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My Variable Frequency Drive is running on existing code that now throws unexpected errors during operation. I need an experienced developer to dive into the current project, isolate the bugs, and deliver a clean, reliable version of the program that restores full functionality. You will have remote access to the controller and the full source package as soon as we agree on an NDA. Once inside, I expect you to: • trace and document the root cause of the faults, • correct the offending sections of code, and • verify the fix on-site or through simulated load tests so the drive performs to spec across all speed ranges. The job is complete when the code compiles without warnings, the VFD responds accurately to every command sequence, and I receive the updated source with a brief changelog explaining what was altered and why. If you work comfortably with VFDs and can deliver clear, well-commented bug fixes, let’s get started.
Project ID: 40398130
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Active 17 days ago
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9 freelancers are bidding on average ₹24,944 INR for this job

The professional with 16 years of experience in Industrial Automation. ^^Development,Commissioning of PLC Control System, HMI and SCADA^^ ◾PLC- Siemens [S7-1500F/H, S7-400, S7-400F/H/R, S7-300, S7-1200, S7-200, S5, TI PLC, LOGO!] Rockwell [(Allen Bradley)- SLC500,MicroLogix,CompactLogix.] Schneider [Zelio, M171/72] Automation Direct [DirectLogic Click PLC] Unitronic [V200-18-E3XB Controller] Delta [Delta DVP ES2] Click [C2 series] ◾HMI- Siemens ** Weintek ** Kinco ** Unitronics ** Hitachi ** Schneider ** Wecon ** DeepSeaElectronics** EZ Automation**Maple ◾SCADA - WinCC ** In-Touch Wonderware ** Citect ** Ignition ◾VFD- Siemens, Rockwell-AB, ABB, Telemechanique, SEW and Danfoss, Hitachi ◾ Industrial Networks- PPI-MPI ** Profibus ** AS-i ** Profinet ** Ethernet ** Modbus RTU/Modbus TCP ◾ OPC - PC Access ** OPC Scout ** OPCUA ** Metrikon ** Kepware ◾ Project Documentation- ISA88/95, GAMP, 21CFR Part11, VP, URS, FRS, DS, IQ, OQ, PQ, SOP. ◾ Programming Languages - C# ** VBA ** VB.net ** Javascript ** Python ◾ Arduino Uno ** RS485 ** Ethernet shield ** Data Logging ◾Raspberry pi ** Raspi Camera ? Networking Devices - Siemens ** Teltonika ◾OT Cybersecurity ? NIS2 Compliance **NO OFFSITE COMMUNICATIONS**
₹25,000 INR in 7 days
5.5
5.5

Hello, This is a critical system, so the focus will be on precision, stability, and controlled debugging rather than quick fixes. I can remotely access your setup, review the full source, and start with a structured analysis to trace the exact root cause of the faults. This includes checking control logic, timing behavior, edge cases, and how the VFD responds across different speed ranges and command sequences. Once identified, I will correct the problematic sections with clean, well-commented code, ensuring no side effects on existing functionality. The fixes will then be validated through simulated load testing and controlled scenarios to confirm stable and accurate performance. You will receive: Clean updated source code Code that compiles without warnings Verified behavior across all operating conditions A concise changelog explaining what was fixed and why Experience with embedded systems and control logic helps in diagnosing such issues effectively without trial and error. Ready to proceed under NDA and start immediately.
₹25,000 INR in 2 days
0.0
0.0

Hi! I Saw the VFD is throwing errors during operation. Usually, that’s a logic conflict in the firmware or a timing issue in the C code once it hits a specific load. I'll dive into the source package, isolate the specific blocks causing the crash, and get the drive responding correctly across the full range. Just send over the NDA and I'll get started on the root cause analysis and documentation immediately.
₹25,000 INR in 5 days
0.0
0.0

Hi there, I understand you need a developer to stabilize your VFD firmware, isolate recurring faults, and deliver a production-ready source code package. With my background in embedded systems and firmware development—specifically working with bare-metal programming and HAL—I am well-equipped to trace these issues to their root cause. My Approach to Your Project: Systematic Debugging: I will utilize remote access to monitor real-time registers and interrupt execution. I’ll focus on identifying if the errors stem from race conditions, improper memory handling, or timing mismatches in the control loop. Code Optimization: I will refactor the offending sections to ensure the code compiles without warnings and remains stable across all speed ranges, from low-speed torque requirements to high-frequency operation. Validation: I will work with you to perform simulated load tests, ensuring the drive responds accurately to every command sequence as per the specification. Documentation: You will receive the updated source code with clear comments and a detailed changelog explaining every modification for your future reference. I am comfortable working under an NDA and have extensive experience designing and debugging complex hardware/firmware environments (including Arduino and STM32 ecosystems). I pride myself on writing clean, reliable code that restores full hardware functionality. Looking forward to discussing the controller specifics and getting your VFD back to spec.
₹25,000 INR in 7 days
0.0
0.0

Subject: Expert in Arduino Debugging & Logic Optimization Hi! I am a Computer Science student with strong hands-on experience in hardware-software integration and debugging C++ logic for microcontrollers. I recently completed a complex Automated Toll System using Arduino, which involved managing multiple sensors (RFID, IR) and real-time motor control. I am very familiar with tracing faults in existing code and optimizing logic for smooth operation. For your VFD project, I will: 1. Conduct a full code trace to identify the specific logic error. 2. Clean and optimize the offending functions to ensure stability. 3. Provide a documented report on the fix so your team can maintain it easily. I am ready to start immediately. Let’s get your VFD running perfectly!
₹15,000 INR in 3 days
0.0
0.0

I have Understood your problem with VFD, I am currently located in Chandigarh, I have team of Experienced engineers. We have experience of 15 years, in industrial automation (developing, Debugging, troubleshooting PLC, VFD, servo drive, HMI and Scada and develop new program as per customer's need. we provide solutions on multiple brands of plc , VFD, Scada, HMI, Servo Drive, (siemens, Delta, Schneider, Allen Bradley, Control technique) we will: trace and document the root cause of the faults, correct the offending sections of code, and verify the fix on-site or through simulated load tests so the drive performs to spec across all speed ranges. we will provide you document with updated source with a brief changelog explaining what was altered and why. we can start project immediately as soon as you will response.
₹25,000 INR in 6 days
0.0
0.0

I bring deep, hands-on experience across the industry’s leading platforms, including Schneider, Danfoss, Yaskawa, Fuji, Delta, and Siemens. This breadth of knowledge allows me to quickly identify whether a fault is rooted in high-level logic, specific hardware limitations, or parameter conflicts unique to these manufacturers. I am ready to sign the NDA and apply my experience with multi-brand drive logic to resolve your project's issues immediately.
₹22,000 INR in 7 days
0.0
0.0

Ambāla, India
Member since Apr 25, 2026
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