Vishay G4-DT, Technical Manual, Page: 122 / 174

Technical Manual
7-30
Bytes 2 and 3:
Define from which register number to read or write.
Bytes 4 to 15:
Contains the data when writing to the instrument.
Data to the fieldbus (Inputs in the master)
General
Data to the fieldbus are divided into two categories, one is the mandatory “base block”
which contain general data and the 12 modbus register used for reading from the
instrument. The second part is the up to twelve configurable data blocks.
Byte Contents Byte Contents
00 Instrument error
MSB
16 Read register 5
MSB
01 Instrument error 17 Read register 5
02 Instrument Status
MSB
18 Read register 6
MSB
03 Instrument Status 19 Read register 6
04 Command acknowledge 20 Read register 7
MSB
05 Command error 21 Read register 7
06 Start address, Read
MSB
22 Read register 8
MSB
07 Start address, Read 23 Read register 8
08 Read register 1
MSB
24 Read register 9
MSB
09 Read register 1 25 Read register 9
10 Read register 2
MSB
26 Read register 10
MSB
11 Read register 2 27 Read register 10
12 Read register 3
MSB
28 Read register 11
MSB
13 Read register 3 29 Read register 11
14 Read register 4
MSB
30 Read register 12
MSB
15 Read register 4 31 Read register 12