Filter
Top Products
Reference Manual
00809-0200-4801, Rev BA
April 2007
Rosemount 3051S
3-4
Block Instantiation The Rosemount 3051S supports the use of Function Block Instantiation.
When a device supports block instantiation, the number of blocks and block
types can be defined to match specific application needs.The number of
blocks that can be instantiated is only limited by the amount of memory within
the device and the block types that are supported by the device. Instantiation
does not apply to standard device blocks like the Resource, Sensor
Transducer, LCD Transducer, and Advanced Diagnostics Blocks.
By reading the parameter “FREE_SPACE” in the Resource block you can
determine how many blocks you can instantiate. Each block that you
instantiate takes up 4.5573% of the “FREE_SPACE”.
Block instantiation is done by the host control system or configuration tool, but
not all hosts are required to implement this functionality. Please refer to your
specific host or configuration tool manual for more information.
Simulation Simulation is the functionality of the AI block. To support testing, either
change the mode of the block to manual and adjust the output value or enable
simulation through the configuration tool and manually enter a value for the
measurement value and its status (this single value will apply to all outputs).
In both cases, first set the ENABLE jumper on the field device.
NOTE
All fieldbus instruments have a simulation jumper. As a safety measure, the
jumper has to be reset every time there is a power interruption. This measure
is to prevent devices that went through simulation in the staging process from
being installed with simulation enabled.
With simulation enabled, the actual measurement value has no impact on the
OUT value or the status. The OUT values will all have the same value as
determined by the simulate value.
RESOURCE BLOCK
FEATURES and
FEATURES_SEL
The FEATURES parameter is read only and defines which features are
supported by the 3051S. Below is a list of the FEATURES the 3051S
supports.
FEATURES_SEL is used to turn on any of the supported features that are
found in the FEATURES parameter. The default setting of the Rosemount
3051S does not select any of these features. Choose one or more of the
supported features if any.
UNICODE
All configurable string variables in the 3051S, except tag names, are octet
strings. Either ASCII or Unicode may be used. If the configuration device is
generating Unicode octet strings, you must set the Unicode option bit.
REPORTS
The 3051S supports alert reports. The Reports option bit must be set in the
features bit string to use this feature. If it is not set, the host must poll for
alerts. If this bit is set, the transmitter will actively report alerts.