Hello to everyone !We have a customer they have some difficulties in the process of programming. They want to send CAN data to another CAN module through pressing buttons of PV750,if press button once ,it will be send a group of data, if press twice ,it will be send another group of data, the rest can be done in the same manner and if not press, it won’t be send any data. Now the problem is that they downloaded the program wrote by themselves to PV750，then connected a CAN module ,and they did not press any button yet, the CAN module already accepted some data such as: data ID is 0X18EA00F2 or OX18EAFFF2, and the data is 8CFE00 or E5FE00. These data can’t be removed.
Then the customer also downloaded BASELINE program of pv750 to the unit for testing, the result is the same as above.
Connecting WAY: PV750 PORT A ---CAN module ---compute

Could you have any advice to this customer? If you have some similar cases, and have a successful program ,could you send it to me for reference ?
Thanks very much!
Peter Fu
FWMURPHY (China)

Hello pfu,

The messages they are seeing are:

0x18EA00F2 8C FE 00 (Request PGN 0xFE8C from source address 0x00)
0x18EA00F2 E5 FE 00 (Request PGN 0xFEE5 from source address 0x00)
0x18EAFFF2 8C FE 00 (Request PGN 0xFE8C from source address Any)
0x18EAFFF2 E5 FE 00 (Request PGN 0xFEE5 from source address Any)

The reason for these messages is that those PGNs are transmitted on request so the PV750 has to request those PGNs if it wants to use their parameters.

To eliminate those messages make you just need to eliminate the parameters from those PGNs from the device in the environment setup section.

The parameters are:
PGN 0xFEE5
Engine Total Hours of Operation (SPN 247)
Engine Total Revolutions (SPN 249)

0xFE8C
Auxiliary Temperature 1 (SPN 441)
Auxiliary Temperature 2 (SPN 442)
Auxiliary Pressure #1 (SPN 1387)
Auxiliary Pressure #2 (SPN 1388)
Auxiliary Level (SPN 3087)
Relative Humidity (SPN 354)

Regards,

ksaenz