PLC Simulator
Pro
10 min

CCST 18 — Reading a Network Diagram

ccstdiagnosticsnetworkControlLogixdrive
CCST 18 — Reading a Network Diagram scenario preview

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Briefing

Given a description of a PLC network: ControlLogix L73 (controller), POINT I/O adaptor, and a Kinetix servo drive, write the ladder logic that sends DRIVE_ENABLE when ESTOP is not tripped and HOME_SWITCH is true.

Objectives

  • Interpret the device network description
  • Combine ESTOP (NC) and HOME_SWITCH (NO) to produce DRIVE_ENABLE
  • Simulate the output correctly

Hints

  • DRIVE_ENABLE := NOT ESTOP AND HOME_SWITCH

I/O Table

Inputs

ESTOP

E-stop (asserted=tripped)

BOOL · %I0.0

HOME_SWITCH

Home position limit switch

BOOL · %I0.1

Outputs

DRIVE_ENABLE

Servo drive enable

BOOL · %Q0.0

Your program will be tested against:

All test cases run automatically when you submit. Assertions are hidden until you pass.

  1. #1Drive enabled when homed and safe

    Drive enabled when homed and safe

  2. #2Drive disabled on ESTOP

    Drive disabled on ESTOP

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