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WAGO I/O System 750
753-482 2AI 4-20mA 12 Bit S.E. HART
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
Offset
0
1
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 → Services → Downloads → Additional documentation and
information on automation products → WAGO-I/O-SYSTEM 750 → 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
Bit 7
-
Table 28: Status Byte S0/S1
Bit 7
-
PROFIBUS Telegram (Acyclic PROFIBUS Services)
Designation of Bytes
AI0
AI1
Control Byte C0/C1
Bit 6
Bit 5
-
-
Status Byte S0/S1
Bit 6
Bit 5
Bit 4
General
-
fault
(Bit 0 or
Bit 1)
Analog input data Channel 1
Analog input data Channel 2
Bit 4
Bit 3
Bit 2
-
-
Bit 3
Bit 2
-
-
Process Image
Remark
Bit 1
Bit 0
-
-
Bit 1
Bit 0
-
Short
Cable
circuit
break
Channel
Channel
1, 2
1, 2
Manual
Version 1.2.0
37
-
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