If an ISO TP message length exceeds the data length of 8 data bytes, the UDS message must be segmented. The CAN-TP protocol works by dividing large data into smaller packets called Transport Protocol Data Units (TPDUs).

Feb 11, 2022 · ### UDS Diagnostic STMin Parameter Configuration and Troubleshooting In the context of automotive communication protocols, particularly within Unified Diagnostic Services (UDS), configuring and troubleshooting the `STMin` parameter is crucial for ensuring efficient data transmission between Electronic Control Units (ECUs).

ISO 15765-2, [1] or ISO-TP (Transport Layer), is an international standard for sending data packets over a CAN-Bus. The protocol allows for the transport of messages that exceed the eight byte maximum payload of CAN frames.

c) Parameter Separation Time (STmin) It is the minimum time slot between two consecutive frames. Example: If STmin is between 0 – 127 ($7F) then separation time is 0 – 127 ms (millisecond).

Contents without this specification refer to ISO 15765-2 (Network layer service). This specification applies to ECUs and a diagnosis tester to execute data communication on CAN bus. $ The values following to the symbol $ are the number of hexadecimal. (Store appropriate numerical value in "$XX"). CAN message consists of following information.

May 22, 2020 · 参数P2CAN_ECU（即ISO 15765-3中的P2CAN_Server）表示从ECU接收到请求消息到开始发送响应消息之间的定时器性能要求数值。 ECU必须确保一个单帧响应消息或者多帧响应消息的第一帧消息在P2CAN_ECU 时间内完成。 参数P2*CAN_ECU（即ISO 15765-3中的P2*CAN_Server）表示从ECU发送了NRC为0x78的否定响应消息到_uds stmin.

May 1, 2021 · Flow Control Frame: When first frame is received a flow control frame is send, which contain status flow, block size and separation time (STmin), It’s used for acknowledging the first frame.

Separation Time minimum (STmin) is a one byte value specified by receiving entity that informs about minimum time gap between the transmission of two following Consecutive Frames. STmin values: 0x00-0x7F - Separation Time minimum range 0-127 ms

STmin SeparationTime minimum UDS unified diagnostic services WWH-OBD world-wide harmonized OBD 4 Conventions ISO 15765 is based on the conventions discussed in the OSI service conventions (ISO/IEC 10731) as they apply for diagnostic services. 5 Document overview

Separation Time minimum (STmin) informs about minimum time gap between a transmission of two following Consecutive Frames. Maximal time value (in milliseconds) of STmin. Minimal value of STmin in milliseconds range (raw value and time value in milliseconds are equal).