Honeywell Searchpoint Optima Plus - 11. Use of the HART Communications; 11.1 General; 11.2 Connection; 11.3 Searchpoint Optima Plus User Interface

MAN0905_Issue 7_07/17 Searchpoint Optima Plus with optional HART
®
output
Operating Instructions
2108M0550
48
11. Use of the HART
®
Communications
Read this chapter if HART
®
communications are being used to communicate with
Searchpoint Optima Plus.
11.1 General
TheHART
®
versionoftheSearchpointOptimaPluscancommunicateusingtheHART
®
protocol.HART
®
devices provide digital communications superimposed on the standard analogue output. Detailed
informationabouttheHART
®
protocolcanbefoundattheHART
®
CommunicationFoundation’swebsite
www.hartcomm.org.
HART
®
is a master-slave protocol, i.e. the Searchpoint Optima Plus does not continually transmit data but
will respond on request.
SearchpointOptimaPlushasaHART
®
DeviceDescription(DD)le,whichisprovidedontheCDsupplied
withtheproduct,oravailabletodownloadfromHoneywellAnalyticswebsitewww.honeywellanalytics.com
ortheHART
®
Foundation website www.hartcomm.org.
TheDDleiswrittenusingHART
®
version7,andiscompatiblewithHART
®
DDTokenizerversions6and8.
TheDDleissuppliedin.fm6,.fm8,.hhdand.hddversions.Itiscompatiblewithawiderangeofindustry
standard products.
TousetheHART
®
communications,loadtheSearchpointOptimaPlusDDleintoasuitableHART
®
host
(seemanufacturer’sinstructions).
11.2 Connection
ItisbesttouseadedicatedHART
®
interfacepoint(forexampletheHALO*junctionbox)toconnecta
HART
®
handheld device.
Ifsuchaninterfaceisnotavailable,itispossibletoconnecttotheHART
®
signal across a load resistor in
the current loop. For example, provided there is the minimum resistance of 230 Ω in the 4-20 mA loop, the
HART
®
handheld device can be connected across the terminals in the junction box.
*ContactHoneywellAnalyticsforavailability
11.3 Searchpoint Optima Plus User Interface
11.3.1 Access Levels and Password Protection
TheSearchpointOptimaPlususerinterfacehasthreeaccesslevels.DefaultandLevel1areavailabletothe
user,whileLevel2accessisrestrictedtoHoneywellFieldServicepersonnel.
TheDefaultlevelisread-onlyanddisplaysinformationaboutthecurrentgasreading,congurationandunit
status, including active warnings and faults.
Level1accessisrequiredtotestandcalibratetheunit,andtomakechangestothedefaultconguration.
Level1accessispasswordprotected.Thepasswordis8digitalphanumeric(casesensitive),anditis
recommended that the user sets this to a password of their choosing. To avoid potential compatibility
issuesbetweendifferentHART
®
hostdevices,ensurethatafull8digitpasswordisused.