What the data for this category looks like
Ledger data for rolling stock equipment comes from on-board collection terminals of train running gear, braking systems, and traction systems, as well as paper or electronic inspection and maintenance records submitted by operation and maintenance teams. Update frequency falls into two categories: real-time operating data is synchronized every 10 seconds, while monthly/annual summary ledgers are updated once daily. The data uses a standardized JSON structure, with core fields including equipment ID, component name, cumulative operating duration (unit: hours), maintenance count (unit: times), last maintenance date, and number of fault records. Some fields must be associated with original collection values from on-board sensors, and there is no redundant unstructured content.
What constraints these characteristics impose on the "HTTP Interfaces and External Systems" link
The high-frequency updates of real-time operating data require that the interface polling interval must not exceed 10 seconds, otherwise the latest equipment operating status cannot be obtained. The structured fixed fields require that core fields must be accurately filtered when the interface returns data to avoid transmitting redundant data. Multi-dimensional filtering requirements for rolling stock equipment ledgers require that external systems carry query parameters such as equipment ID and time range when calling the interface, so the interface configuration must support passing filtering conditions. In addition, the volume of single-batch ledger data is large, so the interface must support paged queries to avoid request timeouts.
How to set the configuration
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
Authorization | Bearer {replace with the API key generated by FastGPT v4.17.0} | Follow the platform's interface authentication specifications to ensure valid requests |
responseData | ["equipmentId", "componentName", "runHours", "maintainCount", "lastMaintainDate"] | Only return core fields of rolling stock equipment ledgers to reduce invalid data transmission |
| Single request data volume | Top 100 entries | Adapt to the reasonable scale of single-batch ledgers to avoid request timeouts |
| Interface timeout period | 600 seconds | Cover the conventional time consumption of data summarization and cleaning, and adapt to the processing cycle of rolling stock equipment ledgers |
variables | {"equipmentType": "EMU", "queryDateRange": ["2024-05-01", "2024-05-31"]} | Pass precise filtering parameters to meet the multi-dimensional query requirements of rolling stock equipment ledgers |
Three common mistakes
- An "event parameter is undefined" error is returned when calling the interface. The cause is that the value of the event field is not configured in
variables, and the parameter specifications in the interface documentation are not followed. - Ledger data fields are missing in the interface return. The cause is that the fields configured in
responseDatado not match the actual structure of the rolling stock equipment ledger, and core fields such as cumulative operating duration are omitted. - Uploading rolling stock equipment ledger documents to the knowledge base fails, with a parameter format error returned. The cause is that the ledger content in Markdown format is not organized into structured text that meets interface requirements, and correct document metadata is not passed through
variables.
How to confirm the configuration is complete
- Call the configured HTTP interface and check that the returned HTTP status code is 200 to confirm that the request authentication has passed.
- Compare the fields configured in
responseDatawith the actual returned JSON structure to confirm that all core fields exist and their units conform to the specifications of rolling stock equipment ledgers. - Pass the specified
variablesfiltering parameters to verify that the ledger data returned by the interface only includes records corresponding to the specified equipment type and date range. - Simulate high-frequency interface calls to confirm that no timeout errors occur, and verify that the timeout period setting is reasonable.
The values provided are common starting points and should be measured against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.