Multimeter and PLC simulators for automation and electrical work
Practise with a multimeter and a PLC without any risk, learn the fundamentals of PLC programming and solve everyday calculations for the panel and the plant floor. Made by a technician from the industry for students, apprentices and technicians who are starting out.
See the toolsTools for the job
Simulators and calculators for everyday work in the panel and on the plant floor, each with its formula or an explanation of every case. Free and with no sign-up: everything runs in your browser.
Multimeter simulator
Measure voltage, resistance, continuity and current on a three-phase supply and a 24 V control circuit. Make the classic mistakes safely and find faults.
Ladder logic simulator (LAD)
Press the buttons and watch the power flow through the rungs, scan by scan: seal-in, interlock, TON, CTU, double coil and set/reset.
4–20 mA converter
Convert mA to bar, °C, metres or any unit, and back. Flags signals that are out of range.
Siemens analog scaling (0–27648)
Convert the raw value of an S7-1200 or S7-1500 analog module into engineering units, and back.
Ohm’s law and power calculator
Enter any two values and get the other two: voltage, current, resistance and power.
OEE calculator
Availability, performance, quality and OEE of a machine, and where the biggest loss is.
Automation payback calculator
Work out how long an automation project takes to pay for itself and the cumulative result over several years.
Learning topics
From PLC programming fundamentals to commissioning, robotics and deciding whether automation pays off, each with clear theory, diagrams and a practice test with explained answers.
Boolean logic for PLCs
AND, OR, NOT, De Morgan and why a stop button is wired normally closed.
The PLC scan cycle
Process image, cycle time and the mistakes only people who do not understand it make.
Ladder logic (LAD) in TIA Portal
Contacts, coils, set/reset, edges, timers and counters.
Structured Text (SCL)
IF, CASE, loops and reusable blocks in Structured Text.
GRAFCET and sequences
Steps, transitions, branches and how to implement them in a PLC.
Good vs bad PLC programming
Structure, names, comments and the mistakes that give away a badly made program.
Industrial communications
PROFINET, Modbus, IP addressing and network troubleshooting.
Commissioning with the programmer
Checking inputs and outputs, forcing and troubleshooting with the programmer on the phone.
Industrial robotics
Types of robot, coordinate systems, safety and cobots.
Systems integration: is automation worth it?
How to decide whether automation pays off for a company: costs, savings, risks and alternatives.
Why simulators
Make the mistakes here
Measure amps across the mains, leave the lead in the wrong jack or use the wrong range: the simulator shows what would happen, with no risk.
See inside the PLC
The ladder simulator runs a real scan cycle, so you can watch when each contact, coil, timer and counter changes.
Find faults
Surprise faults in a 24 V control circuit teach the point-to-point method used on real machines.
Full course in Spanish
ExamRobotic also has a complete course in Spanish: 18 topics and 694 practice questions on electrical work, PLC programming, robotics and more. Visit the Spanish site. More English topics are being added.