Gossen R2600 Manual Do Utilizador

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GOSSEN METRAWATT GMBH
10
2.3 Long set
The R2600/01 uses long sets to transmit instructions and parameters to the equipment and to receive data from the equipment.
Principal construction long set 
Character No. Contents
Meaning
Remark
1
68h
Start character
2
Length
Number of characters from equipment address to checksum 
exclusive
3
Length (repeat)
4
68h
Start character (repeat)
5
0 ... FAh, FFh
Equipment address
Addr and/or 255 (see 2.4.1)
6
Function field
(FF)
see 2.4.2.
7
Parameter index
(PI)
1)
1) Omitted for reply cycle data and event data.
see 2.4.3.
8
1
From channel
1)
9
1
To channel
1)
Omitted for parameter index 30h ... 3Fh
10
0
Receipt number
1)
. . .
n character data block
see 2.4.4.
Length + 5
Checksum
(PS)
2)
2) For the set types, the checksum is formed by bytewise summation without overflow summation over all characters from the equipment address to checksum exclusive.
Length + 6
16h
End character