I was wondering if the the PPCAN-Editor behavior is correct: I import CAN signals / messages using an existing .dbc file but the PPCAN-Editor doesn't not apply the signal scaling factors. On top the scaling seems to be corrupted when I manually add factors in my case when I use a PCAN-Router IO variable as temporary storage.
I created a small example configuration to check if that's really the case.
I sent a signed signal of -12.0 m/s on CAN channel one (with scaling 0,1) and want to receive that signal in another CAN message on channel two (using scaling of 0.5), instead of receiving the same value of -12.0 m/s I receive a value of -3.0 m/s. The signal is stored in an IO variable inside of the CAN router before re-transmission, other function blocks are not active.
My expected behavior of the router would be as follows:
- Router takes signal scaling factors and applies them to the received CAN message (no manual change in PPCAN-Editor)
1. Router receives CAN message as raw value (--> -12,0 m/s) and applies scaling = physical value
2. Temporary storage of physical value
3. Router applies correct scaling and transmits raw value using the new scaling factor --> -12,0 m/s
I attached a picture of my test setup including PCAN explorer which I used to check the sent/received values:
- the not correct signal values
- scale.png (119.19 KiB) Viewed 1306 times
As well as the configurations I prepared:
Another thin I recognized that my scaling factor was changed automatically in lower digits from 0,1 to 0,1000xxx something. When I moved between the different configuration tabs:
- issue with added digits when moving between tabs
- scaling changes.png (12.24 KiB) Viewed 1306 times
