Measurement Computing DBK70 - Manual (Page 76)

6-10 Fundamentals of Obtaining Vehicle Data 928494 DBK70 User’s Manual
The following diagram is an excerpt from the J2190 standard showing the layout of the DDP request and
response messages. Once the request message has been transmitted, the target module will periodically
transmit the requested DDP, so no further transmissions of the request message are necessary.
The following diagram shows how to construct a request message. This message, which stimulates the
network module to continually transmit the specified DPID#, is issued after the DDP is defined. It includes
the DPID# and the desired data rate.