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Pro Toolkit virtual simulator

Motor Starter and Interlock Simulator

Build intuition around seal-in, stop priority, permissive chains, field feedback, and timeout diagnostics without presenting standard PLC logic as a safety function.

Virtual educational simulator

Three-wire starter and interlock lab

Step a seal-in circuit, switch Manual or Auto requests, open permissives, inject auxiliary-feedback faults, and compare command versus proof across scans.

Manual field conditions

Change one condition, then step a scan to see stop priority and seal-in behavior.

PLC image and field proof

Scan 0 · mismatch 0/3

stopped
Starter commandFALSE
Motor_Run_Cmd
Auxiliary feedbackFALSE
Motor_Run_FB
Ready. Apply a start request, then step the virtual PLC scan.
Motor_Run_Cmd := Stop_Circuit_OK AND Safety_System_OK AND Motor_OL_OK AND Process_Permissive AND (Start_PB OR Motor_Run_Cmd);

PLC tag mapping

Replace the example names with tags from your project. Use the L5K explorer to build an inventory first; this mapping remains browser-local and does not connect to a controller.

Scan history

Virtual starter loaded in Manual mode.

Safety boundary

This model treats safety-system health only as a read-only standard-control permissive. It is not a safety relay, safety PLC, risk assessment, validated stop function, lockout procedure, or authorization to bypass a guard, E-stop, overload, or interlock.

Requires Pro Toolkit

Motor starter and interlock simulator

Free preview

Inspect the starter inputs, custom tag map, command, feedback, and safety boundary in a fixed preview state.

Paid operation

Step or run seal-in logic, switch Manual and Auto requests, edit PLC tag names, open stop-priority conditions, tune feedback timeouts, and inject starter feedback faults.

Unlocks with Pro Toolkit
  • Manual and automatic three-wire control
  • Editable PLC tag mapping and stop-priority chain
  • Command-feedback timeout diagnostics
Toolkit $5/mo · Pro Toolkit $15/mo

This workspace requires Pro Toolkit. The standard Toolkit tier does not unlock it.

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Your plan applies across the site. Work saved on this device is not synchronized to other devices.

Motor Starter and Interlock Simulator | Automation Controls Toolbox