 link frames - fixed length (10 C A CS 16) and variable length (68 L L 68 C A <ASDU> CS 16, 8-bit sum checksum), with a 1-octet link address.
• The shared ASDU header (type id, variable structure qualifier, cause of transmission, common address) and the 3-octet Information Object Address used by both.

The per-type-id information elements (single/double point, measured values, commands) are the application's; this is the framing + ASDU-header layer, with named type-id / COT constants for the common ones. Pure and host-tested. Bridge an RTU / outstation onto Wi-Fi: run -104 over the shipped TCP stack, or -101 over a UART through an RS-232/485 transceiver.

Author

Douglas Quigg (dstroy0)

Date

2026

Definition in file iec60870.h.