Emerson 644 manual Analog Input AI Function Block, Analog Measurement Access, Outd Cutoff Filter

Page 88

Rosemount 644

Reference Manual

00809-0400-4728, Rev AA June 2011

ANALOG INPUT (AI) FUNCTION BLOCK

The Analog Input (AI) function block processes field device measurements and makes them available to other function blocks. The output value from the AI block is in engineering units and contains a status indicating the quality of the measurement. The measuring device may have several measurements or derived values available in different channels. Use the channel number to define the variable that the AI block processes.

The AI block supports alarming, signal scaling, signal filtering, signal status calculation, mode control, and simulation. In Automatic mode, the block’s output parameter (OUT) reflects the process variable (PV) value and status. In Manual mode, OUT may be set manually. The Manual mode is reflected on the output status. A discrete output (OUT_D) is provided to indicate whether a selected alarm condition is active. Alarm detection is based on the OUT value and user specified alarm limits. Figure C-1illustrates the internal components of the AI function block, and Table C-3lists the AI block parameters and their units of measure, descriptions, and index numbers.

Figure C-1. AI Function Block

Analog

Measurement

Access

Analog

Meas.

CHANNEL

ALARM_TYPE

HI_HI_LIM
HI_LIM	Alarm
LO_LO_LIM	Detection
LO_LIM
ALARM_HYS
LOW_CUT

OUT_D

	Cutoff	Filter	PV	Status
Convert				Status
Convert				Calc.
SIMULATE	L_TYPE	PV_FTIME
SIMULATE	L_TYPE
			MODE

FIELD_VAL IO_OPTS

STATUS_OPTS

OUT_SCALE

XD_SCALE

NOTES:

OUT = block output value and status.

OUT_D = discrete output that signals a selected alarm condition.

OUT

C-8

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Contents Reference Manual 00809-0400-4728, Rev AA JunePage Table of Contents Specifications Reference Data Appendix aAppendix B TOC-2Rosemount Temperature Transmitters Customer Central National Response Center InternationalPage Safety Messages Section IntroductionExplosions could result in death or serious injury Process leaks could result in death or serious injuryManual OverviewTransmitter Considerations 22 20 815 C 1500 F Oven Temperature 250 C 482 F Oven Temperature 5 6 7 8 Extension LengthExample AboveSection Installation Bench Calibration? Within Specifications? Refer to ConfigurationSimulate Sensor Input From draining into the transmitter housing MountingMounting a 644H to a DIN Rail Rail asymmetricTypical European Installation InstallationHead Mount Transmitter with DIN Plate Style Sensor Typical North American Installation Head Mount Transmitter with Threaded SensorLCD Display Installation Installing the LCD DisplayWiring Power terminals does not drop below 9 VdcSensor Connections Thermocouple or Millivolt InputsSensor Input Approximate Basic Error Sensor Lead Wire Resistance Effect- RTD InputRTD or Ohm Inputs Pt100 2-wire RTD Error due to amb. temp. var. of ± 25 CPower Supply Foundation fieldbus InstallationGround the Transmitter Ungrounded Thermocouple, mV, and RTD/Ohm InputsGrounded Thermocouple Inputs Section Configuration Overview Safety MessagesGeneral Block Information Device Description Node AddressModes AutoLink Active Scheduler Block Installation Resource Transducer Analog Input OtherCapabilities Foundation Fieldbus Function BlocksFeatures Resource BlockUnicode ReportsFeaturessel FailedalarmsMaxnotify PlantWeb AlertsMaintalarms FailedmaskRecommended Actions for PlantWeb Alerts Advisory AlarmsRecommendedaction Configure the AI block Sensor Transducer BlockAnalog Input AI Function Block DampingLtype Pressure Channel Temperature ChannelXdscale and Outscale Configuration Examples Transducer BlockProcess Alarms FilteringAlarmtype OutdLCD Transducer Block DisplayparamselBLKTYPE#1 PARAMINDEX#1Operation and Maintenance OverviewUNITSTYPE#1 CUSTOMUNITS#1Troubleshooting Guides Troubleshooting guideProblems with communications flowchart Calpointlo + Calminspan Diagnostics Recall Factory TrimBlock Blockerr messages Sensor Transducer Block Xderr messagesDescription CalibrationerrManual Mode StatusSimulation SimulateTroubleshooting AI block Power UpSymptom Possible Causes Recommended Actions 00809-0400-4728, Rev AA June AI Blockerr ConditionsBlock Errors 8lists conditions reported in the Blockerr parameter10. Resource Block Condition NameSymptom Possible Causes Recommended Action Self Test Procedure for the LCDAuto Specifications Appendix a Specifications Reference DataFunctionalInputs Physical Performance Foundation Fieldbus Specifications Rosemount Conformance to SpecificationsFunction Blocks 2 σ -1 σPower Supply AlarmsBackup Link Active Scheduler LAS Software Upgrade in the FieldTable A-1. Rosemount 644 Input Options and Accuracy AccuracyAccuracy Example Table A-2. Ambient Temperature Effect Ambient Temperature EffectThermocouples Temperature Effects Examples Dimensional Drawings 644H DIN a Head MountLCD Display Mounting00809-0400-4728, Rev AA JuneLCD Display Cover Sanitary Housing CoversRing 76.2 27.9 74.4 25.4 44.5 70.0 Ordering Information OptionsConfiguration Standard Alarm Level Configuration StandardAssemble To Options Standard Enclosure Options StandardTagging ConsiderationsConfiguration tool Transmitter ConfigurationWith DeltaV, with AMS, or other Foundation fieldbus host or Standard Foundation fieldbus Configuration Custom ConfigurationRequirements Option Code Specification Standard Block ConfigurationAppendix B Product Certifications CE Electromagnetic Compatibility Compliance TestingAtex Directive 94/9/EC North American Certifications Hazardous Locations CertificatesRosemount 644 with Foundation fieldbus Loop/Power Terminals Fisco Loop/Power TerminalsEuropean Certifications Special Conditions for Safe UseTemperature Class IECEx CertificationsTo 60 C Fisco Group IIC To 80 CTable B-3. Entity Parameters Transmitter I.S Transmitter Fisco SensorTransmitter Sensor Schedule of LimitationsUkraine Gost Pattern Approval for Measuring Instruments See CertificateApproval Temp Description Group CodeInstallation Drawings Rosemount Rosemount Rosemount 00809-0100-4728, Rev AA June Sheet 2 00809-0100-4728, Rev AA June Sheet 3 00809-0100-4728, Rev AA June 00809-0100-4728, Rev AA June Sheet 2 Rosemount Rosemount 00809-0100-4728, Rev AA June Sheet 2 00809-0100-4728, Rev AA June Sheet 3 Appendix C Foundation fieldbus Block Information Basic Setup Resource BlockDefinition Parameters and Descriptions IndexFailedenable FeaturesFeaturesel Maintenable00809-0400-4728, Rev AA Parameters Descriptions Sensor Transducer BlockDescription Effects transmitter operation Primaryvaluerange PrimaryvaluetypeSensrdetailedstatus CalvandusencoeffXderror SESNOR1DAMPINGTransducerdirectory TransducertypeAnalog Measurement Access Analog Input AI Function BlockOutd Cutoff Filter Convert CalcAI Parameter Table AckoptionLolopri Table C-4. LCD Transducer Block Parameters and Descriptions LCD Transducer BlockParameter Index Description Table C-5. PID Block Parameters and Descriptions PID BlockParameter Index Index Ungrounded Wiring MODEBLK.TARGET Bad UncertainLolim Lololim Lolopri Lopri Lower Trim Method DIN Rail Threaded SensorLimited Man Mode Unicode UNITSTYPE# Upper Trim Method Grounded Ungrounded WiringSecurity Self Test Direct Zero TrimIndex-4 Page Temperature GmbH Pacific Private Limited Emerson Process Management Rosemount Inc