Buffer Parameters (to Be Configured for Each Used Buffer)¶
| Name | Value | Internal Value |
Internal Value, type |
Default |
|---|---|---|---|---|
| Identifier | 0..2047 (CAN2A) | 0..2047 (CAN2A) | WORD (CAN2A) | 0 |
| 0..536870911 (CAN2B) | 0..536870911 (CAN2B) | DWORD (CAN2B) | ||
| Receive buffer size (size in numbers of telegrams) | 1..32 | 1..32 | BYTE | 1 |
| Behaviour on receive buffer overflow *) | Overwrite | 0 | BYTE | 0 |
| Discard | 1 | |||
| Overwrite and send diagnostics (PROFINET® alarm) | 3 | |||
| Discard and send diagnostics (PROFINET® alarm) | 4 |
*) The following table describes the values in detail:
| Setting | Description |
|---|---|
| Overwrite | The oldest buffer entry which is stored in the buffer is overwritten with the new incoming telegram. |
| Discard | The new incoming telegram is discarded. |
| Overwrite and send diagnostics (PROFINETâ alarm) | The oldest buffer entry which is stored in the buffer is overwritten with the new incoming telegram. Additionally, a PROFINETâ alarm (diagnostic) will be sent to inform the user of the overflow occurrence. |
| Discard and send diagnostics (PROFINETâ alarm) | The new incoming telegram is discarded. Additionally a PROFINETâ alarm (diagnostic) will be sent to inform the user of the overflow occurrence. |
Note
Up to 64 buffers are allowed to be configured for each CAN2A and CAN2B type, each buffer containing the parameters described above.