WAGO-I/O-SYSTEM 750
Description of Operation
65
750-484 2 AI 4-20 mA HART Ex i
Manual
V 1.2.0 HW-Version 04, SW-Version 03
10.2.1 Communication on the 750-333, -833 with Dynamic
Variables
The use of the HART I/O module with a WAGO PROFIBUS DP/V1 Coupler
750-333 or Controller 750-833 is described briefly below.
Figure 25: System Overview with a PROFIBUS Fieldbus Coupler/Controller
The WAGO fieldbus node with PROFIBUS DP/V1 coupler/controller serves as a
data gatherer/distributor for the superimposed controller. The coupler/controller
processes the process variables from the HART devices.
Communication on PROFIBUS takes place by means of the acyclic PROFIBUS
DP/V1 commands. A prerequisite for the implementation of cyclic
communication is the successful start-up of cyclic data traffic.
The final transfer of data between the HART I/O module and the connected
sensor then takes place using the HART-on-Profibus protocol.
Parameterization/monitoring of the HART devices can be carried out both using a
PC application in the DP/V1 leg and also using a handheld directly in the HART
leg. An IEC development tool (e.g., WAGO-I/O-
PRO
CAA (Item No.: 759-333),
the “SIMATIC Manager” or other) is used for the parameterization environment.
10.2.2 Commissioning on the 750-333, -833 with Dynamic
Variables
This section describes the most important steps for commissioning the HART I/O
module on a PROFIBUS DP/V1 fieldbus coupler 750-333 or fieldbus controller
750-833 using the dynamic variables.
