SMAR HI302, User Manual

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General Vision
1.2
Function Blocks
Several blocks were implemented to give the module the required functionality.
HART Transducer Blocks
HCFG (HART Configuration) – Concentrates general configuration parameters for
module working, in addition to parameters on HART Communication performance and
diagnostic.
HIRT (HART Identification and Real Time data) – This block contains the main
parameters, i.e., the most commonly used, besides dynamic variables. All parameters
related to universal commands and some main “Common Practice” commands are found
here. There should be one HIRT block for each HART device installed, up to 32 blocks. In
normal operation, the HIRT block parameters show the HART device variables, since
there are mechanisms to keep the HI302 database updated. See the Appendix A or the
Function Blocks handbook for details.
HVT (HART Variable Template) – This block is a large collection of variables for general
use arranged in arrays. It is now possible to access any HART instrument parameter. To
this effect, the module should get a configuration (HCD and HWPC blocks) to define the
specific instrument one wants to access, and how these commands will relate to each
parameter on the block. There is just one HVT block that should be shared among the
devices when accessing them through the HART_TAG. This configuration is already
configured in the Smar device’s memory.
Process View
(Workstation) Syscon
(Configuration Station)
Asset View
(Maintenance)
Up to 15 devices per channel in multidrop mode.
(Only digital communication with fixed current)
Secondary Master
Multidrop Mode
Point to Point Device
(HART + 4-20 mA)
Primary Master
Up to 32 Devices
Power Supply