- What "Exam Dates" Really Means for C-309
- How C-309 Is Delivered: Silver, Gold and the SACA Portal
- Scheduling Mechanics: Portal, Centers and Membership Access
- What We Could Not Verify About 2026 Windows
- Backward Planning From the Six C-309 Objectives
- A Domain-Sequenced Prep Timeline
- Planning Around the Gold Hands-On Assessment
- Pre-Booking Checklist
- Frequently Asked Questions
- C-309 is Programmable Controller Systems 2, offered through the Smart Automation Certification Alliance (SACA), not through a fixed national test calendar.
- Silver is a proctored online written exam via the SACA portal at participating centers; Gold adds an observed hands-on assessment.
- Gold requires Silver first, so schedule the written exam well ahead of any practical session.
- Exact question count, time limit, retail fee and retake rules were not verified; confirm them with your center.
What "Exam Dates" Really Means for C-309
Many certification candidates expect a published calendar of fixed national testing days. For Programmable Controller Systems 2 (C-309), that expectation can lead you astray. C-309 is a Smart Automation Certification Alliance (SACA) credential delivered through participating centers, and the practical question is rarely "what day is the exam?" but rather "when can my center proctor it for me?"
This article focuses on what can be said responsibly about scheduling C-309 in 2026: how the credential is delivered, how registration flows through the SACA portal, which pieces of information are still unconfirmed, and how to build a preparation timeline that works backward from whatever date your center offers. If you are still orienting yourself to the credential itself, start with What Is C-309 Certification? and then return here.
How C-309 Is Delivered: Silver, Gold and the SACA Portal
SACA structures its smart automation certifications in tiers, and that structure directly shapes how you schedule. For C-309, the delivery model has two levels:
| Level | Format | Scheduling implication |
|---|---|---|
| Silver | Proctored online written exam through the SACA portal, taken at participating centers | Book through your center; you need a proctor and a seat, not a national test date |
| Gold | Requires Silver, plus an observed hands-on assessment using SACA-approved equipment | Needs both a passed Silver result and access to approved equipment and an observer |
The tier distinction matters for planning. A written exam can often be arranged relatively flexibly, while a hands-on assessment depends on equipment availability and an observer being present. If you are aiming for Gold, your scheduling problem is really two scheduling problems in sequence. For a deeper look at what the credential covers and why the tiers exist, see C-309 Certification.
Why "proctored online" does not mean "any time at home"
The Silver exam is described as proctored online through the SACA portal at participating centers. That phrasing is important: the testing is online in delivery format, but it is still tied to participating centers and a proctoring arrangement. Do not assume you can sit the exam on demand from your kitchen table. Confirm with your center exactly where and how the proctored session will run, including identification and technical requirements.
Scheduling Mechanics: Portal, Centers and Membership Access
Three pieces of infrastructure govern how you get from "I want to test" to "I have a confirmed session."
- The SACA portal. Registration help is published on the SACA portal, and the exam is accessed through it. Create your account early so that account issues never become the bottleneck on test week.
- A participating center. Because delivery occurs at participating centers, your center sets practical availability. Colleges and training centers that offer SACA certifications are the usual route.
- Membership benefits. SACA's education and industry membership programs provide certification access for eligible enrolled students and for employees of member companies. These benefits are distinct from tuition, equipment, or local center charges, so a student or employee may find the exam itself covered while local fees still apply.
Prerequisites and eligibility are separate questions
Candidates sometimes conflate "when can I test" with "am I allowed to test." College courses in a degree pathway, such as a course sequence that leads into C-309 topics, may have their own prerequisites, but those are not verified as issuer-wide admission requirements for the credential. Check your center's rules, and read C-309 Requirements for the eligibility picture as far as it can be established.
What We Could Not Verify About 2026 Windows
Transparency is more useful than false precision. The following details were not verified and should be confirmed directly with your center or the SACA portal before you commit to a date:
- The exact number of written questions on the Silver exam.
- The time limit for the written exam. Course hours and practical-assessment time are not a written-exam timer, so do not infer one from them.
- The individual retail exam fee.
- A universal pass mark, plus retake and renewal rules.
- Any fixed national testing windows or registration cutoffs for 2026.
Because the pass mark is unconfirmed, our C-309 Passing Score and C-309 Pass Rate articles stay deliberately qualitative. The same discipline applies here: if a source gives you a precise number without citing SACA or your center, be skeptical.
A scope note worth knowing
Some SACA announcements and occupational listings describe a C-309 record in terms of Ethernet communications. The preparation material we reviewed for this site reflects analog instructions, PLC program control, subroutines, and HMI projects instead. Because this mismatch could not be resolved from available sources, confirm with your center which content version your exam session will use before you finalize a study plan. The six-objective breakdown below reflects the reviewed preparation curriculum, not a verified exhaustive current exam blueprint.
Backward Planning From the Six C-309 Objectives
Since your exam date will be set by your center rather than a national calendar, the smartest scheduling move is to plan backward. Once you have a confirmed session, divide the preparation time across the six preparation-curriculum objectives. These are unweighted in the sources we reviewed, so no domain should be assumed to carry more points than another. The full breakdown lives in C-309 Exam Domains: Complete Guide to All 6 Content Areas, but here is how they translate into scheduling decisions.
Domain 1: Program and operate a PLC logic program that uses analog instructions
The foundation for the rest of the credential. Analog work means scaling, comparison and math instructions applied to variable signals instead of simple on/off bits.
- Understand how raw analog input values map to engineering units.
- Practice writing and running logic that responds to analog thresholds.
- Schedule this first because Domain 2 depends on it.
Domain 2: Troubleshoot a PLC program application that uses analog I/O
Troubleshooting is a distinct skill from writing logic. You must diagnose why an analog application misbehaves, such as scaling errors, wiring or configuration faults, or logic that mishandles a signal range.
- Build a habit of checking scaling and signal range before suspecting the program.
- Practice fault-finding on programs you did not write yourself.
Domain 3: Program and operate a PLC logic program that uses program control instructions
Program control instructions alter the normal flow of scan execution. Learn what each does to the scan and the risks of misusing them.
- Trace how execution order changes when control instructions are active.
- Predict behavior before running the program, then verify.
Domain 4: Program and operate a PLC logic program that uses subroutine instructions
Subroutines organize logic into callable units. Candidates should understand how a program calls, executes, and returns from them.
- Structure a program into a main routine plus subroutines.
- Recognize call and return behavior when reading unfamiliar code.
Domain 5: Program and operate an HMI project that uses objects to interact with a PLC
This shifts from ladder logic to the operator interface. HMI objects such as buttons, indicators and displays are tied to PLC tags so operators can monitor and control the process.
- Link HMI objects to the correct PLC data.
- Verify that operator actions produce the intended PLC response.
Domain 6: Program and operate an HMI project that uses information, diagnostic and alarm messages
The HMI is not just buttons; it also communicates status. Information, diagnostic and alarm messages tell operators and maintenance staff what is happening and what has gone wrong.
- Distinguish informational, diagnostic and alarm message purposes.
- Configure messages that trigger from PLC conditions.
A Domain-Sequenced Prep Timeline
Here is the one place where we offer a study cadence, and it is tied specifically to the C-309 domain order rather than generic advice. The logic: analog fundamentals first because troubleshooting builds on them, PLC flow-control topics next, and HMI last because HMI projects reference PLC tags you should already understand. Adjust the number of weeks to match however much runway your center's session date gives you.
Analog programming (Domain 1)
- Review analog input and output handling and scaling concepts.
- Write several small programs that react to analog values.
Analog troubleshooting (Domain 2)
- Practice diagnosing broken analog applications.
- Build a repeatable checklist: signal, scaling, configuration, logic.
Program control and subroutines (Domains 3 and 4)
- Study scan-flow effects of program control instructions.
- Refactor a program into subroutines and trace the calls.
HMI objects and messages (Domains 5 and 6)
- Bind HMI objects to PLC tags and test operator interaction.
- Configure information, diagnostic and alarm messages.
Integration and review
- Take full-length practice questions across all six domains.
- Revisit your weakest domain based on results.
For a fuller methodology and how to adapt it to your background, see the C-309 Study Guide. If you want a compact refresher for the last few days before testing, the C-309 Cheat Sheet condenses must-know facts onto a single page.
Key Takeaway
Do not let the unconfirmed calendar stall your preparation. The six domains are stable enough to start studying now. Book the earliest session your center can reasonably offer after you have completed one full pass through all six objectives, then use the remaining time for practice questions and weak-area review.
Planning Around the Gold Hands-On Assessment
If you intend to pursue Gold, scheduling gets more involved. The credential requires Silver plus an observed hands-on assessment using SACA-approved equipment. That introduces constraints a written exam does not have:
- Sequence: Silver must come first. Do not book the practical until the written result is in hand and recognized.
- Equipment: The assessment uses SACA-approved equipment, so your center must have it available and free on your date.
- Observer: The assessment is observed, meaning a qualified person must be present to evaluate your work.
- Timing is not the written timer: Practical assessment time is separate from any written-exam time limit and should not be conflated with it.
Practically, the hands-on component is where the six domains come alive. You are likely to be asked to program and operate a PLC application, work with analog signals, and interact with an HMI. Hands-on repetition matters more than extra reading in the final weeks before a practical. If you are weighing whether the additional effort of Gold is worth pursuing, the C-309 ROI analysis and the C-309 jobs overview discuss the career side of that decision.
Pre-Booking Checklist
Before you commit to a session, gather the following answers from your participating center. Having them in writing prevents surprises later.
- Which tier? Confirm whether you are scheduling Silver only or planning toward Gold.
- Which dates? Ask for the next several available proctored sessions, not just the soonest one.
- Which content version? Given the scope note above, ask which objectives your session covers.
- What does it cost locally? Separate the exam access, which membership may cover, from tuition, equipment or center charges.
- What are the retake terms? Retake and renewal rules were not verified, so get them directly from the center or portal.
- What are the technical and ID requirements? Proctored online delivery typically has setup rules; learn them well before test day.
If you want a low-pressure way to gauge readiness before you book, try our C-309 practice tests to see which domains need attention. Candidates who also want a realistic read on difficulty can consult How Hard Is the C-309 Exam? before choosing a date.
Frequently Asked Questions
We could not verify a universal calendar of national testing dates. C-309 is delivered through SACA's portal at participating centers, so your session date generally depends on your center's availability. Confirm directly with the center or the SACA portal.
The Silver exam is a proctored online written exam delivered through the SACA portal at participating centers. That means it is online in format but tied to a proctoring arrangement, so it is not an unrestricted on-demand test. Ask your center how sessions are run.
Yes. Gold requires Silver plus an observed hands-on assessment using SACA-approved equipment. Plan your written exam first, and schedule the practical only after you have the Silver result.
The exact question count and time limit were not verified. Course hours and practical assessment time are not a written-exam timer, so do not infer one from them. Ask your participating center for the current parameters.
SACA education and industry memberships can provide certification access for eligible enrolled students and member-company employees, separate from tuition, equipment or local center charges. If your access runs through a school or employer, session timing may follow their arrangements. Individual retail pricing was not verified, so check the C-309 cost breakdown and confirm with your center.
If you are comparing this credential's meaning and scope against similar-sounding acronyms, our explainer on what C-309 is clarifies that this site refers specifically to Programmable Controller Systems 2. Once you have a confirmed session, work backward through the six domains, and use the C-309 exam dates hub as your reference point for scheduling questions as official details become available.