Страница 1 мировой engineering стандарты общая спецификация

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T(USDT-SF)
$7E0
$03
$22
$00
$0C
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N(USDT-SF)
$7E8
$05
$62
$00
$0C
$0B
$B8
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8.6.5.2 Physically Request Multiple PIDs Resulting In Multi-Frame Response. 
In the example below
(Table 86), the following is assumed true:
•
The ECU supports retrieving at least three PIDs in a single request.
•
The point to point request CAN Id for the ECU is $7E0.
•
The USDT response CAN Id of the ECU is $7E8.
•
The PID for Engine Coolant Temperature (as defined in SAE J1979/ISO 15031-5) is $05 (so this service
requests with $0005). The data returned is a single byte with a transfer function of °C = (N - 40). This
provides a temperature range from -40 to 215°C.
•
Engine Coolant Temperature is assumed to be 92°C at the time of the request.
•
The PID for engine rpm (as defined in SAE J1979/ISO 15031-5) is $0C (so this service requests with
$000C). The data returned is two bytes with a transfer function of rpm = N/4.
•
Engine Speed is assumed to be 750 rpm at the time of the request.
•
The time since engine start is defined in PID $001F contains two bytes of data with a scaling of 1 s per
count.
•
It is assumed that the engine has been running for 200 s.
--``,,``````,``,,``,,,`,`,`,,-`-`,,`,,`,`,,`---
Page 111
GM WORLDWIDE ENGINEERING STANDARDS
GMW3110
Table 86: ReadDataByParameterIdentifier(PID=0005 hex, PID=000C hex, PID=001F hex)
T = Frame Sent By Tester; N = Frame Sent By Node; shaded region indicates PCI
Frame Type CAN Id
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