BLN nobel G5, Техническое руководство

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Technical Manual
6-28
Bytes 0, 1 and 2:
See chapter ‘Communication – Modbus protocol.
Byte 4:
The ‘Command acknowledge’. It will be equal to the command number if
the command was successfully executed. If the command failed byte 4 will have
the value 240 (hex F0).
Byte 5:
This byte will be zero if a command is correctly executed otherwise it hold the
‘Command error’ code. The error code is explained in chapter ‘Troubleshooting – Error
codes’.
Bytes 6 and 7:
These two bytes is the starting address of the reading area following in bytes 8 to 31.
The address defines the address of the first of the 12 consecutive Modbus registers in
the read area. See chapter ‘Communication – Modbus protocol’ for details on Modbus
register address definitions.
Bytes 8 to 31:
These 24 bytes is the area used when the user wants to read any data that is
accessible through Modbus registers. The address (number) of the first register is
defined in bytes 6 and 7 and the instrument will keep the 24 bytes (12 registers)
updated.
Bytes 32 - 64:
See chapter ‘Communication – Modbus protocol for details
Bytes 65 – 79:
16 bytes reserved for use by special program versions.