Emerson 848T Satellite Radio manual

Summary of contents each page of manual

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www .rosemount.com Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T High Density T emperature T ransmitter with F OUNDATION ™ fieldbus Device Revision 7.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T www .rosemount.com Rosemount 848T High Density T emperature T ransmitter with F OUNDATION fieldbus NOTICE Read this manual before working with t he produ ct.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 TOC -1 Rosemount 848T SECTION 1 Introduction Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Warnings . . . . . . . . . . . . . . . . . . . . .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T TOC -2 SECTION 4 Operation and Maintenance Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Warnings . . . . . . . . . . . . . .
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Reference Manua l 00809-0100-46 97, Rev EA October 2011 Rosemount 848T www .rosemount.com Section 1 Introduction Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 1- 1 Overview . . . . . . . . . . . . . . . . . . .
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 1-2 OVERVIEW T ransmitter The Rosemount 848T is optimal fo r process t emperatur e measur ement because of its ability to simultane ously measure eight separate and independent temp erature points with one tr ansmitter .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 1-3 Rosemount 848T SERVICE SUPPORT T o expedite the return process in North America, call the Emerson Process Management Nationa l Response Center toll-free at 800-654-7768 . This center , available 24 hours a day , will as sist with any neede d information or materials.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 1-4.
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Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Section 2 Inst allation Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 2-1 Mounting . . . . . . . . . . . . . . . . . . .
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-2 Mounting to a DIN Rai l Without an Enclosure T o mount the 848T to a DIN rail without an enclosure, follow these step s: 1. Pull up the DIN rail mounting clip located on the top back side of the transmitter .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 2-3 Rosemount 848T Mounting to a 2-in. Pipe S tand Use the optional mountin g bracket (opt ion code B6) to mount the 848T to a 2-in.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-4 WIRING If the sensor is inst alled in a high-volt age en vironment and a fault cond ition or installation error occu rs, the sens or lead s an d tra ns m itte r te rm in als co uld carry lethal volta ges.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 2-5 Rosemount 848T RTD or Ohm Inputs V arious RT D configurations, includ ing 2- wire an d 3-wire a re used in indu strial applications.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-6 Figure 2-5. 848 T Analog Input Wiring Diagram Figure 2-6. 848T Analog Connector Power Supply Analog Input Connectors Analog T .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 2-7 Rosemount 848T Power Supply Connections The transmitter requires between 9 and 32 VDC to operate and provi de complete functionality . The DC power supply should provide power with less than 2% ripple .
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-8 GROUNDING The 848T transmitter provides input/output isolation up to 62 0 V rms. NOTE Neither conductor of the fieldbus se gme nt can be grounded. Grounding out one of the signal wires will shut down the entire fieldbus segment.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 2-9 Rosemount 848T Grounded Thermocouple Input s 1. Ground sensor wiring shield (s) at the senso r . 2. Ensure that the sensor wiring and si gnal wiring shields are electrically isolated from the tr ansmitter enclosure.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-10 SWITCHES Figure 2-8. Switch Location on the Rosemoun t 84 8 T Security After configur ing the transmitter , the data can be pr otected from unwarranted changes.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 2-1 1 Rosemount 848T T AGGING Commissioning T ag The 848T has been supplied with a removable commissioning ta g that contains bo th the Device ID.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 2-12 INST ALLATION Using Cable Glands Use the following steps to insta ll the 848T with Cable Glands: 1.
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Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Section 3 Configuration Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 3-1 Configuration . . . . . . . . . . . . . . . . .
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-2 CONFIGURATION St andard Each F OU NDATION fieldbus configuration tool or host system has a differ en t way of displaying and performing configurations.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-3 Rosemount 848T Alarms Use the following steps to configur e the alarms, which are located in the Resource Function Block.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-4 6. Set the De adband from 0 to 90 %. This thre shold is used to clear th e PV status. 7. Set S tatus Priority . This determi nes wh at happens wh en the specific limit has been exceeded.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-5 Rosemount 848T Monitoring Application with a Single Se lection Example: Aver age exhaust temperature of gas and tu rbine where there is a single alarm level for all inputs. 1. Link the MAI outputs to the ISEL inputs.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-6 Interfacing Analog T ransmitters to F OUNDATION fieldbus T ransducer Block Configurat io n Use the sensor configuration method to set th e sensor type to m V – 2-wire for the applicab le transducer block or fo llow these steps.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-7 Rosemount 848T BLOCK CONFIGURATION Resource Block The resource block defines the physical resources of the device including type of measurement, memory , etc. The resource block also defines functionality , such as shed times, that is common across multiple block s.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-8 28 FA U LT _ S TA T E Condition set by loss of communication to an o utput block, fault promoted to an output block or physical contact. When F AIL_ SAFE condition is set, then out put function blocks will perform their F AIL_SAFE actions.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-9 Rosemount 848T 60 DEFINE_WRITE_LOCK Allows the o perator to select how WRIT E_LOCK behaves. The init ia l value is “lock everything”.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-10 Block Errors T able 3-3 lists conditions reporte d in the BLOCK_ ERR parameter .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-1 1 Rosemount 848T Out of Service (OOS) The block is not processing it s tasks. When the resource block is in OOS, all blocks within the re source (device) are forced into OOS. The BLOCK_ERR parameter shows Out of Se rvice.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-12 T able 3-5. Failure Alarms F AILED_MASK This parameter will mask any of th e failed conditions listed in F AIL ED_ENABLED. A bit on means that th e condition is m asked out from alarming and will not be reported.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-13 Rosemount 848T T able 3-6. Maintenance Alarms/Priority Alarm MAINT_MASK The MAINT_MASK parameter will mask any of th e failed conditions listed in MAINT_ENABLED. A bit on means th at the condition is masked out from alarming and will not be reported.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-14 ADVISE_MASK The ADVISE_MASK parameter wi ll mask any of the failed conditions listed in ADVISE_ENABLED. A bit on means t he condition is masked out from alarming and will not be reported.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-15 Rosemount 848T NOTE If status is set up to flag failure/warnin g you will see associated sensor degraded or failur e alert. T ransducer Blocks The transducer block allows the user to view a nd manage the channel information.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-16 T ransducer Block Channel Definitions The 848T support s multiple sensor input s. Each input has a channel assigned to it allowing an AI or MAI Function Bl ocks to be linked to that input.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-17 Rosemount 848T T a ble 3-9. Blo ck/T ransduc er Error T ransducer Block Modes The transducer block suppo rts two modes of operation as defined by th e MODE_BLK para meter: Automatic (Aut o) The block output s reflect the analog input measurement.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-18 12 COLLECTION_DIRECTORY A directory that specifies the number , starting indices, and DD Item ID’s of the data collections in each transducer block. 13 SENSOR_1_CONFIG Sensor Configuration Parameters.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-19 Rosemount 848T Changing the Sensor Configura tion in the T ransducer Block If the F OUNDA TION fieldbus conf iguration tool or host system d.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-20 T ransducer Block Sub-Parameter T ables T able 3-1 1. XD_ERROR Sub-Paramete r S tructure T a ble 3-12.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-21 Rosemount 848T T able 3-13. SENSOR_ST A TUS Sub-Paramete r S tructure T able 3-14. SENSOR_CAL Sub-Paramete r S tructure T able 3-15.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-22 T able 3-17. DUAL_SENSOR CONFIG Sub-Parameter St r u c t u r e T able 3-18. DUAL_SENSOR_ ST A TUS Sub-Parameter St r u c t u r e T able 3-19.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 3-23 Rosemount 848T T able 3-20. V alidation Config Sub-Paramete r S tructure Sensor Calibration in the Sensor T ransducer Block If the F OUNDATI.
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Reference Manual 00809-0100-46 97, Rev EA October 2011 Rosemount 848T 3-24 1. Under SENSOR_CALIB, the SENSO R_NUMBER to the number of the sensor to c alibrate. 2. Set CALIB_UNIT to calibration unit. 3. Set CALIB_METHOD to User T rim (seeT able 3-8 on page 3-16 for valid values).
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Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Section 4 Operation and Maintenance Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age 4-1 Foundation fieldbus Information . .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T 4-2 T able 4-1. Block Diagram for the Rosemount 848T Commissioning (Addressing) T o be able to setup, configure, and ha ve it communicate with other devices on a segment, a device must be assigned a permanent address.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 4-3 Rosemount 848T HARDWARE MAINTENANCE The 848T has no moving p arts and requires a min imal amount of scheduled maintenance. If a malfunction is susp ected, check for an extern al cause before performing the diagn ostics presented below .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T 4-4 T ROUBLESHOOTING F OUNDATION fieldbus Resource Block T ransducer Block T roubleshooting Symptom Possible Cause Corrective Acti.
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Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Appendix A Reference Dat a Functional Specificat ions . . . . . . . . . . . . . . . . . . . . . . . . . page A-1 Physical Specifications . . . . . . . . . . . . .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-2 T ran sient Protect ion The transient protecto r (option code T1) helps to prevent dam age to the transmitter from transie nts induced on the loop wiring by lightn ing, welding, heavy electrical equipment, or switch ge ars.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 A-3 Rosemount 848T PHYSICAL SPECIFICATIONS Mounting The Rosemount 848T can be moun ted directly onto a DIN rail or it can be ordered with an optional junctio n box. When using the optional junction box, the transmitter can be mo unted onto a p anel or a 2-in.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-4 FUNCTION BLOCKS Analog Input (AI) • Processes the measurement and makes it available on the fieldbus segment.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 A-5 Rosemount 848T Accuracy Differential Co nfiguration Notes Differential capability exist s between any two se nsor types.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-6 Analog Sensors 4–20mA T wo types of 4–20 mA sensors are compatible with the Rosemount 848T . These types must be orde red with the S002 option code comp lete with an analog connector kit.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 A-7 Rosemount 848T Ambient T emperature Effect T ransmitter may b e installed in locations wher e the ambient temperat ure is between -40 and 85 ° C (-40 and 185 ° F) T able 3. Ambient T emperature Effects NIST T ype Accuracy per 1.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-8 Ambient T emperature Notes Examples: When using a Pt 100 (  = 0.00385 ) sens or inpu t at 30 °C amb ien t temperature: • Digital T emperature Ef fects: 0.003 °C x (30 - 20) = .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 A-9 Rosemount 848T Aluminum/Plastic Juncti on Box—Cable Gland (opt ion codes JA2 and JP2) Dimensions are in in ches (millimeters) St ainless Steel Junction Box—Ca ble Gland (option code JS2) Dimensions are in inches (millimeters) T op View 3-D V iew Front V iew Side View 4.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-10 Aluminum/Plastic Juncti on Box—Conduit Entry (opt ion codes JA3 and JP3) Dimensions are in inches (millimeters) St ainless Steel Junction Box—Con duit Entry (option code JS3) Dimensions are in inches (millimeters) T op View 3-D Vi ew Front Vi ew Side V iew 10.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 A-1 1 Rosemount 848T Mounting Options Aluminum/Plastic Junction Box (styles JA and JP) St ainless Steel Junction Box (style JS) Front V iew Side .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-12 ORDERING INFORMATION T a ble A-1. Rosemoun t 848 T F OUNDATION fiel dbus Ordering Information ★ The S tandard offering represents the most common options. The st arred options ( ★ ) should be selected for best delivery .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 A-13 Rosemount 848T Enclosure Options Standa rd Stan da rd JP1 Plastic Junction Box; No Entries ★ JP2 Plastic Box, Cable Glands (9 x M20 nickel-plat e d brass glands for 7.5–1 1.9 mm unarmored cable) ★ JP3 Plastic Box, Conduit Entries (5 Pl ugged Holes, suitable for installing 1 / 2 -in.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T A-14.
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Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Appendix B Product Certificates Hazardous Locations Certificates . . . . . . . . . . . . . . . . . . . p age B-1 Intrinsically Safe and Non-Incendive Installations .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-2 IE FISCO (Fieldbus Intrinsically Safe Concept) Intrinsic Safety Intrinsically safe for use in Class I, Di vision 1, Groups A, B, C, D; when installed in accorda nce with Rosemount Drawing 00848-4404.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 B-3 Rosemount 848T Canadian St andards Association (CSA) Certifications E6 Explosion-Proof and Dust Ignition-Proof Class I, Division 1, Groups B, C, and D. Class II, Division 1, Groups E, F , and G .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-4 N6 Class I, Division 2 Suitable for use in Class I, Division 2, Groups A, B, C, D.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 B-5 Rosemount 848T Specia l Conditions for Safe Use (x): 1. This app aratus must be installed in an encl osure which af fords it a degree of protection of at least IP20. Non-metallic enclosures mus t have a surface resist ance of less than 1Gohm .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-6 Specia l Conditions for Safe Use (x): 1. Provisions shall be made, external to the ap paratus, to prevent the rated voltage of the ap paratus supply is not exceeded by transien t disturbances of more than 40% 2.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 B-7 Rosemount 848T Specia l Conditions of Safe Use (x): 1. The component must be house d in a suitable certified enclosure. 2. Provisions shall be made, external to the ap paratus, to prevent the rated voltag e (42.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-8 N7 IECEx T ype n Approval Certificate No.” IECExBAS09.0032X Ex Na nL IIC T5 (T amb = – 40 to 65 °C) NOTE: N7 is valid with S001 and S002 Input T ypes Specia l Conditions of Safe Use: 1.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 B-9 Rosemount 848T China (NEPSI)Certifications I3 Intrinsic Safety Ex ia IIC T4 Certification Number: GYJ1 1 1365X Special Conditions for Safe Use (x): 2.1. Only when temperature transmitter is in st alled in IP 20(GB4208-2008 ) ho using, it could be used in hazardous location.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-10 2.7. End users are not permitted to change any component’s insid es, but to settle the problem, in conjunction with manufactu rer to avoid damage to the pro duct. 2.8. During insta llation, use and main tenance of this product, observe following standards: GB3836.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 B-1 1 Rosemount 848T INTRINSICALLY SAFE AND NO N-INCENDIVE INSTALLATIONS Safe Area Zone 2 (category 3) Zon e 1 (category 2) Zone 0 (category 1) A.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-12 INST ALLATION DRAWINGS The installatio n guidelines presented by the drawings must be followed in order to maint ain ce rtified ratings for in stalled transmitters.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 B-13 Rosemount 848T Figure B-1. FM Intrinsic Safety/ FISCO Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-14 Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 B-15 Rosemount 848T Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-16 Figure B-2. CSA Intr insic Safety/ FISCO Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 B-17 Rosemount 848T Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T B-18 Electronic Master – PRINTED COPIES ARE UNCONTROLLED – Rosemount Proprietary.
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Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Appendix C F OUNDATION ™ fieldbus T echnology Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . p age C-1 Function Blocks .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T C-2 The Fieldbus F OUNDATION has established the function blocks by defining a small set of parameters used in all function bloc ks called universal paramete rs.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 C-3 Rosemount 848T DEVICE DESCRIPTIONS Device Descriptions (DD) ar e sp ec ified too l def init i on s that are as sociated with the Resou rce and Transducer Blocks. D evice description s provide the definition and description of the fu nction bl ocks and their parameters.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T C-4 T wo types of alerts are defined for the block: event s and alarms. Events are used to report a st atus change when a bl ock le aves a particu lar sta te, such as when a parameter crosses a threshold.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 C-5 Rosemount 848T There may be many LM devices on a segment but only the LAS is actively controlling communication traffic. The remaining LM devices on the segment are in a stand- by state, ready to take over if the primar y LAS fails.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T C-6 Backup LAS A LM device is one that has the ability to control the communic ations on the bus. The LAS is the LM capable de vice th at is currently in control of the bus. While there can be many LM devices acting as backups , the re can only be one LAS.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 C-7 Rosemount 848T Figure C-4 diagra ms the m ethod of s cheduled da ta transfer . Schedule d data transfers ar e typically use d for the reg ular cyclic trans fer of proc ess loop data between devices on the fieldbus.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T C-8 Function Block Scheduling Figure C-6 shows an example of a link schedule. A single iteratio n of the link-wide sched ule is called the macrocyc le. When the system is configured and the function blocks are linked, a ma ster lin k-wide sche dule is create d for the LAS.
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Reference Manual 00809-0100-4 697, Rev EA October 2011 Rosemount 848T www .rosemount.com Appendix D Function Blocks Analog Input (AI) Function Block . . . . . . . . . . . . . . . . . . . p age D-1 Multiple Analog Input ( MAI) Function Block . . . . . .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-2 10 XD_SCALE None The high and low scale va lues, engineering units code, and number of digits to the right of the decimal point associ ated with the channel input value. The XD_SCALE units code must match the uni ts code of the measurement channel in the transducer block.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-3 Rosemount 848T Functionality Simulation T o support testing, either change the mode of the block to man ual and adjust the output value, or enable simulation through the configur ation tool and manually enter a va lue for the measurement value and its st atus.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-4 Figure D-2. Analog Input Function Block Schematic Filtering The filtering fe ature changes the response time of the device to smooth variations in output readings caused by rapid changes in input.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-5 Rosemount 848T Indirect Square Root Indirect Square Root signal co nversion takes the square root of the value computed with the ind irect signal conversion and scales it to the range an d units of the PV and OUT parameters.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-6 Modes The AI Funct ion Block su pports three mode s of opera tion as defin ed by the MODE_BLK para meter: Manual (Man) The val.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-7 Rosemount 848T St atus Handling Normally , the status of the PV reflect s the status of the measurement value, the operating co ndition of the I/O card , and any active ala rm condition. In Auto mode, OUT reflect s the value and status quality of the PV .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-8 Application Information The configuration of the AI function bl ock and its associated ou tput channels depends on the specific application.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-9 Rosemount 848T MULTIPLE ANALOG INPUT (MAI) FUNCTION BLOCK The Multiple Analog Input (MAI) function block has th e ability to process up to eight field device measur ements and make them available to other function blocks.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-10 Functionality Simulation T o support testing, either change the mode of the block to man ual and adjust the output value or e.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-1 1 Rosemount 848T Figure D-3. Multiple Analog Input Function Block T iming Diagram Figure D-4. Multiple Analog Input Function Block Schematic Filtering The filtering fe ature changes the response time of the device to smooth variations in output readings caused by rapid changes in input.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-12 Indirect Indirect sign al conversio n converts the signal linearly to the accessed channel input value (or the simulated value when simulation is enabled) from its specified ra nge (XD_SCALE) to the ra nge and unit s of the PV and OUT parame ters (OUT_SCALE).
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-13 Rosemount 848T Modes The MAI Function Blo c k su pp ort s three modes of ope ration as defined by the MODE_BLK para meter: Manual (Man) The .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-14 Application Information The intended use for this type of functi on block is for applications where the sensor type s and func tionality of ea ch channel (i.e. the simula te, scaling, filtering, alarms type, an d optio ns) are the same.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-15 Rosemount 848T INPUT SELECTOR FUNCTION BLOCK The Input Selector (ISEL) function block can be use d to select the first good, Hot Backup, maximum, minimum, o r average of as many as eight in put values and place it at the output.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-16 15, 16, 17, 18, 29, 30, 31, 32 DISAB LE_(1, 2 , 3, 4, 5, 6, 7, 8) None A connection from another block that disables the associated inp ut from the selection. 19 SELECT_TYPE None S pecifies input selection met hod.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-17 Rosemount 848T Functionality Figure D-5. Input Selector Function Block Schematic Block Errors T able D-7 lists conditions reported in the BLOCK_ERR parameter . Conditions in bold are inactive for the ISEL block and are given for reference.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-18 Modes The ISEL function block suppor ts three modes of operation as defined by the MODE_BLK para meter: Manual (Man) The block output (OUT) m ay be set manually . Automatic (Aut o) OUT reflects the select ed value.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 D-19 Rosemount 848T Block Executio n The ISEL function block reads the values an d status of up to eight input s.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T D-20 Figure D-6. Input Selector Function Block Application Example (SEL_TYPE = max) Figure D-7.
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Index-1 Rosemount 848T Numerics 2-Inch Pipe Stand Mounting . . . . . . . . . . . . . 2-3 A Alarms Configuration . . . . . . . . . . 3-3 Analog Input Configuration . . . . . . . . . . 3-6 Ground . .
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Reference Manual 00809-0100- 4697, Rev EA October 2011 Rosemount 848T Index-2 Modes . . . . . . . . . . . . . D-18 Automatic . . . . . . . . D-18 Manual . . . . . . . . . D-18 Out of Servi ce . . . . . D-18 Parameters . . . . . . . . . . D-15 Status H andling .
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St andard T erms and Condition s of Sale can be found at www .rosemount.com/terms_of_sale The Emerson logo is a trademark and ser v ice mark of Emerson Electric Co. Rosemount and the Rosemount log otype are registered tradema rks of Rosemount Inc. SuperModule and Coplanar are trademarks of Ro semount Inc.

Read the Emerson 848T manual - avoid problems

An important point after buying a device Emerson 848T (or even before the purchase) is to read its user manual. We should do this for several simple reasons:

to know how to properly use the device
to know how to perform maintenance/ periodic checks of correct operation of the product Emerson 848T
to know what to do in case of failure Emerson 848T

If you have not bought Emerson 848T yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Emerson 848T - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Emerson 848T you will learn all the available features of the product, as well as information on its operation. The information that you get Emerson 848T will certainly help you make a decision on the purchase.

If you already are a holder of Emerson 848T, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Emerson 848T.

However, one of the most important roles played by the user manual is to help in solving problems with Emerson 848T. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Emerson 848T along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center

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