Gossen R2600 User Manual download pdf (Page 8)

GOSSEN METRAWATT GMBH 8

2 Telegram structure

All telegrams consist of one of 3 sets in both request and reply direction, they differ in their principal structure.

Their use is fixed for each interface function of the R2600/01.

Structure and use of the set types are described as follows.

2.1 Short set

Short sets are used on the request side (from the master)

• for transmission of short instructions to the equipment (e.g. Reset)

• for short requests of important data from the equipment (e.g. event data)

Short sets are used on the reply side (from the R2600/01)

• for acknowledgement of requests that require no reply data.

Principal construction short set

Character No. Contents Meaning Remarks

1 10h Start character Especially for short set

2 0 ... FAh, FFh Equipment address Addr and/or 255 (see 2.4.1)

3 Function field (FF) see 2.4.2

4 Checksum (PS) = Equipment address + FFh

5 16h End character Common to all set types

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 39 40

No comments

Gossen R2600 User Manual Page 8