Arithmetic (Arthm) Function Block - Emerson Rosemount OCX8800A Manual

F Fieldbus
™
OUNDATION
December 2022
Mode sheds from RCAS to AUTO
Potential cause
Host system is not writing RCAS_IN with a Quality and Status of good cascade
within shed time. The mode shed timer, SHED_RCAS, in the resource block is shed
too low.
Recommended action
Increase the value.
Mode sheds from ROUT to MAN
Potential cause
Host system is not writing ROUT_IN with a Quality and Status of good cascade
within shed time. The mode shed timer, SHED_RCAS, in the resource block is shed
too low.
Recommended action
Increase the value.
8.10

Arithmetic (ARTHM) function block

The arithmetic function block provides the ability to configure a range extension
function for a primary input and applies the nine different arithmetic types as
compensation to or augmentation of the range extended input. All operations are
selected by parameter and input connection.
Figure 8-24: Arithmetic (ARTHM) Function Block
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