- What the FPABS Credential Actually Is
- Who Runs It: Festo and NC3
- Allen Bradley vs. Siemens: Two Separate Exams
- The 14 Preparation Topics
- Skills to Master First: Relays, I/O, Memory and Scanning
- Numbering Systems and Boolean Logic
- Programming, HMI, Networks and Troubleshooting
- Passing Score vs. Pass Rate
- Cost and Registration Mechanics
- Sequencing Your Preparation Around the Topics
- Where the Credential Fits in Careers
- Comparing Other PLC Credentials
- Frequently Asked Questions
- FPABS here means Fundamentals of PLCs, Allen Bradley/Siemens: a Festo Level 1 credential delivered through NC3.
- Allen Bradley and Siemens are separate exam records, not one combined test.
- The passing threshold is at least 70%; that is a cut score, not a pass rate.
- NC3 charges students US$0 for certification; training tuition and school fees are separate.
What the FPABS Credential Actually Is
On this site, FPABS refers to one thing only: Fundamentals of PLCs - Allen Bradley/Siemens. It is an entry-level industry certification in the Festo Industry Certification Program (FICP), positioned at Level 1 Fundamentals. It verifies that a student understands the core concepts of programmable logic controllers and has completed hands-on lab work with either an Allen Bradley or a Siemens platform.
If you are new to the acronym itself, the explainers on what FPABS is, what FPABS stands for and what FPABS certification means cover the naming in detail. This article focuses on how the certification works in practice and what you need to know to prepare.
Who Runs It: Festo and NC3
Two organizations matter here, and they play different roles:
- Festo is the governing body. It publishes the Festo Industry Certification Program and the curriculum documents that define what students are trained on.
- National Coalition of Certification Centers (NC3) is the administering and testing partner. Exams are delivered through participating institutions and NC3Certs, typically by schools whose instructors are actively NC3-certified.
This structure has a practical consequence: you generally do not register for this exam the way you would for a vendor test at a public testing center. Access runs through a participating school or training provider. Details on that process are covered in the FPABS requirements guide, and scheduling specifics are in the FPABS exam dates article.
Allen Bradley vs. Siemens: Two Separate Exams
The slash in the name matters. Allen Bradley and Siemens are two platform variants, each with its own curriculum document and its own examination record. Festo publishes separate preparation documents for each: document 272391 for Allen Bradley and document 272390 for Siemens, both dated EN 2025.09.
| Item | Allen Bradley | Siemens |
|---|---|---|
| Festo curriculum document | 272391 (EN 2025.09) | 272390 (EN 2025.09) |
| Preparation topics | Same fourteen headings | Same fourteen headings |
| Training structure | 6 units, 5 labs, 1 project | 6 units, 5 labs, 1 project |
| Virginia CTE listing | Separate record, 50 test items | Separate record, 50 test items |
| Exam record | Its own | Its own |
Two points that trip people up. First, the six units, five labs and one project are training components, not an exam timer and not a requirement to complete both platforms. Second, the Virginia listings describe two platform-specific tests of 50 items each, not a single combined 100-question exam. Choose the platform your program teaches and prepare for that one.
The 14 Preparation Topics
Festo's current Allen Bradley and Siemens documents publish the same fourteen preparation-topic headings. They are reproduced below as issuer curriculum topics. They are unweighted and are not a verified formal exam blueprint, and no official percentage weights were verified. For a deeper walkthrough, see the FPABS exam domains guide.
- Control relays
- Communication protocols
- Programming techniques
- HMI integration
- Networks
- Basic design and operation
- PLC sections: input, logic and output
- Input types: discrete, analog and digital
- Memory types: ROM and RAM
- Logic processing: addressing and scanning
- Output types: discrete, analog and digital
- Numbering systems: decimal, binary, octal, hex and ASCII
- Boolean functions: identity, AND/OR/NOT circuits
- Basic troubleshooting: using a PLC as a troubleshooting tool
Because the list is a curriculum outline rather than an exam blueprint, treat every topic as fair game and avoid betting your preparation on a guess about which ones are "worth more."
Skills to Master First: Relays, I/O, Memory and Scanning
Several topics form the physical and architectural foundation. Later material on ladder logic makes little sense until these are solid.
Control Relays
PLCs replaced relay panels, so relay behavior is the conceptual root of ladder logic.
- Coil versus contact behavior, and normally open versus normally closed contacts
- How a hardwired seal-in (latching) circuit works, since ladder rungs mimic it
- Why relay logic became a PLC program
PLC Sections and Basic Design
Know the three-part flow: input, logic, output.
- What each section does and where signals enter and leave
- How the processor, power supply and I/O modules relate
- What "basic design and operation" means when you read a simple system description
Input and Output Types
Expect to classify devices and signals correctly.
- Discrete: on/off devices such as pushbuttons, limit switches and indicator lamps
- Analog: continuously varying signals such as pressure or temperature measurements
- Digital: data-style signals, distinguished from simple discrete on/off states
- A good drill: list ten shop-floor devices and label each as a discrete, analog or digital input or output
Memory Types: ROM and RAM
Understand the purpose of each memory type, and what happens to its contents when power is lost.
- ROM-type memory holds permanent or system-level information
- RAM-type memory holds working data and program content that can change
- Be able to explain why a PLC needs both
Addressing and the Scan Cycle
This is where PLC thinking differs most from ordinary software.
- The scan sequence: read inputs, execute logic, update outputs
- Why an input that changes mid-scan is not seen until the next scan
- How addresses map program elements to physical or internal data
- Note: Allen Bradley and Siemens label addresses differently, so keep your platform's notation straight
Numbering Systems and Boolean Logic
These two topics reward practice more than reading. A short daily conversion habit pays off.
Numbering systems
The curriculum names decimal, binary, octal, hexadecimal and ASCII. Practice converting small values among them by hand, and know what ASCII is used for (representing characters as numeric codes). A self-made drill: pick any decimal number from 0 to 255, write it in binary, then group the bits to reach hex, and check by converting back.
Boolean functions
Identity, AND, OR and NOT are the building blocks. Be comfortable with:
- Completing a truth table for each function from memory
- Translating a Boolean expression into a ladder rung: series contacts for AND, parallel branches for OR, a normally closed contact for NOT
- Reading a rung and stating its Boolean expression in words
Key Takeaway
Build one "translation chain" for every practice example: plain-language condition, Boolean expression, ladder rung. If you can move between all three without hesitation, a large share of the logic topics becomes routine.
Programming, HMI, Networks and Troubleshooting
The remaining topics tie the controller to the larger system.
Programming Techniques
Basic ladder logic and the techniques that make programs behave predictably.
- Latching and unlatching, interlocks and simple sequencing
- How rung order affects results given the scan cycle
- Reading a short program and predicting which outputs turn on
HMI Integration
The human-machine interface gives operators visibility and control.
- What an HMI displays and what operator actions it can send to the PLC
- How HMI tags relate to PLC data
Communication Protocols and Networks
Two separate topics that candidates often blur together.
- Protocols: the rules by which devices exchange data
- Networks: the physical and logical structure that connects controllers, I/O and HMIs
- Know the vocabulary your platform uses, and avoid assuming one manufacturer's terms apply to the other
Basic Troubleshooting
The curriculum frames the PLC itself as a diagnostic tool.
- Reading status indicators and online rung states to locate a fault
- Separating input-side, logic-side and output-side problems
- A reliable habit: confirm the field device, then the I/O point, then the program logic
For the broader question of how demanding these topics feel in practice, the FPABS difficulty guide discusses what tends to challenge candidates most.
Passing Score vs. Pass Rate
Candidates frequently confuse these, and search results often blur them too.
- Passing score: The student requirement is an exam score of at least 70%. Virginia CTE listings for both platforms also show a 70% passing score. See the FPABS passing score article for the full picture.
- Pass rate: No current issuer-wide pass rate was verified, so any specific percentage you see quoted deserves skepticism.
Timing is also instructor-dependent. No fixed national written-exam timer was verified, and the Virginia listings describe school-administered online delivery with instructor-determined timing. Proctoring and open-book or closed-book allowances are set at the school level for each exam, so ask your instructor rather than assuming.
Cost and Registration Mechanics
The cost picture has two layers, and mixing them up leads to wrong budgets.
| Cost layer | What the sources show |
|---|---|
| NC3 student certification charge | US$0 per NC3's participation-level comparison (printed version 2026 - 0526) |
| Virginia CTE listings | No cost per test for both platform records |
| Training tuition and institutional charges | Separate, and set by your school or provider |
One institutional example: Virginia Western's bundled PLC/Sensors course lists estimated tuition of US$999, covering online resources, lab equipment, software and the credentialing exam. That course covers the Allen Bradley branch, not Siemens, and its tuition is a course price rather than an exam fee. Its own pages also disagree on duration, giving eight weeks in the introductory text and four weeks in the cost table, so verify with the college. The local Electricity prerequisite is that school's rule, not a universal Festo requirement.
Student requirements, according to NC3 materials, include training by an actively NC3-certified instructor using required equipment, completion of all hands-on labs, and a score of at least 70%. Student recertification is not required. Instructor-side rules should not be assumed to apply to students. For the full pricing discussion, see the FPABS certification cost breakdown, and for training pathways see FPABS training.
Sequencing Your Preparation Around the Topics
Rather than a generic schedule, order your study by dependency: you cannot trace a scan cycle without understanding I/O, and you cannot write ladder logic without Boolean fundamentals. The timeline below is one reasonable approach for a candidate who is also completing the five labs. For a fuller plan, the FPABS study guide goes deeper.
Hardware foundations
- Control relays, PLC sections, basic design and operation
- Input and output types: classify real devices
Memory, scanning and number systems
- ROM and RAM, addressing and the scan cycle
- Daily conversion drills across decimal, binary, octal, hex and ASCII
Logic and programming
- Boolean truth tables, then ladder translation
- Programming techniques tied to your platform's labs
Systems and diagnosis
- HMI integration, communication protocols and networks
- Troubleshooting scenarios, then mixed review across all fourteen topics
When you reach mixed review, use the FPABS practice test to expose weak topics, and keep the FPABS cheat sheet handy for last-minute fact checks. Stick to original practice material; leaked questions are unreliable and unethical.
Where the Credential Fits in Careers
This is an entry-level credential that signals foundational PLC literacy. It suits students in industrial maintenance, electrical, mechatronics and automation programs, and it can support applications for roles involving machine operation, maintenance and controls support. Role-specific listings and employer types are collected in the FPABS jobs article.
On pay, be careful. The U.S. Bureau of Labor Statistics reports a May 2025 median annual wage of US$73,900 for electro-mechanical and mechatronics technologists and technicians. That figure describes the occupation overall. It is not a salary for holders of this certificate, not a starting wage and not a measured certification premium. The FPABS salary guide and the worth-it analysis discuss how to think about value without claiming a proven raise.
Comparing Other PLC Credentials
You may encounter other PLC training paths while researching. They are separate programs, not substitutes for the Festo/NC3 syllabus:
- Rockwell Automation offers certificate programs, including the Logix Programmer Certificate.
- Siemens offers SCE US certificates and badges, including an SCE TIA Portal Basics badge issued through SITRAIN Siemens Digital Industries Learning.
These are vendor-run training paths with their own issuers and content. If your goal is the Festo Level 1 credential, study from the Festo curriculum for your platform rather than from these programs' materials. Not sure which path suits you? Start with the basics on FPABS certification and see how it maps to your program.
Frequently Asked Questions
No. Each platform has its own curriculum and its own examination record. The 6 units, 5 labs and 1 project belong to each platform's training, and there is no combined requirement to pass both. Take the one your program teaches.
NC3 student requirements specify a score of at least 70%, and the Virginia CTE listings for both platforms show the same threshold. That is a passing score, not a pass rate, and no current issuer-wide pass rate was verified.
Not verified nationally. The Virginia listings show 50 items per platform with school-administered online delivery and instructor-determined timing, but other institutions may differ. Confirm with your instructor.
NC3's student certification charge is US$0. Your school or training provider may still charge tuition or institutional fees, so ask what your course price includes.
No official percentage weights were verified. The fourteen headings come from Festo's preparation curriculum, not from a published exam blueprint, so prepare across all of them rather than favoring a few.