8.7.5 Transducer block simulate
Setting PWA_SIMULATE to ON also allows simulating transducer block status and
checking the correct mapping onto the PlantWeb alert's FAILED_ACTIVE,
MAINT_ACTIVE, and ADVISE_ACTIVE parameters.
8.7.6 Support transducer block errors
• Out of service: Set whenever the transducer block actual mode is OOS.
• Input failure: Set whenever there is a communication error between the
Fieldbus A2D card and the transmitter.
• Simulation active: Set whenever the Fieldbus simulate switch is set to ON at the
Fieldbus A2D card or the software simulate option is enabled.
• Other error: Set whenever XD_ERROR is non-zero.
8.8 Analog input (AI) function block
8.8.1 Introduction
The transmitter has four transducer block input/output channels (Table 8-22) for
the analog input (AI) function blocks. The status of channel values are defined in
Table 8-24.
The analog input AI function block (Figure 8-4) processes field device
measurements and makes them available to other function blocks. The output
value from the AI block is in engineering units and contains a status indicating the
quality of the measurment. The measuring device may have several
measurements or derived values available in different channels. Use the channel
number to define the variable that the AI block processes.
FOUNDATION
™
Fieldbus Manual
December 2022 00809-0500-4880
146 Emerson.com/Rosemount
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