1. 0F (0x0F) write multiple coil output
Use this function code to write the value of multiple coils into the remote address.
2. Send message format
The more detailed format is as follows:
MBAP message header + function code + high bit of coil start address + low bit of coil start address + high bit of coil number + low bit of coil number + byte count of coil + coil output status, a total of N+13 words Festival.
3. Return message format
The more detailed format is as follows:
MBAP message header + function code + high bit of coil start address + low bit of coil start address + high bit of coil quantity + low bit of coil quantity, a total of 12 bytes.
4. Case
Slave station address: 1
Coil start address: 0
Coil number: 10
Suppose you want to set the value of a total of 10 coils with the slave station address as 1 and the start address as 0, and set the address 0 to 4 to ON, and the address 5 to 0. 9 set to OFF
4.1 Send the message as follows:
0x00、0x0a、0x00、0x00、0x00、0x09、0x01、0x0f、0x00、0x00、0x00、0x