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Applications
Start with the decisionApplications
Vehicle and charging station
EV TestingVehicle, EVCC and charging-release validation.EVSE TestingCharging-station development through field operation.InteroperabilityReal EV and EVSE in one synchronized test record.
Battery, MCS and EMC
BMS TestingCells, sensors, balancing and controlled faults.BMS + EVCC + OBCValidate the interaction of battery, charging controller and on-board charger.MCS TestingCommunication, signals, cooling and megawatt power.EV Charging EMCKeep charging communication observable under EMC stress.
Production, commissioning and calibration
EVSE End-of-LineRepeatable acceptance and unit-level results.Commissioning & Field ServiceCommission, diagnose and verify installed chargers with an EV charger tester.Calibration & MetrologyTraceable energy verification at the charging point.
Products
Start with the decisionProducts & PlatformsProduct Finder
EVCA
EVCA PlatformCommunication, interoperability, high-power, MCS and EMC paths.EVCA ComOnlyFocused charging communication testing.EVCA Multi MobilePortable laboratory and field analysis.EVCA InteropAnalyse interoperability between a real EV and EVSE.EVCA FlexModular high-power testing and controlled faults.EVCA MCSMegawatt charging communication, low-level signals and system testing.
Easy Chester
Easy Chester PlatformEVSE production, commissioning, service and calibration.Easy Chester MicroAC EV charger tester for wallboxesEasy Chester UltimateAC/DC EV charger testerEasy Chester CalimeraAC and DC EVSE calibration systemEasy Chester EOL / EOL HPCEVSE end-of-line production tester
Battery, software and EMC
Battery Cell SimulatorBMS testing from compact bench to high-voltage HiL.SmartCal calibration (accessory)Automated calibration and adjustment of the Battery Cell Simulator.comframeConfiguration, synchronized analysis and automation.EMC LinkOptical charging communication through the chamber boundary.
Software
Start with the decisionSoftware Capabilities
comframe and integration
comframeThe test software for every comemso system.Integration & APIsREST, Python, CI/CD and laboratory orchestration.Protocol & Domain ModulesSelect released domain depth.Capabilities HubConnect the capability model across EV, EVSE and BMS testing.EVCA Capability HubExplore the detailed EV charging capability stack.
Analyse and test
Automated Standards AnalysisMeasured behaviour, normative context and highlighted deviations.Professional SimulationConfigure nominal, boundary and non-conform behaviour.Manipulating GatewayTest a live correction hypothesis between real partners.
Reproduce and automate
Charge PlaybackReproduce the charging partner for the DUT.Charge Cycle AutomationTurn saved configurations into repeatable campaigns.Conformance Test LibrariesVersioned executable standards-based test logic.
Knowledge
Start with the decisionStandards & Knowledge
Standards and test logic
Charging, Safety & EMCCharging behaviour, field safety, editions and test boundaries.Conformance Test LibrariesReleased executable test logic, verdicts and evidence.AFIR for EV ChargingRegulation, responsibility and verifiable evidence.NACS (SAE J3400)Charging communication tests for the North American Charging Standard.UL standards & EVSE field safetyUL requirements and electrical safety checks at installed charge points.
Methods and terminology
Knowledge CenterTechnical explanations, methods and application guidance.GlossaryStable charging and BMS test terminology.EVSE Calibration MethodsCompare controlled real load and reference measurement.Testing a wallboxProcedure, standards, limits and test report for electricians.Battery Cell SimulationCells, balancing, faults, precision and BMS HiL.
Documents and tools
Resources LibraryCurrent brochures, webinars, guides and checklists.BMS testing whitepaperTemperature, environment, simulation and test wiring.EVSE Inspection GuidePractical commissioning and inspection workflow.Charger Uptime CalculatorEstimate downtime and field-service impact.Technical newsletterChoose product updates and events relevant to your tests.
Company
Start with the decisionCompany
Company
About comemsoEngineering purpose, history and operating companies.Development & manufacturingShort paths from development to system testingQuality & CertificationsManagement systems, validation and calibration evidence.Customer ProofNamed stories, endorsements and published configurations.SustainabilityEnvironmental management and measured progress.
People and network
Customer Care TeamDelivery, commissioning, training and support.Sales PartnersRegional commercial and service access.CareersWork on deep e-mobility testing.
Updates and contact
News & EventsProjects, releases, webinars and company updates.Request a technical demoDiscuss your test task with the comemso team.ContactSales, support and locations in one place.

Capability / robustness testing

Test how charging systems handle unexpected messages

Control the simulated EV or EVSE, vary communication parameters and observe responses to communication errors. Alongside CCS PLC simulation, DC-China (GB/T DC) and CHAdeMO Professional Sim offer advanced CAN controls for repeatable robustness tests.

Find your test system Explore the controls
Engineer at a simulation workstation: an EVCA system is connected to a charging controller, message sequences and timing are shown on screen.
ValuesNominal, boundary and non-conform behaviour, configurable
Message contentSuppress or omit supported optional behaviour
TimingMessage-specific delays and timeouts
SequencesChallenge unexpected states and transitions

A simulated charging partner under control

Configure charging behaviour. Keep the sequence in view.

Professional Simulation controls a simulated charging partner. Manipulating Gateway varies communication while the real EV and EVSE stay connected.

Supported parameters are set in an application-focused interface; you see how charging systems handle unexpected messages and changes in the sequence. Customers also use this workflow to understand DIN 70121 and ISO 15118-2/-3 charging processes while developing their own implementation.

Four control domains

Vary values, message availability, timing and sequence

01 / Value

Protocol-specific parameters

For CCS PLC, use valid or invalid DIN 70121 and ISO 15118-2 message parameters within the XML schema ranges.

02 / Presence

Message availability under control

For DC-China and CHAdeMO, configure CAN message loss (CAN loss), including its frequency, to test the DUT response to missing communication. CCS supports suppression or omission of supported optional behaviour.

03 / Timing

Change timing by message

For DC-China and CHAdeMO, set CAN cycle times per message type. For CCS, vary individual-message timing and test responses to defined delays and timeout conditions.

04 / Sequence

Challenge the state machine

State-machine robustness tested in CCS, DC-China and CHAdeMO. Protocol-specific error controls show transitions and recovery. CCS additionally supports injecting messages into the charging sequence.

CAN communication

DC-China and CHAdeMO: Professional Sim for EV and EVSE

Advanced CAN parameters are available in EV and EVSE Professional Sim for both standards, alongside the message-loss and cycle-time controls described above.

Repeatable robustness tests

Change one condition and review the complete response

  1. Define the baseline

    Choose the EV or EVSE test role, charging standard and expected response under normal conditions.

  2. Configure the challenge

    Vary message values, timing or supported additional messages to test a defined behaviour.

  3. Observe the DUT

    Run the scenario and correlate state transitions with communication, pilot signals, voltage and current.

  4. Repeat and compare

    Save the configuration and compare the response with the baseline. Reuse the setup to check software changes.

Example: a delayed response

Change the timing. Understand the reaction.

  1. Record the baselineRun the configured EV simulation against the EVSE and record the response under normal conditions.
  2. Vary the timing of a supported messageSelect a message and change its response delay using the available controls. The selected protocol and release determine the options.
  3. Evaluate the DUT responseReview the timing deviation, subsequent states and measured response with the configured analysis. The results point to the next investigation.
  4. Save and repeatReuse the simulation configuration after a software change and compare the response with the baseline.
See how automated analysis supports evaluation

Development and regression tests

Use Professional Simulation in development, boundary tests and regression

Development

Controller robustness

Validation, recovery and safe-state behaviour are tested early in development, while implementation changes are easier to make.

Integration

Hard-to-reach boundary cases

Timing and sequence conditions that are hard to create reliably, safely or with reasonable effort using real charging partners become reproducible.

Release

Repeatable regression

Save an approved behaviour configuration and rerun it after changes to software, parameters or hardware.

Test configuration

Choose the licence and hardware for your robustness test

DUT role, charging standard and edition, normal partner behaviour and the message or state to vary are defined. Physical signals, electrical test scope, automation target and required records are specified.

Find your test systemDiscuss a scenario

Continue the workflow

Combine simulation, automation and analysis

Selection
Capability Hub

The six EVCA capabilities compared – for the method your engineering task needs.

Repeat
Charge Cycle Automation

Saved configurations return in repeatable charging campaigns.
Results
comframe

Tests are configured, signals measured, events correlated and reports created in the shared software environment.

Frequently asked questions

Professional Simulation FAQ

Is this the same as a Conformance Test Library?
No. Professional Simulation creates configurable partner behaviour for robustness tests. A Test Library runs released standards-based test cases with defined verdict logic. The methods complement each other.
Does every test require programming?
No. Configure supported values, timing and sequences in the daily workflow. Open interfaces support advanced integration and external orchestration.
Can it test both EV and EVSE implementations?
Yes. DC-China (GB/T DC) and CHAdeMO each offer Professional Sim for EV and EVSE roles. Select the system, charging interface and software configuration for the required protocol and test direction.
Can configured behaviour be automated?
Use saved configurations in repeatable campaigns when integration with Charge Cycle Automation is released for the selected setup.
What should be supplied for configuration?
Provide the DUT role, protocol and edition, normal behaviour and intended variation. Include the physical interface, electrical test scope, evidence needed, automation target and required release status.

Controlled partner behaviour

Define the behaviour for your test

Simulated role, standard, value, timing or sequence variation and the response to measure are described.

Find your test systemRequest a 15-minute demo