ABB Model 691 HT Operates As a HART Modem for a PC Based Software Communication

ABB Model 691 HT Operates As a HART Modem for a PC Based Software Communication


Microprocessor-based field Communicator

– connects to any wiring termination point

– allows the user to configure, calibrate, rerange and troubleshoot the transmitter without going to the device

– provides transmitter-PC standard interfacing for software upgrade and handling of new HART devices

Generic communications with any HART compatible instrument

Operates as a HART modem for a PC-based software communication

Comprehensive management of HART devices including the following

– 2600T and 600T series pressure transmitters

– TH and 600T series temperature transmitters

– 2000T and AS800 series pressure transmitters

– Deltapi K series pressure and temperature transmitters

– other devices with HART operativity from ABB instrumentation range

Functional specification

The smart electronic transmitter can be configured easily from the Hand-Held Communicator through a bidirectional communication with the smart transmitter.

A configuration consists of three types of data:

1 - User descriptive data which are not sent to the transmitter

2 - Operational parameters of the transmitter which include upper and lower range values, damping time, linear or square root output and engineering unit selection.

Informational data to allow identification and physical description of the transmitter which include tag, descriptor, message and date.

3 - In addition to the configurable parameters and data, the transmitter data base is customized at the factory with specified process flange material, drain/vent, O-ring

materials and output meter code option.

The transmitter data base also contains pieces of information which are not user-changeable: transmitter type, range limits, minimum span, fill fluid, process isolating

diaphragm material, electronics module serial number and software revision level.

A configuration is either identified by the Tag Name allocated to each transmitter at the factory.

A polling address can also be given to allow the transmitter to work in traditional multidrop mode when its output remains fixed at 4 mA.