G4 Multi Channel Weighing Instrument. PM/DT/HE Technical Manual

Technical ManualData from the fieldbus (Outputs in the master)GeneralThis 16 bytes block is mandatory, i.e. it is always mapped to the fieldbus in theinstrument.Byte Contents00 Command01 Number of registers to write02 Start address, Read/Write MSB03 Start address, Read/Write04 Write register 1 MSB05 Write register 106 Write register 2 MSB07 Write register 208 Write register 3 MSB09 Write register 310 Write register 4 MSB11 Write register 412 Write register 5 MSB13 Write register 514 Write register 6 MSB15 Write register 6Byte 0:The command byte is used when setting the read window starting address, writing datato the instrument and to issue various scale related commands such as taring, zeroingetc.Commands:0 No action250 (hex FA) Change read window251 (hex FB) Write data252 (hex FC) Clear the Program reset bit in the Instrument Status register.Plus commands according to the manual, section ‘6. Communication –Modbus protocol – Command register’.Note that a new command is detected when the content of the command register ischanged. If the same command is used more than once another command e.g. 0 mustbe used in between.The response to a given command is the ‘Command acknowledge’ and the‘Command error’ bytes that are described below in section ‘Data to the fieldbus’.6-30