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Maximilian Seesslen, 11.07.2023 13:50
NMT¶
Actuator introduction¶
When introduction is requested by system command, each device must send Its UID (function code "NMT introduce") and an description.
The NodeId may conflict due to an network error. But the master can detect different UUIDs with same NodeId.
| Size | Decription | Examples |
|---|---|---|
| 2 | Object | Object |
| 6 | MAC/Unique ID | 48Bit |
Objects¶
| Size | Decription |
|---|---|
| 1 | Request intoruction |
| 2 | MAC low |
| 3 | MAC high |
| 4 | Protocol versions |
| 5 | Firmware version |
| 6 | Product Code |
| 7 | Node-Id |
Protocol versions¶
| Size | Decription |
|---|---|
| 1 | TDT Major |
| 1 | TDT Minor |
| 1 | NMT Major |
| 1 | NMT Minor |
| 1 | Blob Major |
| 1 | Blob Minor |
Usecase: Setting Node-ID¶
Two nodes may have the same Node-ID. When scanning the network, the nodes will overwrite the counterparts information.
The "NMT-Introduce"-function code is used by the nodes to send theyr complete UID. NMT can then send
The new NodeID can not be part of the CAN-ID because the device may be filtering it out. (The whole NMT )
Von Maximilian Seesslen vor mehr als 1 Jahr aktualisiert · 1 Revisionen