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I need an experienced Siemens specialist to review, modify, and extend the PLC logic on an active production line. All programming will be done in TIA Portal, and the work includes: • Analysing the current STEP 7 code to spot inefficiencies or faults. • Implementing new control sequences and safety interlocks in accordance with our existing documentation. • Testing the revised logic with live I/O simulations before we deploy on-site. • Generating concise comments and a change log so future maintenance is straightforward. You will have remote access to the CPU (S7-1500 series) through a secure VPN, plus online support from our on-site technician during download and commissioning. Familiarity with industrial networks such as PROFINET and Modbus TCP is useful because the PLC exchanges data with drives, flowmeters, and an existing SCADA layer. I will provide the plant P&ID, tag list, and the latest project archive once we start. Please outline similar Siemens projects you have completed and confirm your availability for quick turnaround troubleshooting should unexpected faults arise after the first download.
Project ID: 40673461
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6 freelancers are bidding on average $29 USD 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] ◾HMI-Siemens ** Weintek ** Kinco ** Unitronics ** Hitachi ** Schneider ** Wecon ** DeepSeaElectronics ◾SCADA -WinCC ** In-Touch Wonderware ** Citect ** Ignition ◾ 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 ◾ Raspberry pi ** Raspi Camera ◾ Networking Devices - Siemens scalance, Teltonika, Waveshare Modbus Gateway, Moxa Gateway
$50 USD in 7 days
3.3
3.3

Hi, I understand you need a Siemens specialist to safely modify and commission an S7-1500 production PLC through TIA Portal, including control sequences, safety interlocks, I/O testing, and PROFINET/Modbus communication. My professional background is in software backend engineering, APIs, databases, and production troubleshooting rather than Siemens PLC programming, so I don't want to misrepresent my experience in this area. I would therefore not be the appropriate specialist for the PLC modification and commissioning itself.
$20 USD in 14 days
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Hello, I am an Instrumentation & Control Engineer with 7–8 years of industrial experience in PLC/DCS/SCADA, process instrumentation, commissioning, troubleshooting, and control systems. Your Siemens S7-1500/TIA Portal project is well aligned with my experience. I can support you with: Reviewing existing STEP 7 logic and identifying faults Modifying and extending control sequences Implementing control interlocks based on the existing documentation Reviewing P&IDs, tag lists, I/O and control logic PLC–SCADA and industrial communication troubleshooting PROFINET and Modbus TCP integration support Logic testing and I/O simulation before deployment Clear PLC comments and a structured change log Remote troubleshooting during commissioning and after deployment I understand the importance of making controlled changes to an active production system. My approach would be to first review the existing program and documentation, understand the current sequence and dependencies, test the proposed changes, and then support the commissioning process with your on-site technician. I am available for a quick turnaround and can provide continued remote troubleshooting support if required after the initial deployment. I would be happy to review the project archive and discuss the exact modifications required. Regards, Ashish Rawat Instrumentation & Control Engineer
$10 USD in 7 days
0.0
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I know its difficult job to find an expert who don’t waste your time. Are you looking for a professional PLC programmer? If so, I welcome you here. Hello Sir! I Mahtab Khan, an Electrical Automation Engineer and specialist in Siemens PLC programming, HMI design (TIA Portal) & Factory I/O simulations. I have strong knowledge and have completed multiple projects that I can showcase. So then, If you feel satisfactory, then assign your this project to me. My Previous Projects:- I have great experience on creating PLC ladder program and designing HMI for: • Position, speed & torque controlling of a servo motor (precise positioning) & stepper motor • Multiple projects, which contain pneumatic cylinders, solenoid valves and different analog / digital sensor. • Calculating the volume of liquid in a tank based on the liquid level. • IOT devices (IOT 2040, 2050) using node red • Controlling different conveyor belt movements through sensors • Light curtain sensors • Different Encoders, AC/DC motors • HMI screens, WinCC SCADA • Proportional Integral Derivative (PID) • Data Logging • MQTT, Node Red • PLC to PLC Communications (Data Transfer) • Data Transfer using Modbus TCP and Modbus RTU • USS Communication • VFD’s (Sinamics V20) • Solar Tracking Thanks!
$40 USD in 3 days
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I’m an Industrial Automation Engineer with practical experience in Siemens PLC programming, troubleshooting, control sequences and industrial communication. I’m interested in supporting the modification and extension of your existing Siemens S7-1500 system in TIA Portal. My relevant experience includes working with Siemens S7-1200 and S7-300 PLCs, developing automation sequences, sensor-based control, state retention, interlocks, and troubleshooting. I have also worked with PROFINET and Modbus communication, including PLC communication with VFDs and SCADA systems. One of my relevant projects was a Color Mixing System using two Siemens S7-1200 PLCs, an Altivar VFD, SCADA monitoring, PROFINET communication, and Modbus communication with the VFD. I also worked on an Automated Sorting and Storage System using two Siemens S7-300 PLCs with PROFIBUS communication, where I developed the control sequences, handling logic, SCADA/HMI monitoring, and performed testing and troubleshooting. For your project, I would follow a structured approach: first review the existing STEP 7/TIA Portal project and documentation, understand the current sequence and I/O behavior, implement the requested modifications, and test the logic using simulation and available I/O feedback. I’m also comfortable working remotely with an on-site technician during the download and commissioning process and can provide troubleshooting support after the initial deployment. Best regards, Mohamed Sallam
$25 USD in 7 days
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Hello, I can take this as a first, clearly bounded offline milestone. For $30 I will review the supplied TIA Portal archive, P&ID and tag list; identify the relevant program dependencies; and return a concise findings and change plan with risks and open questions. If the first requested change is standard non-safety logic and can be validated offline, I can include that single change plus a change log; otherwise I will quote phase 2 before editing. I will not alter safety functions or perform a live CPU download in this initial milestone. My background includes Siemens S7-1200/S7-1500, STEP 7 and TIA Portal, industrial process modifications, PLC-SCADA/MQTT integration, and machinery automation. I am available this week. Before award, please confirm the TIA version, whether the current project opens and compiles consistently, and which first non-safety change you want reviewed.
$30 USD in 1 day
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Sumatera Selatan, Indonesia
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