Emerson 848L - Manuals

Reference Manual 00809-0100-4696, Rev AASeptember 2004 1-3 Rosemount 848L Appendix A: Specification and Reference Data • Specifications • Dimensional Drawings • Ordering Information Appendix B: Product Certificates • Hazardous Locations Certificates • Intrinsically Safe and Non-Incendive Installatio...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Section 2 Installation Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1Wiri...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 2-2 Mounting to a DIN Rail Without an Enclosure To mount the 848L to a DIN rail without an enclosure, follow these steps: 1. Pull up the DIN rail mounting clip located on the top back side of the transmitter. 2. Hinge the DIN rai...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 2-5 Rosemount 848L Figure 2-4. “Bus” location on the Rosemount 848L Input/Output Power: The discrete I/O requires a 9-32VDC power supply that is separate from the fieldbus power. The voltage level will depend on the type of sensors being used an...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 2-6 Security After configuring the transmitter, the data can be protected from unwarranted changes. Each 848L is equipped with a security switch that can be positioned “ON” to prevent the accidental or deliberate change of config...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 2-7 Rosemount 848L I/O WIRING 848/848L/848L_10_AA, 84 8L_1 1_A A, 848L_12_AA , 848L_13_A A, 848L_14_AA .E P S DISCRETE INPUT WIRING CONFIGURATION 2-Wire NAMUR Sensors 1 of 2 Input Connectors Dry Contact Switches 1 of 2 Input Connectors 3-Wire NA...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 2-8 TAGGING Commissioning Tag The 848L is supplied with a removable commissioning tag that contains both the Device ID (the unique code that identifies a particular device in the absence of a device tag) and a space to record the...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 2-9 Rosemount 848L TRANSMITTER LABEL Figure 2-7. Transmitter Label INSTALLATION Using Cable Glands Use the following steps to install the 848L with Cable Glands: 1. Remove the junction box cover by unscrewing the four cover screws. 2. Run the se...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 2-10 Using Conduit Entries Use the following steps to install the 848L with Conduit Entries: 1. Remove the junction box cover by unscrewing the four cover screws. 2. Remove the five conduit plugs and install five conduit fittings...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Section 3 Configuration Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1Gen...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 3-5 Rosemount 848L SOFT WRITE LOCK and HARD WRITE LOCK Inputs to the security and write lock functions include the hardware security switch, the hardware and software write lock bits of the FEATURE_SEL parameter, the WRITE_LOCK parameter, and th...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 3-6 PlantWeb ™ Alarms The Resource Block will act as a coordinator for PlantWeb alarms. There will be three alarm parameters (FAILED_ALARM, MAINT_ALARM, and ADVISE_ALARM) which will contain information regarding some of the devic...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 3-7 Rosemount 848L MAINT_ALARMS A maintenance alarm indicates the device or some part of the device needs maintenance soon. If the condition is ignored, the device will eventually fail. There are five parameters associated with MAINT_ALARMS, the...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 3-8 ADVISE_ACTIVE The ADVISE_ACTIVE parameter displays which of the advisories is active. Only the advisory with the highest priority will be displayed. This priority is not the same as the ADVISE_PRI parameter described above. T...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 3-9 Rosemount 848L Alarms Use the following steps to configure the alarms, which are located in the Resource Block. 1. Set the resource block to OOS. 2. Set WRITE_PRI to the appropriate alarm level (WRITE_PRI has a selectable range of priorities...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 3-10 The 848L can force the outputs to a predetermined state in the event of a device malfunction. The following procedure can be used to set the fail safe condition for each output: 1. Set MODE_BLK.TARGET to OOS 2. For each Outp...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 3-12 The following characters are allowed in a logic equation: • Uppercase and lowercase alphabet, case insensitive, used to specify functions • Digits 0-9, used to specify channel numbers and unsigned integer constants • Comma, ...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 3-13 Rosemount 848L PS - When the hardware input consists of a continuous train of pulses at a rate less than 500 PPS, a prescaler can be used to reduce the pulse rate to something that does not change faster than the equation evaluation rate. T...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 3-14 EQ - Channels 17-32 are set by the result of an equation specified by up to 80 characters and stored in parameter EQx, where x is the equation number. The equation results are available as a discrete value and status in para...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 3-15 Rosemount 848L Logic Functions A function has a name and a set of one or more arguments contained within a closed set of parentheses. The seven channel reference functions (IN, ICF, ICR, PS, DO, EQ, and OUT) have been described above. These...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 3-16 Logic Operator Functions The following combinatorial operators require a minimum of 2 and a maximum of 10 functions between the parentheses, each separated by a comma. AND ( ) - Performs the logical ‘and’ of the argument fun...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 3-17 Rosemount 848L Counter Functions CTU (clock, reset, target)- The parameters clock and reset are functions. The target is a 16 bit constant. Whenever reset is true, the internal counter is set to zero and the value of the function is false. ...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 3-18 TP (power, target) - Whenever power transitions from false to true, the value of the internal timer is set to the target and the value of the function is true. The value of the function will become false after the target amo...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 3-19 Rosemount 848L SHR (input, shift, reset, testbit) - The parameters input, shift and reset are functions. The parameter testbit is a constant that is constrained to be in the range of 1 to 8. The reset function is optional. If reset is prese...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L 3-20 Logic Execution Timing The Logic transducer block reads the hardware inputs, processes the equations and drives the outputs on a continuous cycle. The cycle time or frequency of execution will vary depending on the number an...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 3-21 Rosemount 848L Simulation Simulation replaces the channel value coming from the transducer block for testing purposes. The following procedure is used to simulate a DI output. To change the output value place the Target Mode of the block to...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Section 4 Operation and Maintenance Safety Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 4-1Foundation Fieldbus Information . . . . . . . . . . . . . . . . . . . page 4-1Hardware...

Reference Manual 000809-0100-4696, Rev AA September 2004 Rosemount 848L 4-2 Commissioning (Addressing) To be able to setup, configure, and have a device communicate with other devices on a segment, a device must be assigned a permanent address. Unless requested otherwise, it is assigned a temporary ...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Appendix A Reference Data Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-1Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-5Ordering...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L A-2 Outputs 4 Discrete Outputs 9-32 VDC loads Maximum load inductance 300 mH Current Ratings: 1.0 A maximum for single channel on, 4.0 A maximum per device. Output devices must be selected as follows: 1. Designed to use the same ...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 A-3 Rosemount 848L Isolation Input-Output 1200 VDC; 600 V rms 50/60 Hz for dry and 2-wire NAMUR contact inputsNo isolation when using 3-wire sensors Input- Foundation Fieldbus 1200 VDC; 600 V rms 50/60 Hz Output- Foundation Fieldbus 1200 VDC; 60...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 A-5 Rosemount 848L EXAMPLE FOR THE LOGIC EXECUTION: This diagram shows motor starter logic with start and stop buttons and an auxiliary contact which maintains current after the start button is pressed. Which would translate to a Boolean equatio...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Appendix B Product Certifications Approved Manufacturing Locations . . . . . . . . . . . . . . . . . page B-1European Directive Information . . . . . . . . . . . . . . . . . . . . page B-1Hazardous Locations Cert...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L B-2 European Approvals CENELEC Approvals N1 CENELEC Type nCertification Number: Baseefa04ATEX0027XATEX Marking II 3 G EEx nA nL IIC T4 (T amb = –40°C to 50°C) Power/BusMax Supply Voltage = 32.0 V Special Conditions for Safe Use (...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Appendix C Function Blocks Resource Block Parameters . . . . . . . . . . . . . . . . . . . . . . . page C-1I/O Transducer Parameters . . . . . . . . . . . . . . . . . . . . . . . . page C-5Logic Transducer Parame...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L C-8 LOGIC TRANSDUCER PARAMETERS Table C-3. Logic Transducer Parameters and Descriptions Number Parameter Description 1 ST_ REV The revision level of the static data associated with the function block. 2 TAG_ DESC The user descrip...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 C-9 Rosemount 848L DISCRETE INPUT BLOCK The DI takes the manufacturer’s discrete input data, selected by channel number, and makes it available to other function blocks as its output. The output will have a value of either true or false along wi...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 C-13 Rosemount 848L Table C-6. Parameters and Description MULTIPLE DISCRETE OUTPUT BLOCK The MDO block makes available to the I/O subsystem its eight input parameters IN_D1/8. This function block keeps the fault state features specified for the ...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Appendix D Logic Equation Syntax Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page D-4Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Appendix E Motor Control Introduction to Motor Control . . . . . . . . . . . . . . . . . . . . . . page E-1Variations on Motor Control . . . . . . . . . . . . . . . . . . . . . . . page E-2Writing 848L Equations ...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L E-2 The contactor is never controlled with a toggle switch, because that would leave one side of the solenoid electrically hot when the motor overload trips. Standard procedure calls for start and stop push buttons in combination...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L E-4 Timed Switch The pumps have a known life time within an acceptable risk, so one pump is allowed to run until that time expires. The other pump automatically takes over at that time. Switch on Failure If a process condition ca...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 E-5 Rosemount 848L Interlock An interlock switch is easily added as follows, where input 4 is the normally closed interlock: | || 1 2 4 Out1 |+--| |--+--||--+--|/|-----------------( )--+ OUT1_EQ| | | || | 3 | || +--||--+ || | • The first express...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 E-7 Rosemount 848L Maximum Restarts A large motor is too expensive to replace if it burns up because the operator wanted to give it another try, when in fact the pump was jammed. The life of the contactor is also shortened when it has to interru...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L E-10 Intermediate Stop A reversible motor requires two contactors. One of them swaps two of the motor wires so that it will run in the opposite direction. The contactors must never be closed at the same time, because that would p...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L E-14 Redundant Motors - Switch on Failure Again, there are redundant pumps. There is a pressure switch in the common discharge line. If the pressure falls then the other pump is started. If the pressure does not recover, possibly...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 Rosemount 848L www.rosemount.com Appendix F Valve Control Introduction to Valve Control . . . . . . . . . . . . . . . . . . . . . . page F-1 INTRODUCTION TO VALVE CONTROL Industrial valves have two general classifications, regulating and block. ...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L F-2 There are at least three permutations of any valve circuit: 1. Steady or pulse output to the pilot solenoid (or whatever, piezoelectric bars are in use). Steady requires one output, pulse requires two. 2. Confirmed position s...

Reference Manual 00809-0100-4696, Rev AASeptember 2004 F-3 Rosemount 848L Double Block and Bleed If the valve absolutely must not leak into the process, then two valves are put in series and the short pipe between them is vented (bled) to an appropriate place. The bleed valve must be shut before the...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L F-4 Open-Auto-Close Those applications that use a local switch with automatic control have a three position switch arranged as Open-Auto-Close. Inputs 1 and 2 are used for confirms, so input 3 is used for Open and input 4 for Clo...

Reference Manual 00809-0100-4696, Rev AA September 2004 Rosemount 848L F-6 Double Block and Bleed Certain materials must not leak through a valve that is supposed to be shut. Three valves are arranged in a leak-proof configuration as shown: All three valves are spring return. V1 and V2 return to clo...

Reference Manual 00809-0100-4696, Rev AA9/17/04 Rosemount 848L www.rosemount.com Index Numerics 2-Inch Pipe Stand Mounting . . . . . . . . . . . . . . . . . . 2-3 A ADVISE_ACTIVE . . . . . . . . . . . . . 3-8 ADVISE_ALM . . . . . . . . . . . . . . . . 3-8 ADVISE_ENABLED . . . . . . . . . . . 3-7 ADV...