FCT \ 16: Write n double words¶
The function code “write double word” is not defined in the MODBUS RTU standard. This is why the double word is composed of a low word and a high word (depending on the manufacturer).
| Server operand address | Number of words | Number of bytes | …Data… | CRC | |||
| High | Low | High | Low | High | Low | ||
| Server address | Function code | Server operand address | Number of words | CRC | |||
| High | Low | High | Low | High | Low | ||