WAGO I/O System 750
Process Image 37
753-482 2AI 4-20mA 12 Bit S.E. HART
Manual
Version 1.2.0
4.1.5
AI 4-20 mA + 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 “2AI + 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.
Additional Information about PROFIBUS DP/V1 750-333 or 750-833
You can read a detailed description of this in the PROFIBUS DP/V1 Fieldbus
Coupler 750-333 manual or Fieldbus Controller manual in the section “750-333
Fieldbus Coupler” or “750-833 Fieldbus Controller”/“Configuring and
Parameterizing the I/O Modules”/“Analog I/O Modules”/“2 AI Modules”.
You will find these manuals on the Internet at:
www.wago.com
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Fieldbus
Coupler and Programmable Fieldbus Controller
The status bytes provide status information on the input channels. This can also
be displayed using the WAGO-I/O-
CHECK
commissioning tool.
Table 27: Control Byte C0/C1
Control Byte C0/C1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
-
-
-
-
-
-
-
-
Table 28: Status Byte S0/S1
Status Byte S0/S1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
-
General
fault
(Bit 0 or
Bit 1)
-
-
-
-
Short
circuit
Channel
1, 2
Cable
break
Channel
1, 2