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Practice missions
Mission 33 · Pro UDT and structure exercise

Describe one pump with a structure

Keep a pump’s data together under one tag name.

On every : Status.Ready is Permit AND NOT Fault. PumpOn is Start AND Status.Ready. Status.Running copies PumpOn. Status.Level copies the measured Level.

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The 3D process tank this mission runs on Pro mission
Test replay

Status matches this scan

Set by the testChecked by the testStep 5 of 5 · 620 ms
Level
Applied
Time
About 12 min
Reward
+150 XP
Rig
3D process tank
Siemens editors
SCL
Rockwell editors
Structured Text
Course stage
19. Group equipment information
Automatic tests

What the tests check

  1. Status.Ready changes at once when Permit or Fault changes.
  2. PumpOn and Status.Running follow Start and Status.Ready on every scan. They do not on.
  3. Status.Level copies Level every scan, decimals included.
  1. Try it Use the buttons below the model and watch the rig respond.
  2. Test solution Every check runs on your code in one press.
  3. Replay If one fails, step through it one scan at a time to see why.
Why it matters

Where you’d see this on site

At a pump panel, an engineer checks each pump. Is it ready, is it told to run, and is its tank level right?

Mixing up those values can make a failed pump look healthy. Here, Running copies the command. It does not prove the motor turned.

Where you'd find thisMaking one batch of drink

At a drinks factory, valves let measured amounts of water and syrup into a mixing tank. An electric mixer blends them into one batch. An outlet valve then sends the drink to a holding tank. Filling machines bottle it from there.

  1. Ingredient tanksHold the water and syrup
  2. Mixing tankFill, mix and measure one batchYou are here
  3. Holding tankKeeps the finished drink ready
  4. Bottle fillerPuts the drink into bottles
On a real site: places, parts and safety
  • Drinks factory — blending water and syrup
  • Paint factory — mixing ingredients into a consistent colour
  • Water-treatment works — preparing a measured chemical mixture
  • Brewery — heating water for washing equipment

A full tank does not close its own inlet. Water keeps arriving until the valve closes, so an open inlet can flood the room.

A heater that is not covered by liquid can overheat. Real tanks have separate safety devices as well as the PLC programme.

The sizes, timings and cutaways are teaching choices, not a drawing of any one real installation.

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