Format of TopWare user-defined packet |
| Offset | Size | Description | |
|---|---|---|---|
|
00h |
BYTE |
FFh | |
|
01h |
WORD |
(call) | length of data field plus 3 |
| (ret) | length of received message (0000h if none received) | ||
|
03h |
BYTE |
destination ID (FFh for broadcast message) | |
|
04h |
BYTE |
sending station ID | |
|
05h |
BYTE |
type code (11h; all other codes reserved for TopWare) | |
|
06h |
N BYTEs |
received message | |