Installation With The Honeywell Stt700; Parameter Settings - Honeywell HART STT700 Safety Manual

Smartline temperature transmitter

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4 — Installation with the HONEYWELL STT700

The person with knowledge of safety operations will be required to do the installation and

operation. No special installation is required in addition to the standard installation practices

outlined in the STT700 Smart Transmitter User Manual. However please note that when the

device is in safety operation that the optional write protect must be set in software so that the

device is write protected and HART

device is in safety operation that the Latching and Break Detect parameters must be enabled.

See STT700 Smart Transmitter User Manuals for details concerning these parameters

The software write protect is also available in the device with a password to disable the software

write protect. The default password is "0000". It can be enabled / disabled through HART host.

IEC 61508 Ed. 2.0 compliant hardware/software revisions for the STT700 can be found in the

Exida and TÜV Certification Reports. In addition, the most recent release information can be

found in the following document:

https://www.honeywellprocess.com/library/support/Public/Downloads/SmartLineHARTTemperat

ureFirmwareRevisions.zip

The following parameters need to be set in order to maintain the designed safety integrity:

mA Fault action

(Upscale/Downscale)

Engineering Range

devices must be disconnected. Also note that when the

The transmitter is shipped with a default failsafe

direction of upscale (21.5 mA.). This is acceptable

for all high trip applications. For low trip

applications, the fail-safe direction is downscale

(3.58 mA.). Transmitter configuration for burnout

operation may be changed from Host (DD/DTM) to

accomplish this action, see the User Manual.

All engineering range parameters must be entered

to match the trip points in the safety logic solver.

These parameters must be verified during the

installation and commissioning to ensure that the

correct parameters are set in the transmitter.

STT700 Safety Manual

June 2017

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