GOSSEN METRAWATT GMBH 13
2.4.3 Parameter index (PI)
The type of the data to be transmitted is defined via the parameter index. The "PI" character is interpreted as follows:
Functionally used data and/or setting parameters of an equipment are combined in the main parameter groups. Only those parameter indices docu-
mented in section 4 can be addressed in the R2600/01, an error message is issued for all others.
2.4.4 Length and format of the data block
Length and format of the data block are variable and a function of PI and FF.
The transmitted values can have byte or word format:
Bit 7-4 Bit 3-0
0 ... Fh 0 ... Fh
Selection number for main parameter group Selection number for a special parameter in the main group
8 Bit Number without sign
± 7 Bit 2's complement presentation Number with sign
16 Bit LS byte first Number without sign
± 15 Bit LS byte first, 2's complement presentation Number with sign
8/16 Bit LS byte first Bit field