MTS Systems Level Plus Operation And Installation Manual
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MTS Systems Level Plus Operation And Installation Manual

Dda tank gauge monitor
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DDA Tank Gauge Monitor
Operation Guide and Installation Manual
DDA Tank Gauge Monitor
550421 Revision C

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  • Page 1 L e v e l P l u s ® DDA Tank Gauge Monitor Operation Guide and Installation Manual DDA Tank Gauge Monitor 550421 Revision C...

  • Page 2: Table Of Contents

    Procedure for Calculating Volume Correction Factors (VCF) Typical RS232 Printer Connections Scan Rate Calculation Procedure EPROM Replacement Procedure Connecting Level Plus DDA monitor to MTS LPS80 Software System Level Plus Monitor Modbus Register Maps NOTICE TO USER: See section 9 of this manual for important information...

  • Page 3: Introduction

    Introduction The Level Plus® DDA monitor is an industrial quality microprocessor based data acquisition and display system for use with the Level Plus DDA tank gauges. In its standard form, the monitor performs the following functions: • Provides intrinsically safe power and communications to the tank gauges (up to 8) •...

  • Page 4: General Software Information

    OUTPUTS Figure 2. Level Plus DDA Monitor Software Structure In addition to the advanced processing environment offered by the Level Plus system, the soft- ware also supports a high degree of programmability, allowing the user to configure the system to satisfy particular needs. The programming software is user friendly and allows the user to alter many system parameters.
  • Page 5 Communications The Level Plus monitor is available with either EIA 485 or EIA 232 communications hard- ware for communications with external host equipment. The user can program both baud rate and communication address parameters.The software also supports a data logger mode allowing gauge data to be sent to a serial interface printer at scheduled intervals.
  • Page 6 MTS Side Tank Indicator (STI) Support MTS DDA Side Tank Indicator modules can be connected to the Level Plus monitor sys- tem to provide display of tank data at remote locations. The devices are multidropped on the 4-wire MTS DDA network and can be located physically anywhere along the main cable run.
  • Page 7 signals the user when volume data is invalid. For example, loss of temperature data or gauge input data that exceeds allowable limits for API table entries would cause invalid volume data. Additional information on error messages and the use of the keypad to dis- play different types of volumetric data can be found in the PROGRAMMING section of this manual.
  • Page 8 API Table Information This section includes information on the constants used by the software to calculate the volume correction factors and valid ranges for the API (density) and temperature data. Crude oils (Table 6A) Constants: K0 = 341.0957 K1 = 0.0 Valid temperature ranges Valid gravity ranges (API) 0 to +300.0 deg F...

  • Page 9: Model Number Information

    Model Number Information Model Number: Level Plus DDA Monitor LEVEL PLUS DDA MONITOR POWER SUPPLY INPUT 0 = 115 V 1 = 230 V ENCLOSURE 1 = NEMA 1 Indoor Enclosure (w/4-20 mA outputs) 2 = NEMA 1 Indoor Enclosure...

  • Page 10: Level Plus Tank Monitor Specification

    Level Plus Tank Monitor Specifications Parameter Specification Power Consumption • NEMA 1: 60 Watts maximum @ 120 VAC, 50/60 Hz, fuse protected • NEMA 4X and 7 (with internal heater): 260 Watts maximum @ 120 VAC, 50/60 Hz, fuse protected •...

  • Page 11: Monitor Installation And Electrical Terminations

    3. 650567 - Field wiring Level Plus DDA Monitor 4. 650561 - Terminal block identification Level Plus DDA Monitor 5. 650511 - Wiring diagram intrinsically safe DDA Liquid Level Also reference MTS Level Plus DDA Gauge Manual #550164 for additional information about DDA Tank Gauge installation requirements.

  • Page 19: The Control Panel

    The Control Panel The Level Plus control panel is shown in Figure 3. Level Plus ¤ Tank Monitoring System Power Alarm ± ± Mode Mode Clear Clear • • Enter Enter Fnctn Fnctn Figure 3. Level Plus Control Panel The control panel includes LED’s for power and alarm indication, a LCD screen displaying 4 lines of 20 characters each, 12 numeric keys, and 4 control keys.
  • Page 20 The four control keys are primarily used to enter parameters and move to differ- ) X ? W & ? g O @ f W 2 6 X ? @ h e ? @ 1 ? 7 @ ? W 2 6 K O 2 @ @ W 2 6 X 7 <...

  • Page 21: Keypad Control Functions

    During measurement mode the keypad allows the user to control the different display modes supported by the Level Plus Monitor software. In addition, the user can use the keypad to over- ride the default scan order and access individual tank gauge measurement data directly. This sec- tion describes the key functions that are currently supported.
  • Page 22 “++” characters indicate HARDWARE scan hold is active. Level Plus Screen - HARDWARE SCAN HOLD ACTIVE During hardware SCAN hold other tank gauges can be selected by depressing their respective numeric key (i.e. “4” for gauge #4). The hardware SCAN hold function is deactivated by depress- ing the “+/-”...
  • Page 23 I N T L O T M P H I Mode #4 Volume Display If the Level Plus is programmed for volume mode, basic level/temperature information can be displayed using mode #5. T A N K # 1 : 9 6 . 6 6 7 i n .
  • Page 24 Gross ullage volume and gross total volume information (Mode #7) can be displayed by depress- ing the FNCTN key and the numeric “7” key. See example. # 1 1 1 2 . 9 9 i n 8 0 . 5 °F G O V U 9 9 9 9 9 9 9 G A L...

  • Page 25: Error Message Descriptions

    System Error Message Descriptions The Level Plus software displays several error messages that typically reflect system problems. The possible system error messages are described below. Error messages are grouped into two categories: error messages associated with data communica- tions with the DDA tank gauges and error messages associated with system operations.
  • Page 26 Possible cause for the *PRGRM ERR system error message include: A. The Level Plus monitor 'number of floats' parameter is set equal to 2 floats and the DDA tank gauge internal 'number of floats' parameter is programmed for 1 float.
  • Page 27 *AVG ERR - Average submerged temperature could not be calculated. Possible causes for the *AVG ERR system error message include: A. DDA tank gauge product float below lowest positioned RTD. B. DDA tank gauge detected error from individual RTD reading. C.
  • Page 28 CTS line is low for more than 5 seconds, the above message is displayed for 3 seconds and the current print buffer is purged. The Level Plus will try to print again at the next scheduled print interval. This error message will only appear if the Level Plus is programmed for printer mode.
  • Page 29 *CALC ERR - Math calculation error encountered (i.e. underflow or overflow result). Possible causes for the *CALC ERR message include: A. Resultant value exceeds allowable range (i.e. volume value greater than 999,999,999) B. Negative volume calculated. C. Division by zero. *VCF ERR - VCF parameter (API or TEC) exceeded allowable range for selected volume tables (6A, 6B, 6C, 6CMOD).
  • Page 30 B. Excessive noise on the RX/TX communication wires. C. Malfunctioning STI module. *CSE - Checksum Error. The CSE error indicates that Level Plus monitor received a check- sum calculation NAK from the STI module. Possible causes for the *CSE error message include: A.

  • Page 31: Pre Start Up Check List

    Field Wiring Installation section of the STI manual (MTS P/N 550436). Ensure that all installation drawing notes and requirements have been completed. 4. If the Level Plus system is installed in a hazardous area, double check to insure that all hazardous area requirements have been completed.
  • Page 32 Starting Up Turn on power to the monitor. The main power switch is located behind the front cover below the keypad/display assembly. The green power LED lights and the screen displays an initialization message. M T S L E V E L P L U S T A N K M O N I T O R S Y S T E M m o - d a y - y r h r - m i n - s e c...

  • Page 33: Programming The Level Plus

    After the security code has been entered properly, the system will display a WARNING message indicating that all processes in the Level Plus monitor will be stopped. See below. If the user con- tinues into program mode by pressing the “ENTER” key, all scanning of tank gauge data will stop and all output controls will go to user defined default status.
  • Page 34 (4-20mA) outputs. The VOLUMETRIC parameters deal only with the optional volumetric correction software. It is important for the programmer to understand that the Level Plus program- ming software qualifies many submenu screens based on previous screen settings. For example, if the tank gauge temperature function is not enabled, subsequent screens like temperature high alarm (TMPHI) would not be displayed.
  • Page 35 ? W 2 @ 6 X e @ @ @ @ @ ? W 2 @ 6 X ? e @ ? e ? @ ? @ @ @ @ 6 X ? @ ? ? @ @ @ @ @ @ @ e ? @ ( ? 7 <...
  • Page 36 parameters or VOLUMETRIC parameters, press "2" (or ENTER) and proceed past the TANK para- meter edit screens (see programming flow chart). Proceed to the applicable section in this manual based on the selected item from the edit selection menu. System parameters - proceed to section 12 Tank parameters - proceed to section 13 Side Tank Indicator parameters - proceed to section 14 Analog parameters - proceed to section 15...

  • Page 37: System Parameters

    You are given the opportunity to change your access codes. Security access codes are used to limit access to program mode and Level Plus mass stabilization mode. There are three different codes available. Security code #1 is used to limit access to program mode.
  • Page 38 Your new code will be displayed, press the ENTER key to confirm or the MODE key to change. S E C U R I T Y C O D E # 1 C H A N G E D T O : ‘...
  • Page 39 The default display mode allows the user to program which of the 7 display modes will be active after the Level Plus has been initialized following a power off condition (or a programming session). Press the MODE or ± key to select one of the available choices.
  • Page 40 ‘ E n t e r ’ T O C O N T I N U E NOTE After changing the clock time base, the power must be temporarily removed from the Level Plus monitor to activate the new selection. This can be done by cycling the on/off switch located behind the front cover (at the end of the programming session).
  • Page 41 MTS DDA (F8 - FF) EIA232 Printer modes PRINT ON TIME PRINT ON ALARM PRINT ON TIME & ALARM NOTE For EIA 232 printer modes, the Level Plus monitor requires an 80 column printer with a minimum buffer size of 1K (thousand) bytes.
  • Page 42 Modbus Communication Protocol Modes If you have a Level Plus Monitor with Modbus ASCII or Modbus RTU communications protocol, the following Modbus screens are shown. M O D B U S S L A V E A D D R = ( 1 - 2 4 7 ) ‘...
  • Page 43 Press the MODE or +/- key to select one of the available choices for each print field. PRODUCT INTERFACE TEMPERATURE GOVP GOVI NSVP MASS GOVT GOVU BLANK Printer reports can be scheduled in two ways. The user can select PRINT EVERY HOUR or print by customized PROGRAMMED TIMES.
  • Page 44 73456 PHI ILO The Level Plus communication system allows the user to enable or disable the communi- cation checksum function. If the checksum function is enabled, the system will calculate and append a two-byte checksum value to the end of each message transmitted. Press the MODE key to enable/disable the checksum function or ENTER to continue.
  • Page 45 Relay Polarity The relay output polarity can be software programmed for normally open (NO) or nor- mally closed (NC) operation. The relay contacts are internally wired as normally open when the relay coils are de-energized, allowing the user to program the system for “fail- safe”...

  • Page 46: Gauge And Tank Parameters

    DDA tank gauge to match the desired tank channel in the Level Plus monitor. The Level Plus monitor will always poll the DDA tank gauge at communication address C0 hex (192 deci- mal) for Tank # 1, C1 hex (193 decimal) for Tank #2, C2 hex for Tank #3, etc.
  • Page 47 Binary Value of Each Switch 32 16 Base Address = C0 HEX = 192 Decimal Address = C1 HEX = 193 Decimal Address = C2 HEX = 194 Decimal Address = C3 HEX = 195 Decimal Address = C4 HEX = 196 Decimal Address = C5 HEX = 197 Decimal Address = C6 HEX = 198 Decimal Address = C7 HEX = 199 Decimal...
  • Page 48 Alphanumeric Tank Label The alphanumeric tank label can be up to 7 characters long and comprised of any of the alphanumeric characters in the list shown in the next section. The default tank label is TANK#1: as shown below in the example screen (where x is the given tank #). Press the MODE key to change the current tank label.
  • Page 49 T A N K # 1 R E S O L U T I O N : 0 . 0 0 1 i n ‘ M o d e ’ T O C H A N G E ‘ E n t e r ’ T O C O N T I N U E NOTE: The selected level resolution will directly affect the tank gauge (sensor) scan rate.
  • Page 50 Level Offset (Product and Interface) The LEVEL OFFSET function allows the user to add or subtract a fixed value from the level measurement(s) received from the DDA tank gauge. This allows the displayed tank gauge level reading to be calibrated to the users hand gauged tank reading (or other level reference).
  • Page 51 The Level Plus monitor soft- ware limits any temperature changes to a maximum of 5 degrees (F) between updates. FAST TEMP mode will only work with DDA tank gauge software versions 1.04 and later.
  • Page 52 T K # 1 P R O D H i H i A L A R M E N A B L E D ( O N ) ‘ M o d e ’ T O C H A N G E ‘...
  • Page 53 T K # 1 P R O D H i H i H Y S T . 0 . 0 0 0 i n . ‘ M o d e ’ T O C H A N G E ‘ E n t e r ’ T O C O N T I N U E NOTE Very small or zero (0.000) hysteresis values may cause the relay outputs to become unstable when the...

  • Page 54: Side Tank Indicator Parameters

    STI module to match the desired tank channel in the Level Plus monitor. The Level Plus monitor will always poll the STI module at communication address 80 hex (128 decimal) for Tank #1, 81 hex (129 decimal) for TANK #2, 82 hex for Tank #3, etc.

  • Page 55: Analog Parameters

    Analog Parameters Use the number keys to select the analog output number to edit and press the ENTER key. The eight available analog output channels are referenced as analog output #1 to analog output #8. S E L E C T A N A L O G O U T P U T T O E D I T : ( 1 - 8 ) ‘...
  • Page 56 O U T P U T # 1 , T A N K # 1 A S S I G N E D T O P R O D U C T ‘ M o d e ’ T O C H A N G E ‘...

  • Page 57: Volumetric Parameters

    Volumetric Parameters NOTE The volume display units are controlled by the ‘vol- ume display units’ SYSTEM parameter (see section 12). Independent of this SYSTEM parameter setting, all volume programming parameters must be entered in English tank gauging units (inches, gallons and pounds or inches, barrels, and pounds).
  • Page 58 API Gravity NOTE To enter API gravity values, temperature correc- tion method 6A or 6B must have been selected above. If 6A or 6B was not selected proceed to “THERMAL EXPANSION COEFFICIENT” section of manual.. Enter the API gravity (normalized density) value for the product being measured by tank gauge #1.
  • Page 59 Reference Temperature (Only if 6C MOD is selected) Select the desired base temperature for the volume calculations. The allowable values are 32°F to 150°F. T A N K # 1 R E F . T E M P . 6 0 . 0 °F ‘...
  • Page 60 ‘ E n t e r ’ N E W V A L U E The Level Plus software includes a VCF TABLE copy function. This function can be used to duplicate VCF tables for other tank numbers. This function can only be accessed from...
  • Page 61 ‘ E n t e r ’ T O C O N T I N U E The Level Plus system will then prompt for the table number to copy ‘to’. Enter the tank/table number that you want to copy TO.
  • Page 62 T A B L E C O P Y C O M P L E T E D After 3 seconds, the Level Plus system will return back to the ‘VCF TABLE SIZE’ screen. The user can then continue programming other parameters or copy another VCF table.
  • Page 63 ‘ E n t e r ’ T O C O N T I N U E NOTE The Level Plus volumetric software does not calculate temperature corrected INTERFACE volume or INTER- FACE mass data. Since the mass stabilization calcula-...
  • Page 64 T A N K # 1 D E L T A M A S S L I M I T = 0 l b s . ‘ M o d e ’ T O C H A N G E ‘...
  • Page 65 The volumetric calculation system requires the user to input tank height versus tank vol- ume information. The Level Plus monitor currently supports GAUGE TABLES (strapping tables) or equations for SPHERE type vessels. Select the desired type of STRAP MODE by pressing the MODE key.
  • Page 66 NOTE If STRAP TABLE mode is selected, proceed to STRAP TABLE section of manual. The current SPHERE radius length is shown Press the MODE key to change the current value or press ENTER to continue. T A N K # 1 S P H E R E R A D . 7 0 0 i n .
  • Page 67 ‘ E n t e r ’ N E W V A L U E The Level Plus software includes a STRAP TABLE copy function. This function can be used to duplicate strap tables for other tank numbers. This function can only be accessed from the STRAP TABLE size screen.
  • Page 68 ‘ E n t e r ’ T O C O N T I N U E The Level Plus system will then prompt for the table number to copy ‘to’. Enter the tank/table number that you want to copy TO.
  • Page 69 T A B L E C O P Y C O M P L E T E D After 3 seconds, the Level Plus system will return back to the ‘STRAP TABLE SIZE’ screen. The user can then continue programming other parameters or copy another STRAP table.

  • Page 70: System Test Functions

    System Test Functions System test functions can be used to test selected hardware functions of the Level Plus monitor. Available test functions include: KEYPAD/LED/BEEP TEST LCD DISPLAY TEST RELAY OUTPUT TEST DDA COM PORT TEST HOST COM PORT TEST ANALOG OUTPUT TEST The first test function is used to test the keypad, the red alarm LED, the audible beeper and the associated control circuitry.
  • Page 71 The RELAY OUTPUT TEST is used to test the operation of the relays and the associated relay con- trol circuitry. CAUTION This relay test will toggle the relay outputs. The user must insure that any devices connected to the relay outputs will not be affected by the test and that any personnel could not be harmed due to any connected devices coming on or off at unexpected times.
  • Page 72 ‘ E n t e r ’ T O C O N T I N U E To transmit characters out of the Level Plus monitor DDA communication port, press the "1" key. To receive characters into the communication port and display them on the LCD, press the "2"...
  • Page 73 This test will display all characters received into the DDA communication port onto lines two and three of the LCD screen. If more than 40 characters are received, the characters will wrap around to the first character position on line two. Only LCD compatible ASCII characters can be dis- played.
  • Page 74 To transmit characters out of the Level Plus monitor host communication port, press the "1" key. To receive characters into the host communication port and display them on the LCD, press the "2" key. If the "1" key is pressed the TX CHARACTERS screen is displayed.
  • Page 75 NOTE External communication equipment (EIA485 or EIA232 compatible depending on Level Plus monitor host port configuration) will be required to input characters into the host communication port to verify the receive functionality. The baud rate/word length parameters for the host communication port are defined in the previous section.
  • Page 76 The LPM MEMORY TRANSFER function is used to upload or download the contents of the Level Plus Monitor’s non-volatile EEPROM memory in 2-kilobyte pages for archive purposes or to copy memory from one monitor to another. The user must have MTS DDASETUP software running on an IBM compatible PC to perform the memory transfer.
  • Page 77 If ‘HOST->LPM” is selected, the following screen is displayed, where PAGE X refers to the memory page (0-3) chosen above. L P M M E M O R Y T R A N S F E R H O S T - > L P M ( P A G E X ) W A I T I N G F O R H O S T ‘...

  • Page 78: Ending The Programming Sessions

    Ending The Programming Session This completes the cycle of parameter entries for the Level Plus monitor. If you are using more than one tank, be sure to repeat all necessary parameter assignments for each additional tank. If you wish to enter more parameters press the MODE key. If you have finished entering parame- ters press the ENTER key.

  • Page 79: Level Plus Host Communication Protocol

    Level Plus Host Communication Protocol This section describes the communication protocol required to access LEVEL PLUS Tank Monitoring System data from a remote EIA 232 or EIA 485 communication device. Hardware Considerations RS485 SYSTEM This system allows one host terminal (or computer) to communicate with up to 19 LEVEL PlUS monitors over a two wire balanced differential network.
  • Page 80 Command Structure The following command structure is used to issue commands to the Level Plus monitor. <SOH><addr><tank#><register#><EOT> Where: 1. <SOH> is an ASCII start of header code (01 Hex). 2. <addr> is the communication address decoded by each Level Plus monitor.
  • Page 81 During emulation mode, all dis- play information is sent to both the Level Plus LCD display and the externally connected terminal device. All programming menus are self prompting and the user only needs to respond with the requested information in each programming menu.
  • Page 82 NOTE For all data output formats: Each data record always begins with <STX> (01 Hex) as the first character transmitted. The second character is always the address char- acter of the responding monitor (Upper case ASCII A through S, or 41 through 53 Hex). The third character is always the tank number interrogated (ASCII 0 through 8, or 30 through 38 Hex).
  • Page 83 Register 11 general format (Product level, interface level and average temperature). <STX>atrr:dddddddddd:dddddddddd:dddddddddd<ETX>cc <STX> = ASCII start of text character (02 Hex) a = Level Plus communication address t = Tank number rr = Register number : = ASCII colon field delimiter (3A Hex) d = data (fixed at 3 data fields, 10 characters for each data field) <ETX>...
  • Page 84 = not defined (always ASCII "0") NOTE d1 is the first character after colon delimiter character. Register 13 output example from Level Plus monitor at communication address E, Tank 5, LVLLO and INTHI alarms active, all others inactive. <STX>E513:0010100000000000<ETX>...
  • Page 85 Register 20 and 21 general format (Mass stabilization enable and disable). <STX>atrr:d<ETX>cc <STX> = ASCII start of text character (02 Hex) a = Level Plus communication address t = tank number rr = register number : = ASCII colon field delimiter (3A Hex) d = data (fixed at 1 data field of 1 character) <ETX>...
  • Page 86 Register 32 general format (Read system volume units) <STX>attr:d<ETX>cc <STX> = ASCII start of text character (02 Hex) a = Level Plus communication address t = tank number rr = register number : = ASCII colon field delimiter (3A Hex)
  • Page 87 The user must insure that the proper range of API grav- ity is specified for the particular API table that is select- ed or the Level Plus Monitor will indicate the *VCF ERR error message for NSVP and MASS outputs.
  • Page 88 For all level register outputs (01, 02 and 11) the following error messages are possible. The description for these and other error messages can be found in section 8 of this man- ual. *NO COMM *COMM ERR *NO DATA *DATA ERR *CSUM ERR *UART ERR *PRGRM ERR...
  • Page 89 NOTES AND RESTRICTIONS 1. All communications are half duplex only. Only the host device or the Level Plus monitor can transmit characters at any one time. 2. In keyboard emulation mode the Level Plus monitor can only accept characters from the exter- nal terminal device at a rate of 10 characters per second.
  • Page 90 DDA LPM Modbus Implementation The MTS DDA LPM Modbus implementation conforms to the “Modicon Modbus Protocol Reference Guide, PI-MBUS-300 Rev. G” available from Modicon, Inc. The information provided below assumes familiarity with the Modbus protocol as outlined in this reference guide. All infor- mation provided applies to both Modbus RTU and Modbus ASCII protocol versions.
  • Page 91 Function 08 - Diagnostics (Subfunction 01, Restart Communications Option) If the LPM is in listen-only mode, the LPM responds to this message by switching out of listen-only mode (note that no response is sent to the request). If the LPM is not in lis- ten-only mode, it responds as follows: Slave address: echoed...

  • Page 92: Procedure For Calculating Volume Correction Factors (Vcf)

    0 and 300 degrees Fahrenheit and VCF values between 0.80000 and 1.20000. 5. Program the VCF versus temperature data into the Level Plus monitor. Enter the values into the table by increasing temperatures. For this example, the VCF table would start with 40°F and VCF = 1.03099, and end with 80°F and VCF = 0.96718...

  • Page 93: Typical Rs232 Printer Connections

    Appendix B Typical RS232 Printer Connections NOTE The Level Plus requires an 80 column printer with a minimum buffer size of 1K (thousand) bytes. CONFIGURATION #1: Printer with a “Busy Flag” Output W 2 @ 6 X W 2 @ 6 X .
  • Page 94 Tank Multiplex Assignment The Level Plus monitor polls each DDA tank gauge in a sequential order based on the tank numbers that are enabled on the tank multiplex assignment programming menu. Level data is sequentially polled from each active tank gauge in the scan loop.
  • Page 95 Level Averages (Tank parameter) The level averages programmable parameter determines how many times to poll (and then average) level data from the specified tank gauge. The specified number of level averages (polls) is completed before advancing to the next gauge in the multiplex assignment. The level average factor directly affects the overall polling rate by the specific gauge time delay times the level average factor (gauge poll rate = level time delay x level averages).
  • Page 96 Worst case delay time to acquire level data from all tank gauges in system (assumes one temperature poll from gauge with longest temperature delay time). 2.(T1L)x(A1) + (T2L)x(A2) + (TnL)x(An) + (TwT) Where: T1L = Tank gauge #1 level delay time (based on selected level resolution) T2L = Tank gauge #2 level delay time (based on selected level resolution) TnL = Tank gauge #n level delay time (based on selected level resolution) A1 = Number of level averages for tank gauge #1...
  • Page 97 (T1L)x(A1) + (T2L)x(A2) + (T3L)x(A3) + (T4L)x(A4) + (TwT) Substituting each variable with the respective values the equation becomes, (1.32)x(1) + (0.65)x(1) + (0.73)x(3) + (0.58)x(1) + (5.5) Worst case delay time to update level on all 4 gauges = 10.2 seconds.

  • Page 98: Eprom Replacement Procedure

    EPROM Replacement Procedure NEMA 1 Model 1. Disconnect AC power from the Level Plus monitor at the main fuse panel. 2. Remove the EPROM access cover located on the rear of the NEMA 1 enclosure (1 screw). 3. The EPROM's are the two labeled integrated circuits installed in the latching sockets. Remove one eprom at a time by releasing the latching mechanism on the socket.
  • Page 99 7. Remove the four mounting screws that secure the mounting plate to the rear of the NEMA 4X enclosure. See illustration D-2. 8. Lift the electronic assembly and mounting plate out of the enclosure and place on a clean working surface or bench.
  • Page 100 Figure D-2 NEMA 4X Mounting Screws and Cable Locations NEMA 7 Model: 1. Disconnect AC power from the Level Plus monitor at the main fuse panel. 2. The main electronics assembly must be removed from the NEMA 7 enclosure to gain access to the EPROM devices.
  • Page 101 NEMA 7 enclosure to realign the brackets. Retighten all screws. 14. Reconnect AC power and check for proper monitor operation. Enclosure AC Ground Cable Heater Cable LEVEL PLUS ¤ Connector TANK MONITORING SYSTEM Heater Cable Power...
  • Page 102 Electronic assembly shown from rear view MTS - 1 xxxxxx MTS - 0 xxxxxx Figure D-4. NEMA 7 EEPROM Orientation...
  • Page 103 7. Refer to manufacturer’s documentation for connector pin-out information. 8. Refer to MTS Level Plus DDA Tank Gauge Monitor Operation and Installation Manual (Section 5) for communica- tion wire termination to communication terminal block TB2. Monitor host communication port must be configured...
  • Page 104 Appendix F LPM Modbus Register Maps Map 1: Registers arranged by tank number Modbus Register Data Address Data Description 30001 0000 Tank 1, Level 1 High Word (x 1000) see notes 2, 3, 4 30002 0001 Tank 1, Level 1 Low Word (x 1000) 30003 0002 Tank 1, Level 2 High Word (x 1000) see note 5...
  • Page 105 Modbus Register Data Address Data Description 30064 0063 Tank 2, GOVP Low Word 30065 0064 Tank 2, GOVI High Word 30066 0065 Tank 2, GOVI Low Word 30067 0066 Tank 2, GOVT High Word 30068 0067 Tank 2, GOVT Low Word 30069 0068 Tank 2, GOVU High Word...
  • Page 106 Modbus Register Data Address Data Description 30155 0154 Tank 4, Average Temperature (x 100) 30156 0155 Tank 4, RTD 1 (x 100) 30157 0156 Tank 4, RTD 2 (x 100) 30158 0157 Tank 4, RTD 3 (x 100) 30159 0158 Tank 4, RTD 4 (x 100) 30160 0159...
  • Page 107 Modbus Register Data Address Data Description 30222 0221 Tank 5, NSVP Low Word 30223 0222 Tank 5, Mass High Word 30224 0223 Tank 5, Mass Low Word 30225 0224 Reserved 30226 0225 Reserved 30251 0250 Tank 6, Level 1 High Word (x 1000) 30252 0251 Tank 6, Level 1 Low Word (x 1000)
  • Page 108 Modbus Register Data Address Data Description 30313 0312 Tank 7, GOVP High Word 30314 0313 Tank 7, GOVP Low Word 30315 0314 Tank 7, GOVI High Word 30316 0315 Tank 7, GOVI Low Word 30317 0316 Tank 7, GOVT High Word 30318 0317 Tank 7, GOVT Low Word...
  • Page 109 Map 2: Registers arranged by data type Modbus Register Data Address Data Description 30401 0400 Tank 1, Level 1 High Word (x 1000) 30402 0401 Tank 1, Level 1 Low Word (x 1000) 30403 0402 Tank 2, Level 1 High Word (x 1000) 30404 0403 Tank 2, Level 1 Low Word (x 1000)
  • Page 110 Modbus Register Data Address Data Description 30552 0551 Tank 1, RTD 2 (x 100) 30553 0552 Tank 1, RTD 3 (x 100) 30554 0553 Tank 1, RTD 4 (x 100) 30555 0554 Tank 1, RTD 5 (x 100) 30556 0555 Tank 2, RTD 1 (x 100) 30557 0556...
  • Page 111 Modbus Register Data Address Data Description 30605 0604 Tank 5, Alarm Status 30606 0605 Tank 6, Alarm Status 30607 0606 Tank 7, Alarm Status 30608 0607 Tank 8, Alarm Status 30651 0650 Tank 1, GOVP High Word 30652 0651 Tank 1, GOVP Low Word 30653 0652 Tank 2, GOVP High Word...
  • Page 112 Modbus Register Data Address Data Description 30758 0757 Tank 4, GOVT Low Word 30759 0758 Tank 5, GOVT High Word 30760 0759 Tank 5, GOVT Low Word 30761 0760 Tank 6, GOVT High Word 30762 0761 Tank 6, GOVT Low Word 30763 0762 Tank 7, GOVT High Word...
  • Page 113 Modbus Register Data Address Data Description 30903 0902 Tank 2, Mass High Word 30904 0903 Tank 2, Mass Low Word 30905 0904 Tank 3, Mass High Word 30906 0905 Tank 3, Mass Low Word 30907 0906 Tank 4, Mass High Word 30908 0907 Tank 4, Mass Low Word...
  • Page 114 7. Individual RTD (Resistive Temperature Device) temperature [as polled by DDA tank gauge(s)] 8. Alarm status bit definitions: Alarm Type Description LVLHH LEVEL HIGH-HIGH LVLHI LEVEL HIGH LVLLO LEVEL LOW LVLLL LEVEL LOW-LOW INTHI INTERFACE HIGH TMPHI TEMPERATURE HIGH TMPLO TEMPERATURE LOW MASHI MASS HIGH...
  • Page 115 MODBUS is a registered trademark of MODICON Inc. HART is a registered trademark of the HART Foundation, Incorporated. Printed in USA © 2002 MTS Systems Corporation All Level Plus products are covered by US patent number 5,545,984. Additional patents are pending.

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