Sending and receiving of CAN Messages (STD Frame Format) via ADS

Sending CAN messages via ADS

AdsWrite:

NETID = AoeNetId der EL6751

PORT = 200

IDXGRP = 16#F921

IDXOFFS = 0

LEN = Length of the following DATA,

DATA[0]:             1st CAN-Message, CAN-Id Bit 0-7

DATA[1], Bit 0-2:     1st CAN-Message, CAN-Id Bit 8-10

DATA[1], Bit 7:     1 = RTR (the length then indicates the number of data to be read, no data follows the message, the next CAN message starts at DATA [3]

DATA[2]:             Length of the 1st CAN-Message

DATA[3-n]:         Data of the 1st CAN-Message

DATA[(n+1)]:         2nd CAN-Message, CAN-Id Bit 0-7

etc.

Enable / disable CAN messages for receiving

For receiving, the CAN IDs must first be activated.

AdsWrite:

NETID = AoeNetId der EL6751

PORT = 200

IDXGRP = 16#F923

IDXOFFS = 0

LEN = Number of CAN-IDs * 2

DATA[0]:             1st CAN-ID, Bit 0-7

DATA[1]:             1st CAN-ID, Bit 8-11,

Bit 15=0:            Activate for receiving

Bit 15=1:             Deactivate for receiving

DATA[2]:             2nd CAN-ID, Bit 0-7

etc.

Reading the received CAN messages

AdsRead:

NETID = AoeNetId der EL6751

PORT = 200

IDXGRP = 16#F921

IDXOFFS = 0

LEN = 640 (maximum buffer size)

The DATA has the same structure when sending the CAN messages.

The buffer in the EL6751 comprises approx. 50 CAN messages (with 8 bytes of data per frame).
This feature is available from FW18.