Fanuc SDK
1100 (EUR) • 1300 (USD)
$
1300
lifetime$
780
for universities (40% discount)Quickly create .NET applications that communicate with your Fanuc industrial robot.
.NET
Python
LabVIEW
Plug & Play
Connect your robot in just a few minutes. No license manager to install, no USB key. Only reference the library.
No plugins to install on the robot
Use of network protocols provided as standard by the robot controller.
Karel ROS
30-day trial
Try it free for 30 days, no commitment, no registration required
Pay once, use forever
Perpetual license, no subscription required, regardless of the number of robots, developers, or redistributed software
Customer Success Stories
Discover how our customers integrate UnderAutomation solutions into their industrial projects.
Fanuc SDK Features: Telnet, SNPX, FTP & Kinematics
Remote commands
Telnet KCL (Keyboard Command Line) allows you to send commands to control the robot remotely - no additional option is necessary on the controller.// Connect to the robotrobot.Connect(parameters);// Reset alarmsrobot.Telnet.Reset();// Run a programrobot.Telnet.Run("MyProgram");robot.Telnet.Pause("MyProgram");robot.Telnet.Hold("MyProgram");robot.Telnet.Continue("MyProgram");robot.Telnet.Abort("MyProgram", force: true);// Set a variablerobot.Telnet.SetVariable("$RMT_MASTER", 1);// Set an output port (example: DOUT port 2 = 0)robot.Telnet.SetPort(KCLPorts.DOUT, 2, 0);// Simulate an input port (example: DIN port 3 = 1)robot.Telnet.Simulate(KCLPorts.DIN, 3, 1);robot.Telnet.Unsimulate(KCLPorts.DIN, 3);}Click to see the full codeHigh-speed data reading and writing
SNPX (also known as SRTP/Robotif) allows rapid and structured data communication with the robot. It is used to read/write the registers, monitor alarms and check the condition of the robot.// Connect to the robotrobot.Connect(parameters);// Read a registerPosition posReg1 = robot.Snpx.PositionRegisters.Read(1);float numReg5 = robot.Snpx.NumericRegisters.Read(5);string strReg10 = robot.Snpx.StringRegisters.Read(10);// Write a registerposReg1.CartesianPosition.X = 100;robot.Snpx.PositionRegisters.Write(1, posReg1);robot.Snpx.NumericRegisters.Write(2, 123.45f);robot.Snpx.StringRegisters.Write(3, "Hello, world!");// Read a variableint rmtMaster = robot.Snpx.IntegerSystemVariables.Read("$RMT_MASTER");string lastAlm = robot.Snpx.StringSystemVariables.Read("$ALM_IF.$LAST_ALM");Position cellFloor = robot.Snpx.PositionSystemVariables.Read("$CELL_FLOOR");// Write a system variablerobot.Snpx.IntegerSystemVariables.Write("$RMT_MASTER", 1);robot.Snpx.StringSystemVariables.Write("$ALM_IF.$LAST_ALM", "No alarms");robot.Snpx.PositionSystemVariables.Write("$CELL_FLOOR", cellFloor);// Write a Karel program variablerobot.Snpx.IntegerSystemVariables.Write("$[KarelProgram]KarelVariable", 1);// Read and Write I/O (SDI,SDO,RDI,RDO,UI,UO,SI,SO,WI,WO,WSI,PMC_K,PMC_R)robot.Snpx.RDO.Write(1, true);ushort ai5 = robot.Snpx.AI.Read(5);// Read and Write analogs (AI,AO,GI,GO,PMC_D)robot.Snpx.AO.Write(2, 5);ushort ao3 = robot.Snpx.AO.Read(3);// Clear alarmsrobot.Snpx.ClearAlarms();}Click to see the full codeFile and decoding
Direct access FTP to the memory of the robot for file transfer, reading variables and the management of the robot state, all in decoded and ready to be used in structured .NET objects.// Connect to the robotrobot.Connect(parameters);IOState ioState = robot.Ftp.GetIOState();// Read a variablevar variableFiles = robot.Ftp.GetAllVariables();foreach (var variableFile in variableFiles)foreach (var variable in variableFile.Variables)Console.WriteLine($"{variable.Name} = {variable.Value}");// Read system variable $RMT_MASTERint remoteMode = robot.Ftp.KnownVariableFiles.GetSystemFile().RmtMaster;// Read safety statusSafetyStatus safetyStatus = robot.Ftp.GetSafetyStatus();Console.WriteLine($"Emergency Stop: {safetyStatus.ExternalEStop}");Console.WriteLine($"Teach Pendant Enabled: {safetyStatus.TPEnable}");// Get current position for each arm (Joints, World position of each tool, user frame positions)CurrentPosition currentPosition = robot.Ftp.GetCurrentPosition();// Upload a TP program to the controllerrobot.Ftp.DirectFileHandling.UploadFileToController(@"C:\Programs\MyPrg.tp", "md:/MyPrg.tp");// Download a file from the robotrobot.Ftp.DirectFileHandling.DownloadFileFromController("md:/Backup.va", @"C:\Backup\Backup.va");// Delete a file on the robotrobot.Ftp.DirectFileHandling.DeleteFile("md:/OldProgram.tp");}Click to see the full codeInverse kinematics
Algebraic calculation of the direct and inverse kinematics of any Fanuc robot or cobot from its DH parameters.FanucRobot robot = new FanucRobot();robot.Connect("192.168.0.1");// Get DH parameters// Example: CRX-10iA/LDhParameters dh = new DhParameters(-540, 150, -160, 0, 710, 0);// From a known arm modeldh = DhParameters.FromArmKinematicModel(ArmKinematicModels.CRX10iA);// From OPW parameters: M10iA/7Ldh = DhParameters.FromOpwParameters(0.15, -0.20, 0.60, 0.86, 0.10);// From an online robot (SYSMOTN file)dh = DhParameters.FromSymotnFile(robot.Ftp.KnownVariableFiles.GetSymotnFile())[0];// Forward kinematicsCartesianPosition pose = KinematicsUtils.ForwardKinematics(position, dh);// Inverse kinematics with multiple solutionsJointsPosition[] positions = KinematicsUtils.InverseKinematics(pose, dh);}}Click to see the full codeMotion Interfaces
Implementation of the Fanuc RMI (R912) and Stream Motion (J519) protocols which allows you to simply send movement commands to the robot, as well as read and write its inputs, outputs and registers.parameters.Rmi.Enable = true;robot.Connect(parameters);// Initialize the RMI_MOVE program on the controller.// TP must be disabled and the controller must be in AUTO mode.robot.Rmi.Initialize();// Linear motion at 100 mm/s to a Cartesian target (tool 1, frame 0)var instr = new LinearMotionTpInstruction{SpeedType = RmiLinearSpeedType.MmSec,Speed = 100,TermType = RmiTerminationType.Fine,Target = new CartesianPositionWithUserFrame(500, 200, 300, 0, 90, 0, tool: 1, frame: 0)};RmiInstructionResponse r = robot.Rmi.SendTpInstruction(instr);// Wait for the controller to confirm the motion completedr.WaitForCompletion();if (r.Status == RmiInstructionStatus.Error)System.Console.WriteLine("Error: " + r.ErrorText);// Abort when done - always end the session with Abort() or Disconnect()robot.Rmi.Abort();robot.Disconnect();}}Click to see the full codeOffline tools
The features without the need for robot allow you to handle standard file formats (variable file, error list, robot status, etc.).static void Main(){// Parse a variable file and extract a hierarchical list of variablesGenericVariableFile vaFile = FanucFileReaders.VariableReader.ReadFile("C:/path/to/variable.va", Languages.English);foreach (var variable in vaFile.Variables)Console.WriteLine($"{variable.Name} = {variable.Value} [{variable.Type}]");// Edit and regenerate the variable filevaFile.GenerateVa("C:/path/to/variable_modified.va\"");// Parse several types of filesFanucFileReaders.ErrorListReader.ReadFile("C:/path/to/errall.ls", Languages.English);FanucFileReaders.IOStateReader.ReadFile("C:/path/to/iostate.dg", Languages.English);FanucFileReaders.SafetyStatusReader.ReadFile("C:/path/to/safety.dg", Languages.English);FanucFileReaders.CurrentPositionReader.ReadFile("C:/path/to/curpos.dg", Languages.English);}Click to see the full codeBrowse the documentation
Guides and how-to articles
The SDK covers the main features of Fanuc robots through several native Ethernet protocols. Depending on the options installed on your controller and its generation, some protocols may or may not be available. Each article below explains how to perform a specific task and compares the different approaches.
Download and test
Windows application exampleAllows you to test all the features of the SDK with a simple interface. The example is compiled in "self contained" and "single file" with .NET 8. The application is portable without installation.
UnderAutomation.Fanuc.Showcase.Forms.exe (139 MB)By downloading, you accept the general conditions of use:
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Pricing
Libraries can be downloaded for free and can be tested for 30 days. After this period, you can ask us to extend the trial period, or buy the license that suits you best: standard, pro or source. After purchasing, you have a maintenance period, giving you access to the support and the possibility of updating. When you buy a license to use, it is linked to a robot brand, you can use it forever, without recurring fee, regardless of the number of robot, developer or software that you redistribute to your customers. If you are a distributor and wish to offer your customers one of our products, please contact us to discuss special conditions and prices.
Standard Site License
1100€ (EUR) • $1300 (USD)
$
1300
lifetime$
780
for universities (40% discount)Buy nowDesigned for industrial environments, providing lifetime full-feature access.1 year maintenance included (access to updates)Same conditions as the Pro License, except that support is not prioritized and maintenance is 1 year.There are no internal sources; only the obfuscated DLL is provided.No assistance by videoconference (only via email).Most popularPro License
1700€ (EUR) • $2000 (USD)
$
2000
lifetime$2960
$
1200
for universities (40% discount)Buy nowFor critical production environments requiring priority support and longer-term maintenance.3 years maintenance included (access to updates) with no renewal orders during this term (zero paperwork)Complete and permanent SDK: no recurring subscription is required, the license is yours forever and works in all programming languages for a robot brand.Can be used only by the organization holding the license, at the postal address indicated. All team developers will share the same license, regardless of the number of development machine.Any application developed using the SDK can be delivered to an unlimited number of your customers at no additional cost, regardless of the number of robots to connect.The license is a kind of password to call in the code that unlocks the features. No additional software to install. No USB key.Priority Support (<24h on average)Remote assistance (email and up to 2h videoconference)There are no internal sources; only the obfuscated DLL is provided.Upgrade to Source anytime (pay the difference)Source license
3400€ (EUR) • $4000 (USD)
$
4000
lifetime$
2400
for universities (40% discount)Buy nowFor complete technical sovereignty, deep customization, and total independence.Same conditions as the pro licenseComplete internal code of the library in C#Visual Studio solution that includes thousands of lines of code developed over several yearsYou can modify this source code and use it in your application, within the limits defined in the general terms of useWorks seamlessly with AI coding agents (Claude, Copilot, Cursor, Codex...) thanks to full source code access and included context files (AGENTS.md) that give the LLM the exact knowledge of the SDK internals







