Electrical Control of Industrial Mechanisms · PLC-200 trainer · S7-200 CPU 224

Lab work report

One report per group. Attach the program listing printed from STEP 7-Micro/WIN. The “Initials” boxes are signed by the instructor during the session. Grey italic text is an example: replace it.

Lab title

Lab no.

Group

Bench no.

Session date

Instructor

CPU and firmware read

Preparation—/3

Program—/6

Bench—/6

Report—/5

Total—/20

The group

Full name	Student ID	Role at the bench	Signature

Roles: programmer, tester (operates the bench and fills in the log), reporter. Swap roles from one lab to the next.

Preparation

/ 3

Done before the session. For each preparation question: the answer, the working, the value and its unit.

Functional analysis

2.1 Input / output and symbol table

A stop, emergency-stop or safety limit device is wired NC: at rest the input reads 1, and a broken wire makes it 0.

2.2 GRAFCET

Draw or paste the GRAFCET here (numbered steps, transition conditions written with the symbols, actions to the right of the steps).

One initial step (double square)
Every transition has a condition
Timers are written t/Xi/duration
Stored actions have their reset

GRAFCET approved before programming · Initials

2.3 Internal resources used

Program

/ 6

Attach the ladder listing and the symbol table printed from Micro/WIN. Here, the map of the program: one network per row.

Every network has a title and a comment
Symbols are used everywhere, no bare addresses
Each output is written only once
Safety conditions (stop, limit switches) act outside the steps

Test log

Write the expected result before the test, then what you observe on the bench.

Signed checkpoints

The instructor signs after a group member who did not program the network explains it.

Fault injection

bench / 6

Every fault listed in the lab sheet is really provoked. A fault must stop the machine, never start it.

Discussion

/ 5

Answers to the lab questions

Difficulties met and how you solved them

Possible improvements

Group declaration

We declare that this report and the attached program are our group’s own work. Any outside help (classmates, documents, AI tools) is listed below.

Help and sources used

Signature, member 1

Signature, member 2

Signature, member 3

✓

Marking grid

instructor

Part	What is assessed	Mark
Preparation	I/O table and GRAFCET correct before the session, preparation calculations
Program	Behaviour; symbols, SCR steps, comments
Bench demonstration	Functions shown; every fault-injection test ends in a safe state
Report	Complete, clear, tables filled in and signed, answers justified

Instructor’s remarks