Tutorials and reference guides for the SEL Real Time Automation Controller (RTAC) — ACSELERATOR RTAC software, tag database, SEL protocol, DNP3 master/outstation, Modbus, IEC 61850, IEC 61131-3 programming, HMI displays, and NERC CIP cybersecurity.
View Our SCADA & Programming ServicesThe SEL RTAC is a substation automation controller serving four roles: protocol gateway, data concentrator, IEC 61131-3 automation controller, and optional web-based HMI.
How to navigate acSELerator RTAC — project tree, tag processor, protocol drivers, IEC 61131-3 editors (ST/LD/CFC), and online diagnostics.
How IEC 61131-3 programming works in the RTAC — supported languages, task configuration, SEL power system function block library, and program organization.
How to diagnose RTAC issues — protocol communication faults, BAD tag quality, IEC 61131-3 program errors, deploy failures, time sync problems, and HMI access issues.
The SEL Real Time Automation Controller (RTAC) is a substation automation controller and multi-protocol gateway manufactured by Schweitzer Engineering Laboratories. It collects data from SEL …
Current SEL RTAC platforms — SEL-3530-4, SEL-3350, SEL-3555/3560, SEL-3505, and Axion — plus legacy notes on SEL-3530 and SEL-3354.
How the RTAC tag database works — tag types, naming conventions, quality attributes, system tags, scaling, aliasing, and organization for large substations.
How to configure the RTAC as a SEL protocol client to poll SEL relays for relay word bits, metering, events, and target states over serial …
How to configure the RTAC as a DNP3 master to poll third-party RTUs, meters, and relays — outstation setup, data mapping, unsolicited responses, and integrity …
How to build the optional web-based RTAC HMI with acSELerator Diagram Builder (SEL-5035) — one-lines, metering, alarms, trends, and operator controls.
How to install ACSELERATOR RTAC (SEL-5033), create a new RTAC project, and connect to an SEL-3530 or SEL-3555 over Ethernet or serial.
How to configure the RTAC as a DNP3 outstation to serve aggregated substation data to SCADA masters — data point mapping, event classes, unsolicited responses, …
How to configure Modbus TCP and RTU client and server drivers in the RTAC — register mapping, data types, byte order, and integration with meters …
How to configure the RTAC as an IEC 61850 MMS client and GOOSE subscriber — SCL file import, logical node mapping, GOOSE subscription, and modern …
How to write Ladder Diagram programs in ACSELERATOR RTAC for substation automation — contacts, coils, timers, and practical breaker control and interlock examples.
How to write Structured Text programs in ACSELERATOR RTAC — syntax, data types, tag access, quality checking, and power system calculation examples.
How to use Continuous Function Chart (CFC) programming in acSELerator RTAC — SEL's FBD-style editor for wiring blocks, power system library, PID, and analog chains.
How to harden the SEL RTAC for NERC CIP — password management, port hardening, role-based access, audit logging, encrypted communications, and electronic security perimeter design.
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