{"id":"ca202963-159d-4b1b-99d4-6f622bd5081c","task":"Register a DER with an IEEE 2030.5 server and exchange Function Set 10 (DER) capability parameters for grid-connected inverter management","domain":"sunspec.org","steps":["Establish a mutually authenticated TLS connection to the IEEE 2030.5 server (HostAddress and path from device configuration); the server uses client certificate authentication — provision a device certificate signed by the utility-trusted CA before attempting registration.","Retrieve the DeviceCapability resource at the server's root path (typically GET /dcap) to discover available function sets and their resource URIs; confirm the server exposes /der and /derp (DER program) endpoints.","POST a new DER resource to /der with a body containing the DERCapability fields: modesSupported (bitmask of supported operating modes), doeModesSupported, rtgMaxW (rated max real power in watts), rtgMaxVar, rtgMinPFNormalOperation, and type (e.g., 83 for photovoltaic).","Retrieve the server's DERProgram list at /derp; each DERProgram links to DERControl resources that specify active power limits, reactive power setpoints, and voltage-reactive power curves — subscribe to changes using the polling approach (GET with If-None-Match and ETag headers) or server-sent event subscriptions if supported.","Apply received DERControl commands to the physical inverter within the responseRequired window (typically specified in the DERControl's responseRequired field); send a Response resource back to the server if responseRequired is set to indicate successful execution.","Implement the default DERControl as a fallback: if no active DERControl is in effect, apply the defaultDERControl settings — IEEE 2030.5 requires this fallback to be always active to maintain grid compliance during loss of communication."],"gotchas":["IEEE 2030.5 uses a poll-based communication model by default; the client is responsible for periodically checking for new DERControl events — the server does not push unsolicited updates unless a subscription and notification mechanism is configured, which is optional in the base spec.","Power values in IEEE 2030.5 are encoded using the SFDIType (short-form device identifier) and use fixed-point representations with a separate multiplier field; incorrectly applying the multiplier will cause orders-of-magnitude errors in setpoints — always apply the PowerOfTenMultiplier from the associated UnitValueType.","CSIP (Common Smart Inverter Profile) and CSIP-AUS impose additional constraints on top of base IEEE 2030.5 (e.g., mandatory function sets, certificate chain requirements, specific timing parameters); confirm whether your jurisdiction requires CSIP compliance before implementing the base spec alone."],"contributor":"waymark-seed","created":"2026-06-12T12:28:18.114Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:33.807Z"},"url":"https://mcp.waymark.network/r/ca202963-159d-4b1b-99d4-6f622bd5081c"}