PEAK-System Forum

Is it possible to create a multiplexer that spans two messages?

For example, my application has two messages that are sent consecutively, 00EF05C7 and 00EF05C8.

The first message indicates what information is in the payload of the second message, and changes each time it is sent. I can't simply create a multiplexer or variable from the second message only, because the information being sent will change depending on the first message.

I want to create a variable or multiplexer for the second message that is dependent on the value in byte 4 of the first message.

For example, if byte 4 of 00EF05C7 is 84h, then update the variable that is tied to 00EF05C8. Otherwise, don't change that variable.

Is this possible using a multiplexer? If not, is there another way to do so?

No, it´s not possible to use multiplexer over more than one CAN Frame.
Also it´s not possible to dynamicly change the pre-settings of CAN Databytes (data Type, LEN etc.).
You need to change the SYMBOL file and apply the changes. Maybe you could solve it with a macro, but therefore the information you send is to less. Please send a e-mail to support[at]peak-system.com, including the SerNo and Version-Info of the used PE and a more detailed description what exact should/could changed in the second CAN Frame when in the first CAN Frame a special Byte / Signal changed it´s value.