Manual

22 PLM Communications
PLM Communications
CAN Messages
The PLM can transmit up to four CAN messages containing readings and
diagnostics.
The format of these four messages is fixed (see Appendix M – CAN Messages
Format), but the following parameters can be configured by the user for each
message under the Setup | CAN Messages menu.
Address Format:
Standard address formatting is recommended for most applications.
Extended addressing should normally only be used if required for
interfacing to third party equipment, however it is supported by the ADL if
required.
Address:
The CAN address for a message is specified in hex. The recommended
address range for PLM messages is hex 460 to hex 46F.
Compound ID:
The compound ID (0 to 255) is placed in the first data byte of the CAN
message and is used to differentiate between messages sent to a single
CAN address. Multiple messages can be transmitted to a single address
by specifying different compound IDs for each message.
Message Rate:
The message rate (1,2,5,10,20 or 50 times per second) determines how
often the CAN message is transmitted.
Scaling
The scaling of the actual reading for the PLM is determined by the Output to
Transmit parameter which specifies the output table to be used for transmitted
values (eg. Lambda, O2 concentration etc.).