L-20:L-20 2/24/11 9:59 AM Page 1 Bulletin L-20 Series MPC Pump Controller Installation and Operating Manual MERCOID A Division of Dwyer Instruments, Inc. P.O. BOX 258 • MICHIGAN CITY, INDIANA 46361, U.S.A. Phone: 219/879-8000 • Fax: 219/872-9057 www.dwyer-inst.com • e-mail: lit@dwyer-inst.com FR # M1-443247-00 Rev.
L-20:L-20 2/24/11 9:59 AM Page 1 CONTENTS Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Model Identification . . . . . . . . . . . . . . . . . . . . .
L-20:L-20 ..1 ..2 ..3 ..3 ..4 . 5-7 . 8-9 ..9 . 10 . 11 1-12 2-13 . 13 . 13 . 14 . 15 5-16 7-23 0-22 4-25 6-28 8-31 4X) 2/24/11 9:59 AM Page 2 SPECIFICATIONS Inputs: 4 to 20 mA DC or 2.0 to 10.0 V DC selectable. Input Impedance: Current input: 10 ohms, Voltage input: 100K ohms. Output Ratings: Control Relays: SPDT, rated 10A @ 240 VAC res., 1/4 hp @120 VAC, 1/3 hp @ 240 VAC. Alarm Relays: SPST, 3A @ 240 VAC res., 1/10 hp @ 120 VAC. Control Type: on/off, reverse or direct acting.
L-20:L-20 2/24/11 9:59 AM Page 3 GETTING STARTED 1. Install the control as described on page 4. 2. Wire the control following the instructions on pages 5 through 7. Page 5 contains basic wiring for the control. If using the Series MPC’s transmitter power supply follow the additional directions on page 6. Wiring instructions for the 232 and 485 series communication options is included on page 7. 3.
L-20:L-20 basic tional ptions rior to paces be a es are 2/24/11 9:59 AM Page 4 INSTALLATION Mount the instrument in a location that will not be subject to excessive temperature, shock, or vibration (see Specifications for specific tolerances). All models are designed for mounting in an enclosed panel. Select the position desired for the instrument on the panel. Prepare the panel by cutting and deburring the required opening. From the front of the panel, slide the housing through the cut out.
L-20:L-20 2/24/11 9:59 AM Page 5 WIRING Do not run transmitter wiring or other class 2 wiring in the same conduit as power leads. Use only the probe or transmitter for which the control has been programmed. Maintain separation between wiring of sensor, auxiliary in or out, and other wiring. See the ˝Secure Menu˝ for input selection. WIRI Wire show Supply connections should be made in accordance with the National Electrical Code per Article 300, and local regulations.
L-20:L-20 s. Use intain ecure 2/24/11 9:59 AM Page 6 WIRING FOR TRANSMITTER INPUTS USING INTEGRAL POWER SUPPLY Wire power and outputs as shown on previous page. Wiring for two-wire transmitters shown below in Figure 3. All wiring shown in Figure 3 is Class 2.
L-20:L-20 2/24/11 9:59 AM Page 7 WIRING FOR 485 AND 232 SERIAL COMMUNICATION OPTIONS Wire power and outputs as shown on page 5. Wiring for options is shown in Figure 4 below. All wiring shown below is Class 2. Shielded twisted pair is recommended for Option 485. DO NOT run signal wiring in the same conduit or chase as the power wiring. Erratic operation or damage to the control circuitry will result.
L-20:L-20 2/24/11 10:00 AM Page 8 FRONT PANEL FUNCTIONS below. 85. iring. Key functions are as follows: INDEX: Pressing the INDEX key for 2 seconds will bring up the Secondary menu starting at the SP1H menu item. Holding the key for 5 seconds will bring up the Secure menu starting with the menu item SECr . Once in the menus, pressing the INDEX key advances the display to the next menu item. May also be used in conjunction with other keys as noted below.
L-20:L-20 2/24/11 10:00 AM Page 9 INDEX & DOWN ARROW: Pressing these keys simultaneously will allow backing up one menu item, or if at the first menu item they will cause the display to return to the primary menu. If an alarm condition has occurred, these keys may be used to reset the alarm. INDEX & ENTER: Pressing these keys simultaneously and holding them for 5 seconds allows recovery from the various error messages.
L-20:L-20 ause ed, eys. et at 2/24/11 10:00 AM Page 10 SECURITY LEVEL SELECTION Three levels of security are provided. The SECr menu item security level may be viewed or changed at any time regardless of the present security level in the Secure menu. The display shows the current security level. To change security levels change the password value using the UP ARROW or DOWN ARROW keys and pressing the ENTER key.
L-20:L-20 2/24/11 10:00 AM Page 11 LEAD/LAG OPERATION The Mercoid® MPC pump controller is designed to easily operate a pair of pumps in the most efficient manner possible. The controller has a 'lead/lag' feature that allows two pumps to operate in an alternating fashion to minimize wear. The Mercoid® MPC pump controller has a pair of set points each for pump 1 and pump 2. If the lead/lag feature is turned off, SP1H and SP1L control pump 1 and SP2H and SP2L control pump 2.
L-20:L-20 e p 2. If ontrol mp 1 ecure Set ow m 2/24/11 10:00 AM Page 12 In the Secure menu the value of PSF is programmed for the action of the MPC based on the condition of a seal failure. If set to ˝AUt0˝ when pump moisture sensor indicates that there is a seal failure condition then the corresponding pump seal failure lamp is lit on the controller. The pump will remain in service with only the lamp indication of failure.
L-20:L-20 2/24/11 10:00 AM Page 13 ANALOG RETRANSMISSION OPERATION The analog retransmission allows the Process Variable to be sent as an analog signal to an external device. The signal may be either 2 to 10 VDC (option RV) or 4 to 20 mADC (standard). The output may be changed in the field from one to the other by the toggle switch located on the top printed circuit board, factory standard is mADC. Wire the output as shown on page 5.
L-20:L-20 l to DC e ignal e mA). nal e me he he menu hold r by 2/24/11 10:00 AM Page 14 OPTION 232, 485 SERIAL COMMUNICATION OPERATION The serial communications options allow the control to be written to and read from a remote computer or other similar digital device. Communication is allowed either through a RS-485 (Option 485) port, or a RS-232 (Option 232) port. Wire the communication lines as shown on Page 7.
L-20:L-20 2/24/11 10:00 AM Page 15 MENU SELECTIONS Notation Conventions for the Menus Because of the number of features available in this control, information is included that may not apply to your specific control. All usable features are included in this book, but may not be used in your process. To increase clarity the following conventions are used: P1rn 1. Certain features or functions shown in this book are contextual.
L-20:L-20 at ut ed: enu his ms. If s its ate of alue 2/24/11 10:00 AM Page 16 P1rn Pump 1 Run Time: Total ON Time for Pump 1 in HOURS since last reset (0000 - 9999 hours). P2rn Pump 2 Run Time: Total ON Time for Pump 2 in HOURS since last reset (0000 - 9999 hours). P1SF Pump 1 Reset for Seal Failure. Displays ˝----˝ when pump 1 is in normal operating condition based on seal failure input. Displays FA1L if pump 1 has met the condition of a seal failure. Press the ENTER key to reset.
L-20:L-20 2/24/11 10:00 AM Page 17 Secure Menu Press the INDEX key for 5 Seconds to start the menu. Press INDEX to advance to the next menu item. Press UP ARROW or DOWN ARROW to change the value in the display. Press ENTER to retain the value. OUTPUTS ARE DISABLED (TURNED OFF) WHILE CONTROL IS IN THE SECURE MENU. SECr Security Code: See the Security Level Selection and the Password Table on page 10, in order to enter the correct password. Factory Default is 4 .
L-20:L-20 9 to 10:00 AM Page 18 0SUP Zero Suppression: Select 0n or 0FF. Factory default is 0n. 0FF The input range will start at 0 (zero) Input. 0n The input range will start at 4.00 mA or 2.00 V. 1nP Input Type: Select one of the following. Refer to the Input wiring section for the proper wiring. Factory Default is Curr. Curr DC Current Input 0.0 to 20.0 or 4.0 to 20.0 mA. UoLt DC Voltage Input 0.0 to 10.0 or 2.0 to 10.0 volts. ---Reserved P0t Pump Over Temperature: Select AUt0 or rES.
L-20:L-20 2/24/11 10:00 AM Page 19 PrSt Pump Run Time Reset: Select 0n or 0FF. Selecting 0n will allow Pump Run Time to be reset in the Secondary menu while an 0FF selection will not allow Pump Run Time to be reset. SPH Set Point High: Select from the highest input range value to SPL value. This will set the maximum SP1H or SP2H value that can be entered. The value for SP1H or SP2H will stop moving when this value is reached. Factory Default is 23.1.
L-20:L-20 2/24/11 10:00 AM Page 20 ALARM TYPE AND ACTION Caution: In any critical application where failure could cause expensive product loss or endanger personal safety, a redundant limit controller is required. When setting an alarm value for an absolute alarm (A1t = simply set the value at which the alarm is to occur. set set When setting the alarm value for a deviation alarm (A1t = difference in value from the Set Point (SP1H) desired.
L-20:L-20 2/24/11 Hi HiLo SF 0t SF0t 10:00 AM Page 21 High Alarm Only. A1Hi appears in the Secondary Menu. High and Low Alarms. Both A1Lo and A1Hi appear in the Secondary Menu, and share the same Alarm 1 Relay output. Seal Failure ONLY will trigger Alarm. Over Temperature Failure ONLY will trigger Alarm Both Seal Failure and Over Temperature Failure will trigger Alarm.
L-20:L-20 AL2 y ms and 2/24/11 10:00 AM Page 22 Alarm 2 function: Select 0FF, Lo, Hi, HiLo, SF, 0t, or SF0t. Factory default is Lo. 0FF Alarm 2 is disabled. No Alarm 2 menu items appear in the Secondary or Secure menus. Lo Low Alarm Only. A2Lo appears in the Secondary Menu. Hi High Alarm Only. A2Hi appears in the Secondary Menu. HiLo High and Low Alarms. Both A2Lo and A2Hi appear in the Secondary Menu, and share the same Alarm 2 Relay output. SF Seal Failure ONLY will trigger Alarm.
L-20:L-20 FiLt P0H P0L 2/24/11 10:00 AM Page 23 Digital Filter: Select 0FF or1 to 99. In some cases the time constant of the sensor, or noise could cause the display to jump enough to be unreadable. If this value is set too high, controllability will suffer. Factory default is 3. (Analog Retransmission Output, see page 13) Process Output High: Select from any value greater than P0L to 9999 counts. Factory default is 23.1.
L-20:L-20 2/24/11 10:00 AM Page 24 DIAGNOSTIC ERROR MESSAGES f this .1. Display No display lighted FA1L tESt e e not CHEC LorE ess Meaning Display is blank. Instrument is not getting power, or the supply voltage is too low. Fail test appears upon power up if the internal diagnostics detect a failure. This message may occur during operation if a failure is detected. Displays flash.
L-20:L-20 2/24/11 10:00 AM Page 25 DIAGNOSTIC ERROR MESSAGES Display UFL or 0FL CHEC CAL ArEA (Alternates with PV) ArEA Meaning Underflow or Overflow: Process value has exceeded input range ends. Check calibration appears as an alternating message if the instrument calibration nears tolerance edges. Check calibration appears as a flashing message if the instrument calibration exceeds specification. This message appears if the ambient temperature of the control approaches the ends of tolerance.
L-20:L-20 2/24/11 10:00 AM Page 26 PROGRAMMING CHART Use the charts on this and the next page to record the values in your application. You may want to photocopy the pages if you plan to make programming changes. Menu Primary Menu Secondary Menu Secure Item PV SP1H Default XXXX Set At Description Home Position, Process Variable & SP1H's Value displayed Item SP1H SP1L SP2H SP2L A1Hi A2Lo SFS1 SFS2 P1rn Default 23.1 0.0 23.1 0.0 23.1 2.
L-20:L-20 Menu 2/24/11 10:00 AM Item PSF Default AUtO TESt PrSt SPH SPL S1PI On On 23.1 0.
L-20:L-20 Menu 2/24/11 10:00 AM Item POL LorE Default 0.
L-20:L-20 2/24/11 10:00 AM Page 29 PROGRAMMING EXAMPLE EXAM Example: • Keep Empty, two pump (duplex) • Depth 25 feet • Pump 1: Start at 6 feet Stop at 3 feet Pump 2: Start at 12 feet Stop at 9 feet • Low level alarm: 1 foot, fixed, auto reset • High level alarm: 20 feet, fixed, auto reset • Want Lead/Lag function on • Automatic reset of pump over temperature and seal failure • No communication options • Want 4-20 mA retransmission • Using with a 4-20 mA input.
L-20:L-20 2/24/11 10:00 AM Page 30 EXAMPLE PROGRAMMING CHART continued Menu on al s ut.
L-20:L-20 2/24/11 10:00 AM Page 31 EXAMPLE PROGRAMMING CHART continued Menu Item AL1 A1t Default Hi A1rE OnOf A1 A1iH A1St OFF CLOS Set At Alarm 1 Reset (selectable onof (auto) or hold (manual)) Pi A1LP O on Secure A1td OFF AL2 A2t Lo AbS A2rE OnOf OFF Filt POH POL 3 23.1 0.
