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WAGO-I/O-SYSTEM 750
750-484 2 AI 4-20 mA HART Ex i
4.6
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 27: 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 2 commissioning tool.
Table 28: Control Byte C0/C1
Bit 7
-
Table 29: Status Byte S0/S1
Bit 7
-
Manual
V 1.2.0 HW-Version 04, SW-Version 03
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
General
-
fault
(Bit 0 or
Bit 1)
Analog input data Channel 1
Analog input data Channel 2
Bit 4
Bit 3
-
-
Bit 4
Bit 3
-
-
Process Image
Remark
Bit 2
Bit 1
-
-
Bit 2
Bit 1
-
Short
circuit
Channel
Channel
1, 2
37
Bit 0
-
Bit 0
Cable
break
1, 2
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