Process Image - WAGO 753-466 Manual

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Process Image

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4 Process Image
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The 753-466 I/O module provide 1 status byte (8 bits) and 1 data word (16 bits).
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Whether the status byte is read out via the fieldbus depends on how diagnostic
information is transmitted by the respective fieldbus or fieldbus
couplers/controllers used. In any case, the status byte can be read out using the
WAGO-I/O-CHECK commissioning tool via the service port of the fieldbus
coupler/controller.
The digitalized measured value is transmitted to the process image of the fieldbus
coupler/controller in a data word (16 bits) as an input byte 0 (low) and input byte
1 (high). This value is mapped with a resolution of 12 bits on bit B3 ... B14. Status
information, which can be evaluated for fault detection, is contained in the three
least significant bits (B0 ... B2).
If the measurement is above the measuring range, bit B0 is set = 1, and if the
measurement is below the measuring range or if a wire breaks, bits B0 and B1 are
set = 1.
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Mapping of process data in the process image of fieldbus systems
The representation of the I/O modules' process data in the process image depends
on the fieldbus coupler/controller used. Please take this information as well as the
particular design of the respective control/status bytes from the section "Fieldbus
Specific Design of the Process Data" included in the description concerning the
process image of the fieldbus coupler/controller used.
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WAGO-I/O-SYSTEM 750
753-466 2 AI 4-20 mA S.E.
Manual
Version 1.5.0