comfilehmi:simplemodbus:modbus_code1:index
Function Code 01 : Read Coil
This Function Code reads the state of 1 or more bits. The example below reads coils 1 ~ 8.
Query:
| Field | Data | Number of Bytes |
|---|---|---|
| Slave Address | 0x03 | 1 |
| Function Code | 0x01 | 1 |
| Start Address HI | 0x00 | 1 |
| Start Address LO | 0x00 | 1 |
| Length HI | 0x00 | 1 |
| Length LO | 0x08 | 1 |
| Error Check | CRC | 2 |
Response:
| Field | Data | Number of Bytes |
|---|---|---|
| Slave Address | 0x03 | 1 |
| Function Code | 0x01 | 1 |
| Byte Count | 0x01 | 1 |
| Data | 0x53 | 1 |
| Error Check | CRC | 2 |
비트정보 8 개를 읽어서 한 개의 바이트로 구성한 다음 반환해줍니다..
comfilehmi/simplemodbus/modbus_code1/index.txt · Last modified: 2016/12/07 15:37 by COMFILE Technology