{"asOf":"2026-09-02","merchant":"SSDF INC","id":"iec-61131","kind":"middleware","title":"IEC 61131-3 / PLC","kicker":"The cell still has a PLC","body":"Ladder, FBD, ST, SFC. Codesys, TwinCAT, Rockwell. Safety I/O and e-stops still land here even when the arm speaks ROS. SSDF does not sell a PLC program.","clerk":"IEC. Not Open Robotics.","sku":"ssdf-robot-middleware-atlas","notes":["A ROS graph that bypasses the safety PLC is a finding, not a product.","OPC UA Robotics companion spec is the MES/PLC interoperability layer. Mapped, not wired."],"hardRules":["Atlas the regulator. Credential the packet. Do not sell the robot.","A cobot is an application, not a robot class. ISO 10218-2:2025 absorbed ISO/TS 15066.","VDA 5050 is vehicle↔fleet. ROS 2 is middleware. Do not mix the layers.","A Passport is not a CE mark, an NRTL listing, or a SIL certificate.","No hosted ROS, Isaac, or Gazebo. No firmware. No robot NFT.","Desk review of a packet you send is Custom Deliverable. Robotics File Review is held.","Not the ISO or VDA text. Those bodies sell the standard. This is a map of the public surface."]}