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Mecc Alte SMARTECH DC250 Technical Manual

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DC250
CONTROLLER
TECHNICAL MANUAL

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Summary of Contents for Mecc Alte SMARTECH DC250

  • Page 1 DC250 CONTROLLER TECHNICAL MANUAL...
  • Page 2 DC250 Technical Manual This Page Intentionally Left Blank ENGLISH Code: EAAM075403EN Rev. 04 | Date: 14/04/2023 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 3 10/10/2022 Valid for DC250 version 1.05. 5.4.5, 5.5.5, 5.6.4, 5.6.5, 6.4.3, 6.4.7.11…6.4.7.17, 7.4.1, 7.4.2.1…7.4.2.3 14/04/2023 Valid for DC250 version 1.06. 5.6.4, 6.4.1, 6.4.6.7, 7.3.3, 7.3.7.1, 7.3.10, 7.3.10.1, 7.3.10.2. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 4: Table Of Contents

    5.6.3 Digital input used as analogue (T.16) ............40 5.6.4 Configuration and functions of the analogue inputs ........40 5.6.5 Conversion curves ..................42 Communication ports ..................43 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 5 Loads management ..................108 7.6.1 AUTO-START application ................108 7.6.2 DRIVE application ..................109 7.6.3 LIGHTING TOWER application ..............109 7.6.4 Command logic ..................110 7.6.5 Events e signalling ..................112 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 6 59 – High generator voltage pre-alarm (59>>) ............133 62 –CAN BUS connection failure ................133 64 – Fuel pump failure ................... 134 65 – Low coolant temperature pre-alarm (from measure)........134 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 7 Power thresholds ....................143 9.4.1 Low power ....................143 9.4.2 High power ....................144 Counters ......................144 9.5.1 Reset the counters ..................144 Clock/calendar ....................145 Plant name ....................... 145 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 8: Introduction

    Mecc Alte makes a considerable effort to continuously improve and update its products; they are therefore subject to both hardware and software changes without notice. Functions described in this manual may therefore differ from those in your device.

  • Page 9: Definitions

    Although most configurable parameters are accessible from the front panel, some particular features or configurations, due to their nature, can only be set or edited through the Mecc Alte Board Programmer4 PC Software (hereinafter called “BoardPrg4”), which can be downloaded for free from the Mecc Alte website www.meccalte.com...

  • Page 10: Maintenance And Cleaning

    To find out where and how to deliver these products to the place closest to you, contact the appropriate municipal office. Appropriate recycling and disposal help to conserve nature and prevent harmful effects on health and the environment. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 11: Views Of Dc250

    DC250 Technical Manual Controller ENGLISH Code: EAAM075403EN DC250 Rev. 04 | Date: 14/04/2023 2 Views of DC250 DC250 front view. DG250 rear view Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 12: Technical Features

    CAN BUS communication in progress. Maximum absorption: • 256 mA @ 7.0 Vdc. • 130 mA @ 13.7 Vdc. • 70 mA @ 24.0 Vdc. Overvoltage Category OVCII Pollution degree Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 13 < 0.2% of full scale (excluding the shunt error). The DC current measurement accuracy depends on the accuracy class of the shunt used. We recommend using shunts with an accuracy class of 0.5 or better. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 14 Alternatively, the input can work as a generic voltage analogue input, or as an additional digital input with activation at + VBATT. Frequency range. 1…10000 Hz. Sampling frequency. 10 kHz. Resolution. 0.1 Vdc. Accuracy. < 0.5% of the full scale. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 15 Voltage analogue input. Alternatively configurable as a digital input. Measurement range. 0…10 Vdc (rispetto a GND). Sensor disconnected signalling. Sampling frequency. 10 kHz. Resolution. 0.1 Vdc. Accuracy. < 0.5% of the full scale. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 16 Maximum 5µA @ 32 Vdc. deactivated. Protections. Integrated thermal, short circuit, overvoltage, and reverse polarity protections. Always use external opening overvoltage damping diodes especially in case of inductive loads. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 17 150 µs the progressive intervention of the thermal protection begins until the output switches off. Always use external opening overvoltage damping diodes especially in case of inductive loads Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 18 Resolution. 128 x 64 pixels. Pixel size. 0.48 x 0.48 mm. Visual area size. 65 x 33 mm. Contrast. Self-adjusting with temperature, with the possibility of manual corrections. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 19 Cut-out dimensions. 118 x 92 mm. 200 g. Weight. 260 g with connectors and fixings. Protection degree. IP65 external with gasket for the front panel. IP20 for inside panel. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 20: Installation

    It must also comply with the limit value of the overcurrent protection used. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 21: Connections And Configuration

    Output for the excitation of the engine alternator battery charger. Battery charge DC voltage measurement input. Alternatively, you can use it as an analogue input for DC voltage, or as a digital input. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 22 The measurement is differential (not referred to GND): see T.42 DC voltage (-). paragraph 3 for maximum excursions with respect to GND. Connector Terminal Function Description connection FUNCTION mode, DC250 USB B configuration. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 23: Power Supply (T.01

    (D+ signal). WARNING! during installation, connect the battery positives as a last step, after having opened all the fuses available in the panel Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 24: Engine Connections

    T.04 Command for the fuel solenoid (de-energizing stop) Configurable static output, preassigned to control the fuel shut-off solenoid valve (FUEL), with de-energizing stop systems. It outputs the voltage present on terminal T.02 (+ BATT). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 25 “normally open” contact connected between T.02 (+ BATT) and T.05 (STOP) without intermediate fuses (pressing the emergency button supplies positive voltage to the stop command bypassing the DC250 command) Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 26: Excitation/Operation Check Of The Charge Alternator D+ (T.09)

    You can disable the AL.005 shutdown by setting the delay P.0349 to zero. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 27: Measurement Of Engine Rotation Speed

    Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 28 DC250 shows the real speed. See the graph below for the minimum characteristics of the input signal as a function of frequency. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 29: Resistive Analogue Sensors (T.12

    The DC250 CAN BUS interface is not galvanically isolated. Connect terminal T.20 to the CAN_H terminal of the ECU. Connect the terminal T.21 to the CAN_L terminal of the ECU. Connect the cable shield to signal ground on one side only. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 30: Generator Connections

    Parameter P.9502 allows to set the nominal DC current of the generator (all the protection thresholds on the DC current can be set as a percentage of P.9502). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 31: Digital Inputs

    If you use the same command signal shared between multiple devices in addition to DC250, we recommend using diodes in series with the inputs as shown in the following figure: DC250 OTHER DEVICE T.1x Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 32: Resistive Analogue Inputs Used As Digital (T.13

    DIF.0000 - “Not used”. It is also possible to invert the logic state (always individually for each input), by operating directly on the DC250 using the parameters: Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 33 See 7.3.9.2.2 3311-Level for starting AdBlue pump See 7.4.2.3 3312-Level for stopping AdBlue pump See 7.4.2.3 4001-Generic pre-alarm See 8.5 4003-Generic deactivation See 8.5 4004-Generic shutdown See 8.5 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 34: Digital Outputs

    T.08 DOF.2034 – “Stable closing command for GCB” T.27 DOF.0000 – “Not used” T.28 DOF.0000 – “Not used” T.29 DOF.0000 – “Not used” T.30 DOF.0000 – “Not used” Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 35: T.03

    DC250 provides one parameter for each output, configuring its function (P.3001 for output T.03, the subsequent parameters for the other outputs). See the document [1] for the parameters list. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 36: And/Or Logics

    DC250, which stores their result into a digital output or into a virtual digital input. To use AND/OR logics with a digital output, use the DOF.0103 function. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 37 Not recognized deactivations ST.015 Not recognized shutdowns ST.024 Generator present (voltages/frequency) ST.025 Generator absent or out of thresholds ST.026 Delay for generator in thresholds ST.027 Generator in thresholds Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 38 Status #09 from engine management by file ST.329 Status #10 from engine management by file ST.330 Status #11 from engine management by file ST.331 Status #12 from engine management by file Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 39: Analogue Inputs

    ATTENTION! in any case we recommend respecting the functions provided for each single resistive input (to respect the names already provided in BOARDPRG4 and the reference diagrams) • T.13: FL - fuel level. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 40: D+ Input Used As Analogue Input (T.09)

    A parameter that configures a delay to manage the “out of range” condition (P.4012 and P.4015 for input T.13). A parameter that configures the options and actions for the “out of range” condition (P.4013 and P.4016 for input T.13). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 41 Bit 14: the anomaly also involves stopping the fuel pump. You can set any combination of these bits. The following table shows the list of functions that can be associated with the analogue inputs: Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 42: Conversion Curves

    PC with the BOARDPRG4 software. Once created, you can save the curve into a file for later re-use on other devices as well Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 43: Communication Ports

    DC250 from commands received through the communications ports. To send commands via Modbus to the DC250, you must precede each command with the password contained in P.0004. It is also possible to disable the Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 44: Usb Port

    ATTENTION! When powered through USB port only, DC250 is not operational, and you cannot use it to control the generator. Before connecting to the PC, you must first install the CDC_Sices_Win.inf driver supplied by Mecc Alte: • Windows 10 or later: driver already installed; you do not need to do anything else.
  • Page 45 0 – LSWF: the lowest index register contains the least significant part of the 32-bits value (standard). 1 – MSWF: the lowest index register contains the most significant part of the 32-bits value. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 46: Commands And Indications

    When DC250 activates an anomaly, you can “recognize” it by pressing any button: in this case DC250 “consumes” the button, thus it does not perform its real function until you press it again. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 47 P.495), DC250 also commands the start of the engine, otherwise you need to press the button again. In MAN mode, DC250 uses the button to start the engine (if stopped) (see 7.3.3). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 48 The state of the buttons is available for the AND/OR logics through the following internal states: • ST.304 - “START button”. • ST.305 - “STOP button”. • ST.308 - “AUTO button”. • ST.310 - “▲ button”. • ST.311 - “▼ button”. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 49: Signalling Lamps

    It indicates that at least one pre-alarm is active.  There are no anomalies.  Engine running. Engine running, but the generator voltage (or the engine speed) is out  of tolerance.  Engine stopped. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 50: Multifunction Display

    It is possible to use parameters P.2992 and P.2994 to hide some pages relating to categories “S” and “G”. These parameters can be set in bits, where each bit corresponds to a display page. For example, setting P.2992 to “00000001” (bit 0 active) hides page G.01. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 51: Structure Of The Display Area

    ATTENTION! the “@” symbol may also appear on the right to indicate that DC250 is modifying the non-volatile memory: do not disconnect the DC250 power supply when this symbol is visible, otherwise you risk losing the contents of the memory itself. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 52: Status Information (S.xx)

    On the bottom left, the status of the loads: AUTO-START application: ▪ : GCB circuit breaker closed. ▪ : GCB circuit breaker open. ▪ : GCB circuit breaker closing. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 53 (and at the same time force the exit from the BUS-OFF state) you need to: Keep the ▼ button pressed: DC250 highlights the counters. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 54 3. The "current value" of the controlled quantity (for example the real voltage supplied by the generator). 4. The correction command (percentage): DC250 converts it into a speed request (rpm) with parameters P.0713 and P.0714, then sends it to the engine ECU. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 55 The wording "DB" if the instantaneous error on the controlled quantity is lower than the dead band ("suspended" control loop). C250 hides this page if the operator disables the voltage control loop (P.9673 and P.9674 both at zero). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 56: Generator And Engine Measurements (G.xx)

    The discrepancy between the actual state of the circuit breaker and the relative command (in this case the two contact points of the circuit breaker flash). DC250 uses the “full” symbol with loads powered by the generator. • DRIVE: The clutch symbol (engaged/disengaged). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 57 If one or more of the above information is not available, DC250 replaces them by dashes or hides them. If there are multiple diagnostic codes active at the same time, DC250 cyclically alternates them on the display every two seconds. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 58 CAN BUS connection, it displays them on other pages. DC250 automatically hides this page if none of the following measures are available: • Rotation speed from magnetic pick-up sensor (terminals T.24…T.25). • Rotation speed from W sensor (terminal T.26). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 59 • Activation requests for the pump, depending on the fuel level: Start required. Stop required. In hysteresis. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 60 This page also shows all the diagnostic codes activated by the ECU, even if the DC250 is in OFF / RESET. Note: DC250 forces the visualization of this page every time the ECU activates a lamp. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 61 108: Barometric Pressure. • spn 109: Engine Coolant Pressure. • spn 110: Engine Coolant Temperature. • spn 111: Engine Coolant Level. • spn 132: Engine Intake Air Mass Flow Rate Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 62 1108: Engine Protection System Timer Override • spn 1127: Engine Turbocharger 1 Boost Pressure • spn 1135: Engine Oil Temperature 2. • spn 1136: Engine ECU Temperature. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 63 Attention: if you configured a password in parameter P.0001 (“user” protection level), you will not be able to reset the counters until you enter this password (login) in parameter P.0000 (“Access code”). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 64 Spn 4765 (“aftertreatment 1 diesel oxidation catalyst intake temperature”). • Spn 4766 (“aftertreatment 1 diesel oxidation catalyst outlet temperature”). • Spn 4781 (“aftertreatment 1 diesel particulate filter soot mass”). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 65 DC250 hides this page if the operator did not configure any digital output with the DOF.1037 function (“AdBlue pump”). It shows the following information: • The pump command mode: : MAN-OFF. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 66 The operator has the possibility to acquire measurements that are not necessary for the DC250, and to view them on the display. DC250 shows one measure per row: it shows the text configured for the analogue input (P.4010 for the T.13 input), followed by the measure. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 67: Historical Archives (H.xx)

    DC250 also records the measures described for the measurements’ archives. Parameter P.0441 (“Events to log”) allows you to enable the recording of groups of events. It is a bit-settable parameter: Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 68 Remote start command for low starting battery voltage. EVT.1070 Fuel pump on. EVT.1071 Fuel pump off. EVT.1072 AdBlue pump on. EVT.1073 AdBlue pump off. EVT.1074 Reset. EVT.1075 Clock/calendar not valid (but used). EVT.1076 Clock/calendar updated. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 69 ▼ buttons, DC250 shows cyclically all the pages of the selected event. To be able to select another event, press and hold the ▲ button for one second. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 70 DTC and SPN fields, and of the description of the anomaly. This archive has a capacity of sixteen records. At each subsequent recording, DC250 overwrites the oldest one. DC250 uses just one pages for each diagnostic code. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 71: Parameters' Programming

    This paragraph describes the general structure of the programming function and the operating procedure that allows you to view and/or modify the parameters by acting directly from the DC250 keyboard. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 72 • 4 (AUXILIARY FUNCTIONS): this menu contains other menus that configure the auxiliary functions of the engine, the setting of the historical archive, and more. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 73 To confirm the new value, press the AUTO button; to abort the modification and return to the original value, just hold down the STOP button for at least one second. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 74 This is true for the single parameter; however, it is possible to set two or more parameters in an inconsistent or even incompatible way. It is the operator's responsibility to verify that this does not happen. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 75 DC250 considers any operator a “manufacturer”, without having to set anything in P.0000. So, anyone can modify all the parameters, except the critical ones (this is the default situation of DC250). • Example 2: P.0001 = 0 P.0002 = 0 P.0003 = UUU Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 76 The value of a parameter is always readable, but the modification is possible only if P.0000 contains a suitable password. Parameters P.0001, P.0002 and P.0003 are exceptions: in fact, DC250 does not display them if P.0000 does not contain an adequate password. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 77: Operating Sequence

    DC250 can signal the application in use through its digital outputs, using the AND/OR logic with the following internal states: • ST.336: AUTO-START. • ST.346: DRIVE. • ST.347: LIGHTING TOWER. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 78: Principle Connection Diagram For Auto-Start Application

    DC250 Technical Manual Controller ENGLISH Code: EAAM075403EN DC250 Rev. 04 | Date: 14/04/2023 7.1.1 Principle connection diagram for AUTO-START application Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 79: Principle Connection Diagram For Drive Application

    DC250 Technical Manual Controller ENGLISH Code: EAAM075403EN DC250 Rev. 04 | Date: 14/04/2023 7.1.2 Principle connection diagram for DRIVE application Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 80: Principle Connection Diagram For Lighting Tower Application

    DC250 Technical Manual Controller ENGLISH Code: EAAM075403EN DC250 Rev. 04 | Date: 14/04/2023 7.1.3 Principle connection diagram for LIGHTING TOWER application Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 81: Operating Mode

    By sending Modbus commands through the communication ports. DC250 manages the commands only if none of the inputs described above are active (see paragraph 5.7). To send the command to change the mode it is necessary to write in sequence (within five seconds): Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 82: Events E Signalling

    DOF.3011 - “Not in OFF/RESET”. DC250 activates this output in MAN or AUTO mode. The DC250 operating mode is available for the AND/OR logics by the following internal statuses: • ST.000 - “OFF/RESET”. • ST.001 - “Manual”. • ST.002 - “Automatic”. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 83: Engine

    DIF.4221 (“Low oil pressure shutdown”). • DIF.4222 (“Low oil pressure pre-alarm”). DC250 also uses the two previous contacts both for the engine protections and for the disconnection of the starter motor. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 84 As an alternative (or in addition) to the temperature measurement, DC250 can manage digital inputs configured with the functions: • DIF.4231 (“High coolant temperature pre-alarm”). • DIF.4232 (“High coolant temperature shutdown”). DC250 also uses the previous two contacts for engine protections. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 85: Detecting The Starting/Stopped State And Disconnecting The Starter Motor

    If the command for the starter motor is not active, DC250 prevents its activation (because the engine is rotating). • Running: DC250 deactivates the starter motor and prevents its reactivation. DC250 detects the state of the engine by evaluating the following conditions: Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 86 Not stopped, if at least one of the previous conditions indicates "in motion" or running. • Running, if at least one of the preceding conditions indicates “running” consecutively for at least 0.2 seconds Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 87: Starting Requests

    If explicitly requested through the weekly schedule. You can configure this function with the following parameters: ▪ P.0426 (“Planned days”). ▪ P.0427 (“Planned start time”). ▪ P.0428 “Planned stop time”). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 88: Stop Requests

    “shutdown”, DC250 stops the engine without executing the cooling cycle. The operator can send the command in the following ways By pressing the STOP button on the DC250 front panel. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 89: Idle Speed Requests

    DC250 makes the internal engine commands available for AND/OR logics through the following internal states: • ST.128: glow-plugs preheat command (PREHEAT). • ST.130: fuel solenoid (FUEL). • ST.132: crank motor (START). • ST.133: stop solenoid (STOP). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 90: Engine Command Sequence

    If DC250 is in MAN mode and the operator releases the START button before the engine starts, DC250 waits for a fixed time of 10 seconds to see if the engine starts late: during this time, the FUEL command remains active (to allow the start). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 91 With standard procedure. It only applies in AUTO mode if DC250 does no longer require the engine start-up. DC250 has activated a “deactivation” type anomaly (an anomaly typically dangerous for the loads but not for the engine) Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 92: Events And Signalling

    STOP command: if the engine does not stop, DC250 activates the anomaly AL.021 ("Failed to stop"). 7.3.8 Events and signalling DC250 records an event for each variation of the engine state (if enabled through bit three of parameter P.0441): Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 93: Auxiliary Functions

    DC250 can automatically notify the operator of the need to execute the periodic engine maintenance. This report is based on the count of the real working hours of the engine, since the last maintenance. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 94 The display shows the status of the pump by the following symbols: • : pump switched on. • : pump switched off. DC250 can work both with a contact level detection system and with an analogue measurement. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 95 If the level is higher than the pump stop threshold, it assigns the stop status. • If there is a maximum level threshold, and the level is higher than the threshold, it assigns the maximum status. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 96 If you want to take advantage of all the peculiar characteristics of each specific ECU, it is necessary to operate in this way (but you need the BOARDPRG4 program): Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 97 On BOARDPRG4, using parameter F.0700, selects the file for the desired ECU. If it is not in the list, please update both BOARDPRG4 and DC250 to the latest software version available. If still not available, contact Mecc Alte. ATTENTION! DC250 shows parameter F.0700 as P.0716 and does not allow the operator to change it.

  • Page 98: Speed Regulation

    Analog speed regulator. DC250 does not have an analogue output on board; however, it is possible to connect a DIPOT module (produced by Mecc Alte) on the CAN BUS interface of DC250, which accepts the standard speed command defined by SAE J1939 from the CAN BUS line and translates it into an analogue command for the speed regulator.
  • Page 99 Set two or more points to convert the electrical measurement (volts DC) into a pressure measurement. • Use P.9860 to select the analogue input used (in this case “9 – Analog input T09”). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 100 Activate bit 0 of P.9864 if it is necessary to decrease the rotation speed to increase the pressure, otherwise leave it "inactive". • Adjust control loop gains (P.9673 and P.9674). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 101: Tier4 / Stage V

    Forcing the regeneration. It is the opposite command: by checking the regeneration request from the ECU on the icons on page G.10, the operator can force it in the moments most favourable to him. DC250 implements these commands in two ways: Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 102 DIF.2073 function, then regeneration is allowed when this input is active. Consequently, when DC250 “allows” the ECU to perform the "active" regeneration (SPN3700 = 1), it also disables the maximum speed protections. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 103 To use this feature, DC250 requires that: • The contact level transducer must exist. • The start and stop contacts must exist, and the operator must connect them to two digital inputs of DC250. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 104 Furthermore, DC250 records the activations and deactivations of the pump in the historical archive of the events, if bit seven of parameter P.0441 is active: • EVT.1072: fuel pump activated. • EVT.1073: fuel pump deactivated. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 105: Generator

    (P.0358 and P.0353). This means that the speed is out of tolerance if it is outside the thresholds P.0358 and P.0333, it is within tolerance if it is within the thresholds P.0358+hysteresis and P.0333-hysteresis, otherwise it keeps the previous state. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 106: Checking The Dc Voltage

    Band A: Absent Band B: Hysteresis Band C: Low 36.0 Band D: Hysteresis 37.2 (36.0+1.2) Band E: In tolerance 63.6 (64.8-1.2) Band F: Hysteresis 64.8 Band G: High Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 107: Generator Status

    ST.025 – “Generator out of tolerance or absent”. • ST.026 – “Delay for generator in tolerance”. • ST.027 – “Generator in tolerance”. • ST.028 – “Delay for generator out of tolerance or absent”. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 108: Loads Management

    Parameter P.0220 ("Minimum delay between the opening/closing commands (and vice versa) of the circuit breakers") prevents inversions of the circuit breaker command if a minimum time has not passed since the last command. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 109: Drive Application

    Parameter P.9772 (“Delay between turning on the lights”) allows you to set this delay. DC250 always respects this delay when switching on the groups of lights. Normally it respects it even during shutdown; exceptions are: Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 110: Command Logic

    DC250 in OFF/RESET mode. • Presence of shutdowns or deactivations. • Stop requests for the engine. • Engine stopped or stopping. • The idle speed cycle is in progress (ore required). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 111 “33” to connect the loads to the engine/generator. ▪ LIGHTING TOWER application • “101” to switch on all groups of lights. • “101” to switch off all groups of lights. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 112: Events E Signalling

    DC250 makes the same commands and states available for AND/OR logics through the following internal states: • ST.064 – “GCB status”. • ST.068 – “GCB closure command (stable)”. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 113 ST.087: power supply inhibition of power supply for starting due to low battery voltage. • ST.088: power supply inhibition for digital input. • ST.090: power supply inhibition for command from communication port. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 114: Anomalies

    Reset the anomaly: it means telling DC250 that the operator fixed the problem. 8.1 Silencing the acoustic signal The operator can silence the buzzer in two ways: • By pressing any button on the DC250 panel. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 115: Acknowledging The Anomaly

    8.4 Events e signalling related to anomalies DC250 records all anomalies (with their own code) in the events historical archive. DC250 provides functions for configuring the digital outputs, related to anomalies: Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 116 105: Charge alternator failure pre-alarm from CAN BUS. 132: High coolant temperature pre-alarm from CAN BUS. 134: High coolant temperature shutdown from CAN BUS. 135: Low coolant level shutdown from CAN BUS. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 117: Anomalies Related To Digital Inputs

    The following paragraphs will describe the specific anomalies: the description will always refer to the digital input T.16 related parameters (P.2001 and P.2002). In document [1] there is a table showing the parameters related to all the other digital inputs. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 118: Anomalies Related To Analogue Inputs

    (P.4005 or P.4008). DC250 manages the parameter that configures the actions in bits (each bit enables/disables a function related to the threshold). For a description of these parameters, see 5.6.4. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 119: List Of Anomalies

    P.0202 Hysteresis for generator’s measures. P.0303 Shutdown level for high voltage (59>>). P.0304 Delay for high voltage shutdown (59>>). To disable: P.0304 = 0. Enabled in: MAN, AUTO. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 120: Charge Alternator Failure

    The operator should define a maximum current value and a maximum time that the generator can withstand for this current. If the current is lower than the established threshold, the protection never trips. If it is higher than the Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 121: Manual Stop Command In Auto Mode

    DC250 enables this protection only after opening the fuel solenoid and disables it during the engine start and stop phases. Parameter P.0323 configures the type of the anomaly. 07 – Manual stop command in AUTO mode Icon: Type: Shutdown. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 122: Operating Conditions Not Reached

    DC250 activates it if the circuit breaker does not close within the configured delay (P.2002) from the closure command. In MAN it is a pre-alarm, in AUTO it is a deactivation (after three closure attempts). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 123: Short Circuit (50) (From Contact)

    P.2001 Function of the input T16 or equivalent for other inputs. P.2002 Delay for the input T16 or equivalent for other inputs. To disable: P.2002 = 0. Enabled in: MAN, AUTO. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 124: Over Speed (From Measure)

    DC250 can activate this shutdown even in presence of other shutdowns. 22 – Fail to start Icon: Type: Shutdown. Category: Battery protection. Related parameters: P.0211 Number of crank attempts. To disable: Enabled in: AUTO. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 125: Fail To Open Gcb / Fail To Disengage The Clutch

    26 – Low fuel level shutdown (from measure). Icon: Type: Shutdown. Category: Generic. Related parameters: P.0347 Shutdown level for low fuel tank level (%). P.0348 Delay for low fuel tank level shutdown. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 126: Low Fuel Level Pre-Alarm (From Contact)

    (function DIF.4213 “High fuel tank level pre-alarm” in parameter P.2001 or equivalent for other inputs) and the related delay is not zero (parameter P.2002 or equivalent for other inputs). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 127: High Fuel Level Pre-Alarm (From Measure)

    DC250 activates it if the coolant temperature is higher than or equal to the P.0335 threshold consecutively for the time P.0336, but only after P.0216 seconds from the start of the engine (it gives the possibility to start the engine with no load to cool it down). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 128: High Coolant Temperature Shutdown (From Contact)

    Related parameters: P.0216 Time mask for engine protections. P.0375 Shutdown level for high oil temperature (°C). P.0376 Delay for high oil temperature shutdown. To disable: P.0376 = 0. Enabled in: MAN, AUTO. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 129: Low Battery Voltage Pre-Alarm

    Icon: Type: Configurable. Category: Generic. Related parameters: P.0424 Maintenance interval 1 (running hours). P.0425 Kind of action for maintenance. To disable: P.0424 = 0. Enabled in: MAN, AUTO. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 130: Low Oil Pressure Shutdown (From Contact)

    P.0216 seconds from the start of the engine (it allows ignoring the normal low-pressure state at start-up). 43 – Low oil pressure pre-alarm (from contact) Icon: Type: Pre-alarm. Category: Engine protection. Related parameters: P.2001 Function of the input T16 or equivalent for other inputs. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 131: Low Oil Pressure Pre-Alarm (From Measure)

    5.7). To send the command it is necessary to write in sequence (within five seconds): • HOLDING REGISTER 101: write the password configured with parameter P.0004. • HOLDING REGISTER 102: write the value “99”. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 132: Maximum Power

    Loads protection. Related parameters: P.0102 Nominal voltage of the generator. P.0202 Hysteresis for generator’s measures. P.0391 Pre-alarm level for low voltage (27<). P.0392 Delay for low voltage pre-alarm (27<). Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 133: Clock/Calendar Not Valid

    DC250 activates the protection if, in the previous conditions, the generator voltage is higher than the threshold P.0393 consecutively for the time P.0394. 62 –CAN BUS connection failure Icon: Type: Configurable. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 134: Fuel Pump Failure

    DC250 activates it if the coolant temperature is lower than the P.0353 threshold consecutively for the time P.0354 (even with the engine stopped). 94 – Low current (from measure). Icon: Type: Configurable. Category: Generic. Related parameters: P.9840…P.9847 Rated current for light #x. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 135: 95 -Adblue Pump Failure

    "0". This condition must persist for the time configured with P.0387 (set the time to zero to disable the protection). P.0388 configures the type of anomaly. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 136: Communication Failure With The Ecu

    Icon: Type: Pre-alarm. Category: Engine protection. Related parameters: P.0700 Engine type. P.0704 Can-Bus anomalies disable mask. To disable: bit 11 di P.0704 = “1”. Enabled in: MAN, AUTO. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 137: Maximum Speed Shutdown From Can Bus

    DC250 enables this protection only if the operator configured the CAN BUS connection with the ECU (P.0700 different from zero). DC250 activates it when the ECU signals over the CAN BUS the high coolant temperature condition. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 138: Low Coolant Level Shutdown From Can Bus

    DC250 activates it when the ECU signals over the CAN BUS the low battery voltage condition. 142 – Low oil pressure shutdown from CAN BUS Icon: Type: Shutdown. Category: Engine protection. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 139: Low Oil Pressure Pre-Alarm From Can Bus

    Icon: Type: Shutdown. Category: Engine protection. Related parameters: P.0700 Engine type. P.0704 Can-Bus anomalies disable mask. To disable: bit 3 di P.0704 = “1”. Enabled in: MAN, AUTO. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 140: Water In Fuel Pre-Alarm From Can Bus

    DC250 activates it when the analogue input measures more than three thousand Ω from terminal T.14. 184 – Broken connection with a sensor (T.15) Icon: Type: Pre-alarm. Category: Generic. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 141: Yellow Lamp Pre-Alarm From Can Bus

    DC250 activates it when the ECU signals over the CAN BUS the yellow lamp condition. The bit thirteen of parameter P.0704 allows configuring the protection as a pre-alarm. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 142: Other Functions

    After the time configured in P.0590, DC250 automatically activates energy saving: the LCD display and all the lights go off. You can also manually force this mode by pressing and holding the STOP button for at least five seconds. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 143: Power Thresholds

    (if it exists). Parameter P.0482 configures the duration of this delay. During this delay, DC250 forces off the output, regardless of power. You may use this timing for allowing the system to stabilize. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 144: High Power

    The reset procedure is common to all the counters but acts only on the one visible on the multifunctional display. See paragraph 6 for the description of the display page that contains the counters. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...

  • Page 145: Clock/Calendar

    (“Clock/calendar updated”) when the operator sets the date/time (directly from the front panel or through the communication ports). 9.7 Plant name It is possible to assign a name to the system by entering it in parameter P.0456. DC250 does not use it. Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 146 DC250 Technical Manual This Page Intentionally Left Blank ENGLISH Code: EAAM075403EN Rev. 04 | Date: 14/04/2023 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 147 DC250 Technical Manual This Page Intentionally Left Blank ENGLISH Code: EAAM075403EN Rev. 04 | Date: 14/04/2023 Mecc Alte S.p.A. - Full or partial reproduction prohibited, if not authorized...
  • Page 148 UNITED KINGDOM SPAIN CHINA INDIA Mecc Alte U.K. LTD Mecc Alte España S.A. Mecc Alte Alternator Mecc Alte India PVT LTD 6 Lands’ End Way C/ Rio Taibilla, 2 (Nantong) Ltd Plot NO: 1, Talegaon Oakham Polig. Ind. Los Valeros 755 Nanhai East Rd Dhamdhere S.O.

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