USA Banner
  U.S. flag
              An official website of the United States government Here's how you knowOfficial US Government Icon
              **Official websites use .gov**A **.gov** website belongs to an official government organization in the United States.
            Secure Site Icon
              **Secure .gov websites use HTTPS**
                  A **lock** ( A locked padlock ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. 
 U.S. Department of Transportation Icon United States Department of Transportation
 Search DOT
            Search
                        About FMCSAAbout FMCSA
  

        
              Who We Are
                Mission
                Leadership
                Speaker Request Form
                Field Offices
                Policy
                Career Center
                Contact UsResources
  

        
              Frequently Asked Questions
                Grants
                FMCSA Advisory Committees
                Resources for State and Local Partners
                Reports to Congress
                National Training Center
                Motor Carrier Safety Planner
                Information Systems Overview
                ITD
                PRISM
                Your Roads. Their Freedom. (Stop Human Trafficking)RegulationsRegulations, Rules, & Notices
  

        
              FMCSA Guidance
                Regulations and Interpretations
                Rulemakings Documents
                Federal Register NoticesEnforcement
  

        
              Adjudication Decisions
                Civil Penalties
                Uniform Fine AssessmentTopics
  

        
              Medical
                National Registry of Certified Medical Examiners
                Exemptions
                Petitions for Rulemaking
                Petitions for Reconsideration
                Drug & Alcohol Testing
                Hours of Service
                New Entrant Safety Assurance Program
                Electronic Logging Devices (ELD)
                ADA Requirements for Over-the-Road Bus Companies
                Cargo SecurementRegistrationRegistration
  

        
              Do I Need a USDOT Number?
                Daily Register / Certificates / Letters
                Learn About Registration RequirementsMain Menu - Registration - Registration 2
  

        
              Apply for a New USDOT Number and/or Authority
                Update My USDOT Number and/or Authority
                FMCSA Contact CenterCDLCommercial Driver's License
  

        
              Licensing Overview and Resources
                Military Driver ProgramsMain Menu - CDL - CDL 2
  

        
              Safe Driver Apprenticeship Pilot (SDAP)
                State ResourcesSafetyMain Menu - Safety -1
  

        
              Passenger Carrier and Bus Safety
                Our Roads, Our SafetyR
                Household Goods - Protect Your Move
                Report a Violation
                Company Safety Data
                CertificationMain Menu - Safety -2
  

        
              International Safety
                Hazardous Materials Safety
                Driver Safety
                Carrier Safety
                Bicyclist and Pedestrian Safety
                Coercion/HarassmentResearchAnalysis, Research, & Technology
  

        
              Overview
                Tech-Celerate Now
                Crash Causal Factors Program (CCFP)
                Active Research Projects
                Reports and PublicationsData and Statistics
  

        
              Safety Progress Report
                Pocket Guide to Large Truck and Bus Statistics
                Large Truck and Bus Crash FactsNewsNews
  

        
              Newsroom
                Emergency Declarations
                Press Releases and AnnouncementsConnect with us
  

        
              FMCSA on Facebook
                FMCSA on Handshake
                FMCSA on Linkedin
                FMCSA on Medium (Blog)
                FMCSA on X (formerly Twitter)
                FMCSA on YouTube
                DOT on YouTubeMenu Home
                        Regulations
                        Hours of Service
                        ELDSIn This Section
        Electronic Logging Devices
                Implementation Timeline
                Drivers and Carriers
                Manufacturers
                Enforcement Partners
                Resources
                Equipment Registration
                Agricultural Commodity
                Personal Conveyance
                ELD Support
      
   Tags
            395
                                                                ELD
      
      
      
        FMCSA ELD Information Line
      1200 New Jersey Avenue SEWashington, DC 20590United States
      
          
    **Email:**ELD@dot.gov**Phone:** 800-832-5660
    If you are deaf, hard of hearing, or have a speech disability, please dial 7-1-1 to access telecommunications relay services.
                
                In an electronic logging device (ELD) with multiple components, which component must generate the event sequence identifier number?
		

		
		
					
							
		
					
  Document
              FMCSA-ELD-395-Q080(2023-07-31).docx (26.02 KB)

		
					**NOTE: This guidance revises FMCSA-ELD-395-Q080(2022-03-10), issued on March 10, 2022, and rescinded on July 31, 2023.**

FMCSA-ELD-395-Q080(2023-07-31)

**Question:** In an electronic logging device (ELD) with multiple components, which component must generate the event sequence identifier number?

**Guidance:** The event sequence identifier number (sequence ID) must be consistently applied as required per section 4.4.4.1 of 49 CFR part 395, subpart B, Appendix A. While the component(s) used to generate the sequence ID is not specified and is left to the discretion of the provider, *section 4.4.4.1 requires the sequence ID to be assigned at the time the event is recorded. ELD events must be recorded when they occur, not at a later time using cached data*. [Clarification italicized].

**Contact Info:** FMCSA ELD Information, 1-800-832-5660 or ELD@dot.gov.
________________________ 
 *Note: This guidance document does not have the force and effect of law and is not meant to bind the public in any way.  It is intended only to provide information and clarity regarding existing requirements under the law or agency policies.*
		
		

    			
  Regulatory Topic:
                  ELD Guidance

		
		
    
					Effective Date: Monday, July 31, 2023Issued Date: Monday, July 31, 2023 U.S. DEPARTMENT OF TRANSPORTATION

**Federal Motor Carrier Safety Administration**

1200 NEW JERSEY AVENUE, SE

WASHINGTON, DC 20590

1-800-832-5660Subscribe to email updates
                    About
  

        
              About FMCSA
                Regulations
                Safety
                Analysis
                FMCSA PortalNews and Events
  

        
              FMCSA Newsroom
                Press Releases
                Emergency DeclarationsResources
  

        
              Career Center
                Resources for Carriers
                Resources for Consumers
                Resources for Drivers
                Forms
                Contact Us
                Trending TopicsPolicies, Rights, Legal
  

        
              About DOT
                Budget and Performance
                Civil Rights
                FOIA
                Information Quality
                No FEAR Act
                Office of Inspector General
                Privacy Policy
                Vulnerability Disclosure Policy
                USA.gov
                Web Policies and Notices
                Web Standards