ISO14229:2013 之 保持连接TesterPresent (0x3E)
3E服务通过周期地发送请求帧来,防止定时器发生超时,阻止自动跳转回defaultSession状态。确保诊断服务或者之前激活的通信还处在激活的状态,并保持当前的非defaultSession状态。
1、Request message:
2、Positive Response message:
3、Supported Negative Response codes (NRC_):
4、Example #1 - TesterPresent (suppressPosRspMsgIndicationBit = FALSE):
Request:
0x727 02 3E 00 [00 00 00 00 00]
Positive Response:
0x7A7 02 7E 00 [00 00 00 00 00]
Example #2 - TesterPresent (suppressPosRspMsgIndicationBit = TRUE):
Request:
0x727 02 3E 80 [00 00 00 00 00]
Response:
不需要回复正响应Response报文。