5.5. Explicit Message Communication
5.5. Explicit Message Communication
The Explicit message can be sent from the embedded DeviceNet master through the system memory of the embedded PLC. Follow the next procedure for Explicit message communication in the embedded PLC.
(1) Enter an Explicit message request information into SW161–SW179.
(2) Enter 0x0001 (Single Request) into SW160.
No. | Description | Others |
SW160 | 0x0001: Explicit message request (Single Request) | 1:Error |
SW161 | MAC ID |
|
SW162 | Service ID |
|
SW163 | Class ID |
|
SW164 | Instance ID |
|
SW165 | Attribute ID |
|
SW166 | Request Data Size | MAX 26 |
SW167~SW179 | Service Request data | SB333~SB358 |
(3) Check a response message from SW160–SW179.
No. | Description | Others |
SW160 | 0x001X: Explicit communication is in progress. 0x0000: Explicit communication is completed. 0x002X: Explicit communication time is out. Other: Error | 1:Error |
SW161 | MAC ID |
|
SW162 | Service ID |
|
SW163 | Class ID |
|
SW164 | Instance ID |
|
SW165 | Attribute ID |
|
SW166 | Response Data Size | MAX 26 |
SW167~SW179 | Service response data | SB333~SB358 |
① If SW160 = 0x0000, the Explicit message is completed.
Check the response of SW166–SW179.
② If SW160 = 0x001x, the Explicit message communication is in progress.
③ If SW160 = 0x002x, it is an Explicit message communication error.