Axon Exchange — Complete Guide to the Multi-Protocol Substation Gateway Software

What Is Axon Exchange?

Axon Exchange is a software-based communications gateway and substation concentrator developed by Axon Group (Colombia). Its primary function is to act as the protocol translation and data concentration hub at the substation level — collecting real-time data from diverse IEDs (Intelligent Electronic Devices) of different types and brands, converting between multiple telecontrol communication protocols, and forwarding consolidated data to SCADA systems or energy management centers (EMS/DMS).

In power automation architecture, Axon Exchange fills the critical substation gateway layer — the intermediate tier between field-level IEDs (protection relays, RTUs, meters) and the control center SCADA. Rather than requiring the SCADA to communicate directly with each individual IED using different protocols, Axon Exchange aggregates all field device data and presents it to the SCADA through a single, unified protocol interface.

Axon Exchange is part of Axon Group’s broader power automation software suite, which also includes:

Axon Builder — SCADA/HMI software for supervision and control
Axon Test — protocol simulator for FAT/SAT testing (covered in our separate guide)
AT61 — IEC 61850 client/server and GOOSE simulator
Axon Comtrade — automatic protection data collection in COMTRADE format

Who Uses Axon Exchange?

Electric utilities operating transmission and distribution substations requiring centralized data collection from heterogeneous IED populations
Power system integrators building substation automation systems (SAS) for utility clients
Industrial plant operators with distributed control networks requiring protocol bridging between field devices and supervisory systems
SCADA engineers needing a flexible, software-configurable gateway that runs on standard Windows hardware without proprietary RTU hardware dependency
Control system architects designing redundant, high-availability substation communication infrastructure

Supported Protocols

Axon Exchange supports a comprehensive set of telecontrol and industrial communication protocols on both its data collection (southbound/master) and SCADA reporting (northbound/slave) interfaces:

Telecontrol Protocols

IEC 60870-5-104 — TCP/IP based telecontrol (dominant in European and international utilities)
IEC 60870-5-101 — Serial telecontrol (legacy installations and remote RTU links)
DNP3 LAN/WAN — DNP3 over Ethernet (dominant in North American utilities, widely used globally)
DNP3 Serial — DNP3 over RS-232/RS-485 serial links
IEC 61850 MMS — modern substation automation standard for IED communication
ICCP (Inter-Control Center Communications Protocol) — for control center-to-control center data exchange

Industrial Protocols

Modbus TCP/IP — ubiquitous industrial protocol over Ethernet
Modbus Serial (RTU/ASCII) — Modbus over RS-232/RS-485

OPC

OPC DA — integration with OPC-compliant SCADA and historian platforms

Each protocol can be configured as either a master/client (Axon Exchange polling field devices) or slave/server (Axon Exchange reporting to SCADA), providing maximum architectural flexibility.

Core Architecture

Southbound Interface (Field Device Collection)

Axon Exchange acts as master/client toward field IEDs:

Connects to protection relays, RTUs, meters, and other IEDs via serial (RS-232/RS-485) and Ethernet
Polls or subscribes to data from IEDs using their native protocols (IEC 61850 MMS, DNP3, IEC 60870-5-104, Modbus)
Collects: binary inputs (digital status), binary outputs (command positions), analog inputs (measurements), analog outputs (setpoints), time-stamped events (SOE — Sequence of Events)

Signal Processing and Logic Layer

Between southbound collection and northbound reporting, Axon Exchange processes raw data:

Protocol conversion — translate IEC 61850 data objects to DNP3 data points, or Modbus registers to IEC 60870-5-104 information objects, etc.
Signal manipulation functions — predefined functions for common transformations:
- Scaling analog values (engineering unit conversion)
- Boolean logic on digital inputs (AND/OR/NOT combinations)
- Dead-band filtering for analog values (report only changes exceeding a threshold)
- Accumulator and counter handling
Custom scripting — advanced logic via CFC (Continuous Function Chart) integration with Codesys IEC 61131-3, enabling programmable behavior management beyond standard signal manipulation
Data quality management — propagate and transform IEC quality flags (good/invalid/questionable) through protocol conversion

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Northbound Interface (SCADA Reporting)

Axon Exchange acts as slave/server toward the SCADA/EMS:

Presents the consolidated, protocol-converted data to the control center as a single coherent data source
Supports multiple simultaneous northbound connections — report the same data to multiple SCADA systems or redundant control centers simultaneously
Generates spontaneous (unsolicited) reports when digital inputs change state or analog inputs exceed dead-band thresholds
Responds to general interrogation from SCADA with complete current-value snapshots

Key Features

Multi-Protocol Simultaneous Operation

Axon Exchange can maintain multiple protocol connections simultaneously on both southbound and northbound interfaces — communicating with IEDs using IEC 61850, while reporting to the primary SCADA via IEC 60870-5-104 and to a backup center via DNP3, all at the same time on the same server.

Axon Exchange Viewer — Real-Time Monitoring

The Axon Exchange Viewer is the runtime monitoring tool that operates independently from the configuration environment:

Real-time signal table — all configured signals displayed with current value, quality flag, and timestamp
Connection status — live status of all active master/client and slave/server connections
Signal forcing — manually override signal values for testing without modifying the actual IED data (essential during commissioning)
Communication control — start, stop, or restart individual protocol connections without affecting others
Command execution — send commands directly from the Viewer for verification
Command log — detect configuration errors in slave device command handling or master device command transmission

Redundancy Support

Axon Exchange implements two redundancy models for high-availability deployments:

Hot Standby (Active/Passive):

Two instances run simultaneously (primary and secondary)
Only the primary instance actively reports data to SCADA
The secondary instance monitors the primary; on primary failure, the secondary automatically takes over
Switchover is transparent to the SCADA — no reconnection required

Hot-Hot (Active/Active):

Both primary and secondary instances actively receive data from connected IEDs simultaneously
Both are synchronized in real time
On primary failure, the secondary continues without interruption — no switchover delay
Maximum availability for mission-critical substation automation applications

PRP (Parallel Redundancy Protocol) Support

Axon Exchange includes an optional PRP add-on module — support for IEC 62439-3 Parallel Redundancy Protocol, which provides zero-recovery-time redundancy at the Ethernet network layer. PRP operates by transmitting identical frames simultaneously over two independent network paths; if one path fails, the other continues without any packet loss or switchover event.

Template Management

For engineering companies managing multiple similar substations:

Create project templates capturing standard configurations (typical substation layouts, standard IED types and signal lists)
Apply templates as the starting point for new projects, then customize for site-specific details
Dramatically reduces configuration time for repeat projects with similar architecture

Sequence of Events (SOE) Logging

Configure SOE capture to log time-stamped binary input changes to a local file
SOE records include: signal name, change value, timestamp (with millisecond resolution from IED timestamps where available), quality
File output in plain text format for integration with event analysis tools and incident investigation workflows

Report Generation

Periodic report export of system variables to plain text files
Configurable report schedule and content
Provides a longitudinal record of system variable states for trend analysis and operational review

SCL Explorer (IEC 61850)

For IEC 61850 environments, Axon Exchange includes SCL Explore — a tool for analyzing Substation Configuration Language (SCL) files:

Import and browse SCL/SCD/ICD files from IEDs and substation configurations
Navigate the IEC 61850 data model hierarchy without uploading to the gateway
Select required data objects and organize them under IED categories
Export selected data in CSV, XLS, or TXT format
Streamlines the IEC 61850 signal mapping process during project configuration

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Cybersecurity Features

Access control management — multiple user profiles with different privilege levels (read-only monitoring, operator control, administrator configuration)
Audit logging — log user actions for compliance and security review
Encrypted communications where supported by the protocol
Designed for compliance with utility cybersecurity frameworks (NERC CIP, IEC 62351 where applicable)

Configuration Workflow

Step 1 — Create a New Project

Launch Axon Exchange Config and create a new project, defining:

Project name and description
Gateway hardware/server identification
Communication channel definitions (Ethernet interfaces, serial ports)

Step 2 — Configure Southbound (Field Device) Connections

For each IED to be connected:

Add a new master/client device with the appropriate protocol (IEC 61850, DNP3, IEC 60870-5-104, Modbus)
Configure connection parameters: IP address and port (Ethernet) or COM port and baud rate (serial)
Define the signal list — assign signal names, descriptions, addresses/data references, and data types
For IEC 61850: use SCL Explore to import signal definitions from the IED’s ICD/CID file

Step 3 — Configure Signal Processing (Optional)

If protocol conversion or signal manipulation is required:

Map southbound signals to internal processing points
Apply scaling, dead-band, or logic functions as needed
Configure CFC/Codesys logic blocks for complex behavior (optional)

Step 4 — Configure Northbound (SCADA) Connections

For each SCADA or control center connection:

Add a new slave/server device with the SCADA’s protocol
Configure connection parameters
Map internal signals to the northbound address space — define SCADA-facing addresses and information object types

Step 5 — Configure Redundancy (If Required)

Define primary and secondary gateway instances
Configure synchronization parameters between instances
Configure PRP network interfaces if using hardware redundancy

Step 6 — Deploy and Monitor

Transfer configuration to the gateway server
Start the Axon Exchange service
Monitor active connections and signal data via Axon Exchange Viewer
Use signal forcing to verify SCADA receives correct data

Axon Exchange vs. Competing Substation Gateway Products

Feature	Axon Exchange	GE/Alstom D25	SEL-3505	Schneider ION Gateway
Software-only (no proprietary hardware)	✅	❌ Hardware appliance	❌ Hardware appliance	❌ Hardware appliance
IEC 61850 MMS support	✅	✅	✅	✅
DNP3 master/slave	✅	✅	✅	Limited
IEC 60870-5-104	✅	✅	✅	✅
Modbus TCP/Serial	✅	✅	✅	✅
ICCP	✅	✅	❌	❌
OPC DA	✅	Limited	❌	✅
Hot-Hot redundancy	✅	✅	✅	Limited
PRP support	✅ (add-on)	✅	✅	Limited
CFC/IEC 61131 logic	✅ (Codesys)	✅	✅	Limited
SCL Explorer	✅	❌	❌	❌
Windows-based deployment	✅	❌ Embedded Linux	❌ Embedded RTOS	❌ Embedded
Configuration interface	GUI-based	GUI-based	GUI-based	GUI-based
Integration with Axon Builder SCADA	✅ Native	❌	❌	❌
Integration with Axon Test (FAT/SAT)	✅ Native	❌	❌	❌

Axon Exchange’s key differentiator: It is a pure software solution running on standard Windows servers — no proprietary hardware appliance is required. This provides hardware independence, enabling deployment on the customer’s preferred server hardware, virtual machines, or existing SCADA server infrastructure. Combined with the native integration with Axon Builder and Axon Test, Axon Exchange offers a cohesive software-defined substation automation platform.

When hardware appliances are preferred: For installations requiring hardened industrial hardware (extended temperature range, shock/vibration resistance, DIN-rail mounting), purpose-built gateway appliances from GE, SEL, or ABB may be more appropriate. Axon Exchange running on an industrial PC provides a middle ground.

Integration with the Axon Ecosystem

Axon Exchange is designed to work natively with the broader Axon Group software suite:

Axon Builder (SCADA/HMI): Axon Exchange serves as the data source for Axon Builder visualization and control. The L/R (Local/Remote) connection between Axon Exchange and Axon Builder allows the SCADA to display real-time substation data and send control commands through the gateway.

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Axon Test (Protocol Simulator): During project development and commissioning, Axon Test can simulate the IEDs that Axon Exchange will eventually connect to — allowing the gateway configuration to be tested and verified before actual IEDs are available. Conversely, Axon Test can simulate the SCADA master station to test the gateway’s northbound reporting behavior.

AT61 (IEC 61850 Simulator): For IEC 61850-based substations, AT61 simulates IEC 61850 client/server and GOOSE devices to test Axon Exchange’s IEC 61850 connectivity without physical protection relays.

System Requirements

Component	Minimum	Recommended
OS	Windows 10, Windows Server 2012	Windows Server 2019/2022
RAM	1 GB free	3 GB or more
Storage	4 GB free	SSD with 20 GB+
Network	Ethernet adapter	Dual NIC for redundant networks
Framework	.NET 4.5 SP2	.NET 4.8
Visual C++	VC++ 2010, 2013, 2015	Latest redistributables
Additional	WinPCap or NPCAP (for PRP)	—

For high-availability deployments requiring Hot-Hot redundancy, two identical servers are needed — the Axon Exchange software runs on both, with configuration synchronized between them.

Frequently Asked Questions

Can Axon Exchange run on a virtual machine? Yes. Axon Exchange is a standard Windows application and runs on VMware, Hyper-V, and other hypervisor platforms. For redundancy scenarios, running primary and secondary instances on separate physical hosts (rather than VMs on the same physical server) is recommended for genuine fault tolerance.

How many IEDs can Axon Exchange connect to simultaneously? The supported number of concurrent connections depends on the license tier and available server resources. Axon Group provides scalable licensing — contact them for specific capacity requirements.

Does Axon Exchange support IEC 61850 GOOSE? IEC 61850 GOOSE (Generic Object Oriented Substation Event) is handled by the separate AT61 product in the Axon suite. Axon Exchange primarily handles MMS (Manufacturing Messaging Specification) for IEC 61850 client/server data exchange. Verify current GOOSE support in the latest Axon Exchange release notes.

Can Axon Exchange replace a traditional hardware RTU? Yes, in many applications. Axon Exchange running on an industrial PC can perform all the protocol conversion and data concentration functions of a traditional hardware RTU — with greater flexibility, easier configuration, and simpler protocol upgrades. The trade-off is the need for an industrial-grade PC rather than a certified IEC-hardened hardware appliance.

What is the licensing model? Axon Exchange licenses can be delivered as software (PC hardware-bound) or hardware dongle (USB key, portable between computers). The license provides access to all design and runtime features. Contact Axon Group for current pricing and capacity-based licensing options.

Summary

Axon Exchange is a flexible, software-defined substation gateway that bridges the gap between heterogeneous field IEDs and upstream SCADA systems through multi-protocol conversion, real-time data concentration, and high-availability redundancy — all running on standard Windows server hardware without proprietary appliance dependency.

For power utilities and system integrators who need a configurable, scalable gateway solution with deep protocol support (IEC 61850, DNP3, IEC 60870-5-104, Modbus, ICCP, OPC) and seamless integration with Axon Builder SCADA and Axon Test simulation tools, Axon Exchange provides a cohesive, software-centric approach to substation automation.

For licensing assistance or Axon Exchange configuration support, contact our team via Telegram: t.me/DoCrackMe