Senior PLC Programmer - Siemens

Senior Siemens PLC Programmer (3+ Years)

Location:

About Mechatronics International

Mechatronics International is an Indiabased automation company building warehouse, machine, and plant automation solutionsincluding ASRS systems, miniload shuttles, parcel sorters, DWS, and custom machinery. We integrate multidisciplinary technologies (PLC, motion, robotics, IoT) with a customercentric, fastresponse approach.

Role Summary

Senior Siemens PLC Programmer

Key Responsibilities

• Design & Development

  : Create PLC logic in TIA Portal (LAD/SCL) using IEC 611313 best practices, modular FB/UDT patterns, and state machines.

• HMI/SCADA

  : Develop WinCC (Comfort/Advanced/Unified) screens, faceplates, and diagnostics; ensure command/feedback symmetry and clear alarm texts.

• Drives & Motion

  : Configure and commission

  SINAMICS

  (G120/S120/Startdrive), servo axes, encoders, VFDs; implement safe torque off and speed monitoring where applicable.

• Safety

  : Implement and validate safety logic on

  FCPUs

  and Profisafe devices; collaborate with electrical team on ISO 13849/IEC 62061 compliance.

• Networks & Protocols

  : Architect and debug

  PROFINET/Profisafe

  , OPC UA, Modbus TCP; integrate thirdparty devices (scanners, weighers, barcode/RFID, vision, robots).

• Testing & Commissioning

  : Plan and execute

  FAT/SAT

  , write simulation/test modes, and deliver commissioning checklists and reports.

• Standards & Readability

  : Enforce company PLC standard (OB1 orchestrationonly; consistent Cmd/Ilk/Sts/Alm interfaces; alarm catalog; constants DB; IO lists).

• Version Control

  : Export blocks (XML/ST) for Git; maintain changelogs, release notes, and configuration baselines.

• Documentation

  : Produce IO lists, alarm lists, parameter sheets, and FB headers (Purpose/IO/Assumptions/States/Alarms/Tests).

• Collaboration

  : Work with mechanical, electrical, and software teams; support panel design reviews and field wiring clarifications.

• Support

  : Train maintenance teams; provide remote support; drive continuous improvements based on site feedback.

Required Qualifications

• 3+ years

  handson with

  Siemens TIA Portal

  (S71200/1500), WinCC (Comfort/Advanced/Unified), and industrial networking (PROFINET).
• Strong command of

  Ladder

  and

  Structured Text (SCL)

  ; comfortable building

  FBs/UDTs

  , sequences (FSM), and reusable libraries.
• Experience with

  SINAMICS

  drives (Startdrive), VFD/servo commissioning, and motion basics (homing, jogging, speed/position loops).
• Practical knowledge of

  industrial safety

  (FCPU, Profisafe IO, Estop/guarding) and standards (IEC 611313; exposure to ISO 13849/IEC 62061 preferred).
• Able to read electrical schematics (EPLAN/AutoCAD), generate IO lists, and collaborate with panel design.
  
• Proficient in

  testing/commissioning

  —fault finding, instrumentation use (multimeter, scope), and structured troubleshooting.
• Clear, structured documentation and communication; ownership mindset and customerfacing professionalism.
  

Good to Have

• Experience in

  ASRS, conveyors, sortation, robotics

  (ABB/KUKA/FANUC integration) or machine vision.
• OPC UA servers/clients, NodeRED/Siemens

  IOT2050

  , MQTT, REST APIs, or basic MES/WMS interfacing.
• SCADA dashboards, reporting, and historian basics.
  
• Exposure to pneumatics/hydraulics, barcode/RFID, weigh scales, and safety relays.
  
• Familiarity with Git, ClickUp/Jira/Notion, and structured code reviews.
  

Key Performance Indicators (KPIs)

• Ontime delivery of software milestones (FAT/SAT).
  
• Code readability and reuse (review pass rate against company standard).
  
• Commissioning issue closure time and firsttimeright rate.
  
• Uptime/throughput of deployed systems during warranty.
  

What Success Looks Like (90 Days)

• Own a module (e.g., pallet shuttle, stacker crane, sorter branch) from design FAT site SAT.
  
• Establish reusable FB templates and faceplates adopted by the team.
  
• Improve diagnostic coverage (alarm catalog + “Why Not Running”) across one live project.
  

Work Conditions

• Onsite

  at Sikri, Faridabad; travel to client sites (domestic; occasional international) for commissioning.
• Flexible hours during commissioning; otherwise standard business hours.
  

Why Join Us

• Build productiongrade automation used by leading logistics/automotive clients.
  
• Fast decision cycles, high ownership, and scope to shape standards and tooling.
  
• Learn across PLC, motion, robotics, and IoT stacks.
  

How to Apply

parshant@mechint.in

Notes for Candidates

state machine patterns