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Digital Ehenced (DE) Protocol Processor DPP
Description |
Benefits |
How Works |
Features |
Description
The DE Protocol Processor (DPP) is a single-chip integrated circuit that designed to be used in
the applications that require interface with Honeywell's SmartlineŽ field instruments.
The DPP alleviates the developer's burden of learning and implementing the Honeywell's
Digitally Enhanced (DE) protocol in related equipment.
The DPP extracts all PVs, SVs, and STATUS values broadcast by the field instrument and
presents high-level data to an equipment host processor.
The DPP is optimized for use within RTUs, PLCs, controllers, recorders, and other similar devices
equipped with a serial communication port (RS232).
The DPP IC maintains the necessary timing and control, as well as interpreting data packets
received from the encoded binary information into the high-level decoded format.
Benefits
- No familiarity with the DE protocol required.
- Single chip solution.
- Secure bumpless digital communication.
- Access to all variables.
- No Honeywell license needed.
How It Works
The DPP works by monitoring a single transmitter's digital
PV/SV and STATUS. The DPP converts the PV/SV data into
a standard IEEE floating point value. The field instrument
STATUS is converted into a simple binary status.
The DPP is a listen-only device which monitors all DE
communication activity and extracts only pertinent field
instrument measurement and status information.
The DPP does NOT extract any parameters that the field
instrument provides as embedded database parameters.
The DPP is designed to be placed after the signal conditioning
circuitry and communicate with a host microcomputer.
The DPP operates as a slave device to the master host
processor by presenting the next item of data translated when
requested by the host. The order of the data presented is fixed
by the field instrument and is not configurable in the DPP.
The DPP has no data buffer and must be serviced by the host
at a rate fast enough to avoid data loss.
The DPP will operate in any environment with legal DE
communication traffic (e.g. SFC, SCT, STI-MV, etc.) and still
provide the required field instrument data.
Features
- Accepts up to four DE devices.
- Provides "BAD PV" protection.
- Translates DE data into standardized formats.
- Compatible with all DE broadcast modes and formats.
- Processes all DE communications traffic.
- Provides all UART related functions.
- Operates as a slave device to host.
- Accommodates handhelds and host DCS activity.
Compatibility
The DPP is fully compatible with all Honeywell DE products, all 3rd party
DE products, and commercially available "smart" safety barriers.
Description |
Benefits |
Safety |
How Works |
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Smartline® Digitally Enhanced (DE) transmitters are a product of Honeywell Inc.
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