Emerson Rosemount 2240S, Reference Manual, Page: 76 / 194

66
Reference Manual
00809-0100-2240, Rev DA
Configuration/Operation
October 2017
Configuration/Operation
5.7 F
OUNDATION
™
fieldbus overview
This section provides a brief overview of F
OUNDATION
fieldbus block operation with the Rosemount 2240S
Multi-Input Temperature Transmitter.
For detailed information about F
OUNDATION
fieldbus technology and function blocks used in the
Rosemount 2240S Series, refer to Appendix C: Foundation™ Fieldbus Block Information and the F
OUNDATION
Fieldbus Block Manual (Document No. 00809-0100-4783).
5.7.1 Block operation
Function blocks within the fieldbus device perform the various functions required for process control.
Function blocks perform process control functions, such as analog input (AI) functions, as well as propor-
tional-integral derivative (PID) functions. The standard function blocks provide a common structure for
defining function block inputs, outputs, control parameters, events, alarms, and modes, and combining
them into a process that can be implemented within a single device or over the fieldbus network. This
simplifies the identification of characteristics that are common to function blocks.
In addition to function blocks, fieldbus devices contain two other block types to support the function
blocks. These are the
Resource block and the Transducer block .
Resource blocks contain the hardware specific characteristics associated with a device; they have no
input or output parameters. The algorithm within a resource block monitors and controls the general
operation of the physical device hardware. There is only one resource block defined for a device.
Transducer blocks connect function blocks to local input/output functions. They read sensor hardware
and write to effector (actuator) hardware.
Resource block
The Resource block contains diagnostic, hardware, electronics, and mode handling information. There
are no linkable inputs or outputs to the Resource block.
Measurement transducer block (TB1100)
The Measurement transducer block contains parameters for configuration of the Rosemount 2240S for
temperature measurements as well as temperature measurement data. It contains device information
including diagnostics and the ability to configure, set to factory defaults and restart the temperature
transmitter.
Register transducer block (TB1200)
The Register transducer block allows a service engineer to access all database registers in the device.
Average Temperature transducer block (TB1300)
The Average Temperature transducer block contains parameters for configuration of average
temperature calculations for the 2240S Multi-Input Temperature Transmitter.