WAGO I/O System 750
Process Image 37
750-482/000-001 2AI 4-20mA HART NAMUR NE43
Manual
Version 1.0.2
Table 25: PROFIBUS Telegram, Receive Direction, 4 HART Variable per Channel
PROFIBUS Telegram Input Data (4 Variable per Channel)
Offset
Byte Designation
Remark
28
TV1
Tertiary variable Channel 2
29
30
31
32
QV1
Quartary variable Channel 2
33
34
35
There is no status byte in the process image for the “4 HART Variable per
Channel” operating mode.
4.6
Acyclic PROFIBUS Services
With the PROFIBUS DP/V1 Fieldbus Coupler 750-333 or Fieldbus Controller
750-833, only the two cyclic AI process values are mapped into the process
image of the connected coupler in the "Acyclic PROFIBUS services" mode.
HART-via-DPV1-services are passed on using acyclic PROFIBUS services.
Table 26: PROFIBUS Telegram, Acyclic PROFIBUS Services
PROFIBUS Telegram (Acyclic PROFIBUS Services)
Offset
Designation of Bytes
Remark
0
AI0
Analog input data Channel 1
1
2
AI1
Analog input data Channel 2
3
Depending on how the PROFIBUS coupler/controller is parameterized using the
GSD, the control and status bytes can also be transmitted via PROFIBUS in
addition to the data bytes provided by the HART I/O module.
