Trox Technik FSL-CONTROL II, Руководство по установке и настройке, Страница: 68 / 80

Configuring interfaces to the central BMS
Modbus RTU interface
Single room control system FSL
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CONTROL II 68
4
Modbus function 1 (0x01) Read Coils
This function is used to read the state of several bits.
Request:
Byte 0 Slave Address Rotary switch 1-99
Byte 1 Function Code 0x01
Byte 2-3 Starting Address Number of the first bit
Byte 4-5 Quantity of Coils Number of bits
Response:
Byte 0 Slave Address Rotary switch 1-99
Byte 1 Function Code 0x01
Byte 2 Byte Count Number of bytes
Byte 3 Coil Status Bit values
Byte ... Coil Status Bit values
Error:
Byte 0 Slave Address Rotary switch 1-99
Byte 1 Error Code 0x81
Byte 2 Exception Code 0x02,0x03
Modbus function 5 (0x05) Write Single Coil
This function is used to write to a single bit.
Request:
Byte 0 Slave Address Rotary switch 1-99
Byte 1 Function Code 0x05
Byte 2-3 Output Address Bit number
Byte 4-5 Output Value 0x0000 (false), 0xFF00 (true)
Response:
Byte 0 Slave Address Rotary switch 1-99
Byte 1 Function Code 0x05
Byte 2-3 Output Address Bit number
Byte 4-5 Output Value 0x0000 (false), 0xFF00 (true)
Error:
Byte 0 Slave Address Rotary switch 1-99
Byte 1 Error Code 0x85
Byte 2 Exception Code 0x02,0x03