Operating Instructions: Engine Control Computer (MFR) [PDF]

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Operating Instructions Engine control computer (MFR)

“Translation of the original instruction”

Information and Copyright

Subject to technical alterations in the interests of further development. The reprinting, reproduction and translation of this document, even in part, is forbidden without the express written agreement of MAN. All rights under copyright law are expressly reserved by MAN.

© 2011 MAN Truck & Bus AG Vogelweiherstraße 33 90441 Nürnberg Germany Tel.: Fax:

+49 911 / 420-1745 +49 911 / 420-1930

Email: Internet:

[email protected] www.man-engines.com

Editorial: EMDGG, Technical Status: 09.2011

2

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

Content Information and Copyright . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2

1

Construction and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

1.1

Construction of the MFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

1.2

Control of the engine with the MFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

1.2.1

Via digital and analog inputs on the MFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5

1.2.2

Via the customer CAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

1.2.3

Via the MFR display - Optional (se page 9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

1.3 2

Construction of the MFR display (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7

Installation - engine control computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

2.1

System construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

2.2

Method of installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10

2.3

2.4

2.5

2.2.1

Fixing of the MFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.2.2

Wiring of the MFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11

2.3.1

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3.2

CAN network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3.3

Digital switch summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.3.4

Analog acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.3.5

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

On and Off switching behaviour of the MFR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

19

2.4.1

Switch-on behaviour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.4.2

Switch-off behaviour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.4.3

Long term shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Function description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20

2.5.1

Engine start and stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2.5.2

Speed preselection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

2.5.3

Speed fine adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

2.5.4

Torque preselection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

2.5.5

Speed and torque limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2.5.6

Preselection of the Idle speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2.5.7

Preselection of engine control parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2.5.8

Request for engine brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.5.9

Start blocking (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

2.5.10 Bank switch off (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 2.5.11 MFR internal time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 2.5.12 Immobiliser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 2.5.13 Monitoring of the MFR and fault reactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 2.6

Diagnosis/fault display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38

2.6.1

On board diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

2.6.2

Off board diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

3

Content 3

4

Installation - MFR display (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

39

3.1

System construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

39

3.2

Method of installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

40

3.3

Connection of the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

40

3.3.1

Plug connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

3.3.2

CAN interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3.3.3

On / Off switching behaviour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3.4

Engine start / stop via the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

42

3.5

Function description of the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

43

3.5.1

display of the EDC and MFR faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

3.5.2

Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

3.5.3

Engine settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

3.5.4

Time / Date setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3.5.5

System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

3.5.6

Language setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

3.5.7

Contrast adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

Design and Function 1

Construction and function

1.1 Construction of the MFR View of the MFR:

The MFR has three connector chambers, in one of these there are no pins (3). In the connector chamber (1) the pins are prominent, however, not connected internally in the MFR. On delivery of the MFR this connector chamber is closed with a cover flap. Only connector chamber (2), is used, and it is here that the plug from the cable harness is plugged in.

1.2 Control of the engine with the MFR The MFR intervenes through appropriate set value preselections in the control and regulatory functions of the engine electronics. It provides the possibility of operating the engine in various ways and thereby works as a central coordina­ tor, which processes the requirements for the various functions. In the MFR a monitoring system for the important engine values is also integrated and it can here (in addition to the EDC) connect and monitor additional sensor systems. By monitoring the status of the outputs of the MFR the option exists for the provision of a visual fault dis­ play. With the aid of the MFR the engine can be operated in the following three different modes – to some extent a combination of these operating versions is possible:

1.2.1

Via digital and analog inputs on the MFR

An overview of the inputs provided on the MFR can be obtained from the circuit diagram. Details, of how the inputs are used in detail are presented in the respective sub-sections.

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

5

Design and Function 1.2.2

Via the customer CAN

It is possible to make preselections on the engine by means of the following „KSM message“. Transmission repetition rate:

50 ms

Data length:

8 bytes

Default priority:

3

Parameter group number:

0

Identifier:

0x0CEF27FD

Construction of the message:

Byte 1:

Selection of Speed / Torque Mode

Byte 2, 3:

Desired speed

Byte 4:

Desired quantity limitation

Byte 5:

Desired P-Grad (Speed droop) for the speed go­ vernor of the EDC

Byte 6:

Selection of EDC parameter sets

Byte 7:

Selection of EDC parameter sets and engine start / engine stop requirement

Byte 8:

Not used - assigned with 0xFF

For the complete construction of the message, see the document „Overview of CAN message customer CAN“. In addition, diverse information from the MFR can be received on the customer CAN, in which the most varied MFR and engine parameters are communicated. NOTE! This possibility of operation id blocked by default (unless explicitly ordered). However, the functionality can be activated and blocked at any time via the MFR display. If the reception of the KSM message is activated and this is received by the MFR, then the preselection can be treated with the highest priority and other preselections overwritten.

1.2.3

Via the MFR display - Optional (see Page 7)

By this means the engine can be started and stopped, specific engine regulation parameters can be set and engine values, such as temperatures and pressures can be displayed, which are available on the cu­ stomer CAN. A detailed fault display is also integrated here.

6

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

Design and Function 1.3 Construction of the MFR display (Optional) Front view of the MFR display:

(1) (2) (3) (4) (5)

LCD EDC fault Engine run MFR fault Engine STOP

(6) (7) (8) (9) (10)

DOWN ENTER MENU/BACK UP Engine START

The display has the following operating and display elements: -

Two buttons on the side, left Engine Start (10) and right Engine Stop (5)

-

4 buttons below (Up, Menu/Back, Enter and Down) with the following functionalities: - „Up“ button (9): Change up within a menu - „Menu/Back“ button (8): Change up one menu level - „Enter“ button (7): Change down one menu level, and input - „Down“ button (6): Change up within a menu

-

In the upper part of the display there are 3 LED’s: - A red fault LED left (2), which is switched on when there are active faults on the EDC (Master and/or Slave) - A second fault LED right (4), which is switched on when there are active faults on the MFR - A green LED (engine running) in the centre (3), which is switched on, when the engine is running

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

7

Design and Function -

One LCD in the centre (1) - After the run up of the display a basic page appears on this LCD: On this page the current engine speed and the time are faded in. You can return to the main menu by pressing the „Menu/Back“ button. After 3 minutes in a sub-menu there is an automatic change back to the basic page, when actions are no longer being taken in the sub-menu. The basic page is automatically vacated, when a new EDC or MFR fault occurs. The page with the new fault is automatically faded in.

8

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

Installation and Commissioning 2

Installation - Engine control computer (MFR)

2.1 System design Block diagram of the engine electronics Electronics structure of the plant equipment engine with connected MFR display (Option) and customer host computer:

The MFR display is, as shown, either hardwired to the system, or connected via the OBD connector as a “mobile Servicetool”.

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

9

Installation and Commissioning 2.2 Method of installation 2.2.1

Fixing of the MFR

The MFR can be attached via the four side bolt holes (unthreaded).

2.2.2

Wiring of the MFR

The MFR has to be wired as shown on the circuit diagram supplied. The scope of items, which the customer must then connect via the customer connector (designated as X2 in the circuit diagram), depends on the manner in which he wishes to control the engine. The MFR is specified for the following mechanical, electrical and climatic conditions: Protection class:

IP 52

Installed location:

Control cabinet A non−insulated (isolated?) mounting of the control unit is recommended

Installed position:

see housing drawing

Plug connector:

see housing drawing

Operating temperature:

- 40 °C ... + 80 °C

Voltage supply:

The MFR is designed for operation in 12V and 24V systems Minimum supply voltage (Terminal 30): 8 V Maximum supply voltage (Terminal 30): 32 V

Current consumption:

When the value of the voltage at terminal 15 drops below 8 Volt, the MFR is switched off Ignition (Terminal 15) off (< 2 V): < 4.5 mA Ignition (Terminal 15) on (> 8 V): < 100 mA (all outputs inactive)

The insulation resistance between the connection terminal 31 and the metal housing is at least 10 MOhm.

10

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

Installation and Commissioning 2.3 Interfaces 2.3.1

Power supply

The MFR has the following connections for the power supply: Terminal 30: Description:

Voltage supply from the battery

Signal type:

Analog voltage

The connection of the battery voltage PLUS (Terminal 30) to the MFR takes place via an 8A fuse. Terminal 15: Description:

Ignition switch

Signal type:

Analog voltage

The connection of the battery voltage PLUS to the MFR takes place via the ignition switch via a 10A fuse. Terminal 31:

2.3.2

Description:

Earth, battery

Signal type:

Earth, analog voltage

CAN network

See also system construction CAN interfaces The device communicates with its environment via a total of three CAN interfaces: Engine CAN Customer CAN CAN 3

to the EDC to the customer host computer and to the MFR display Diagnostic interface for the connection of the MAN Tester MAN cats

All three CAN interfaces operate in accordance with the Standard 2.0B (29 bit identifier), each with a trans­ fer speed of 250 kbit/s. A terminating resistor (120 Ω) for the customer CAN is integrated in the MFR control unit and can be optio­ nally connected in by connecting the corresponding terminals on the customer plug connector. A further terminating resistor must be installed on the other end of the CAN data bus. The maximum length of data line between the 2 terminating resistors must not exceed 40 m. When using stub lines, these must not be longer than 1m. If many stub lines are used, the distance between the indivi­ dual nodes must be at least 10 cm. The nodes in the stub lines should be ultrasonically welded; plug connections should be avoided unconditionally, due to the contact resistance. The data line should take the form of unshielded two-core twisted pair cable, with a cross-section of 1 mm² and a stroke rate of approx. 30/m. IMPORTANT! Component damage A terminating resistor is integrated in the MFR display. For this reason: S Consider a fixed, integrated terminating resistor when using an MFR display in a network with a “customer host computer”!

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

11

Installation and Commissioning CAN messages on the customer CAN The messages on the customer CAN predominantly satisfy the standard J1939. The possibility also exists to read out a large amount of information on the current engine operating state. The error messages are also read out via the CAN in the form of DM1 messages. The customer can set up the requirements for the engine via the KSM message described earlier. It is also possible to read out the error memory of the control units (EDC(en) and MFR) by DM4 Request.

2.3.3

Digital switch summary

The following applies for all switches: -

Input voltage, minimum: Input voltage, maximum: Minimum high level: Maximum low level:

0V 32 V 8V 2V

The inputs are protected in respect of short-circuiting to Terminal 30 and GND. Engine Start button / Terminal 50 The Engine Start button / Terminal 50 from the ignition lock is connected to the input for the engine start request: Engine Start: Description:

Engine start request

Signal type:

Binary signal to Terminal 30

Engine Stop button The Engine Stop button is connected to the engine stop request at the input: Engine Stop: Description:

Engine start request

Signal type:

Binary signal to Terminal 30

Switch for intermediate speed request For the selection of the desired intermediate speed through the binary code combination of two switches, these have to be connected to the two inputs: ZDR 1: Description:

Switch 1 for intermediate speed request

Signal type:

Binary signal to Terminal 15

Description:

Switch 2 for intermediate speed request

Signal type:

Binary signal to Terminal 15

ZDR 2:

12

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

Installation and Commissioning Button for the request Set+ / Set A constant speed requested as an intermediate speed can be finely adjusted via the two buttons. For this purpose these have to be connected to the two inputs. Set +: Description:

Increase intermediate speed by 1 1/min

Signal type:

Binary signal to Terminal 15

Description:

Reduce intermediate speed by 1 1/min

Signal type:

Binary signal to Terminal 15

Set :

Switch Quantity / Speed limitation The switch Quantity / Speed limitation is connected to the input, to provide for the request of a Speed permanently stored in the MFR and Quantity limitation: Quantity / Speed limitation: Description:

Request Speed and / or Quantity limitation

Signal type:

Binary signal to Terminal 15

Switch Quantity / Preselected Speed The Switch Quantity /Prescribed Speed is connected to the input in order to change over from prescribing the speed to prescribing the injection quantity: Changeover Speed / Prescribed Quantity: Description:

Request prescribed quantity (closed = prescribed quan­ tity; open = prescribed speed)

Signal type:

Binary signal to Terminal 15

NOTE! A prescribed value of the injection quantity through the MFR to the EDC is not provided for! (except via customer CAN) The engine does not go into idle on actuating the switch.

Start locking switch The start locking switch is connected to the input for acknowledgement of the gearbox neutral position as a condition to be checked (e.g. for start enable or switching off the bank): Start locking: Description:

Acknowledgement of gearbox neutral position

Signal type:

Binary signal to Terminal 15

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

13

Installation and Commissioning 2.3.4

Analog acquisition

All inputs are protected in respect of short-circuiting to Terminal 30 and GND. Sensor for coolant level in the expansion tank The coolant level sensor (MAN Part – Item number 51.27421-0257) for monitoring the coolant level in the expansion tank must be connected to the inputs: Coolant level_signal: Description:

Coolant level sensor signal

Signal type:

Analog signal

Description:

Coolant level sensor earth

Signal type:

Analog signal

Coolant level_GND:

NOTE! With a MAN solution with wiring harness the sensor is connected directly to the engine wi­ ring harness that is supplied. Information on the sensor supplied by MAN: Voltage supply:

24V UBatt – the supply is provided directly via the wiring harness

Sensor message delay:

7 seconds

Temperature resistance:

30 to +125 °C

Sensor installed position: The sensor is to be installed in the expansion tank in the position at which the coolant level has its lower limit. Since the sensor measures the level on the basis of the capacitive method, between the tip of the sensor and the sensor housing, its positioning in the expansion tank should be in accordance with the following: In plastic containers the sensor must not be installed from above, because otherwise the sensor housing has no contact with the medium. Information on the analog input of the MFR: Maximum MFR input voltage:

32 V

Maximum MFR input voltage:

0V

The input voltage at the analog input is reduced by a voltage divider, so that the input voltage at the microcon­ troller has the following value: UMFR_intern = ( 18 / 118 ) * USensor

14

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

Installation and Commissioning Sensor water level in the fuel pre-filter The water level sensor for monitoring the water level in the fuel pre-filter must be connected at the inputs: Water level_Signal: Description:

Water level sensor Signal

Signal type:

Analog signal

Description:

Water level sensor Earth

Signal type:

Analog signal

Water level_GND:

NOTE! With a MAN solution with wiring harness the sensor is connected directly to the engine wi­ ring harness that is supplied. The MFR input and the logic behind it is designed to monitor a fuel pre-filter from Mann&Hummel, PreLine Types PL 270 and PreLine Types PL 420. Information on the sensor: Voltage supply:

24V UBatt – the supply is provided directly via the wiring harness

Sensor message delay:

Depending on the soiling of the electrodes, 1 to 60 seconds.

Connection:

Single conductor 3 core 0.5 mm² with connector DIN 72585 A1 3.1 AG

Temperature resistance:

30 to +110 °C

Installed location of the Fuel pre-filter: The exact determination of where and how to install the fuel pre-filter, is given in the installation instructions.

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

15

Installation and Commissioning Intake depression sensor (optional) The intake depression sensor (MAN Part – Item number 51.274210237 ) for monitoring the intake air filter must be connected to the inputs: Intake depression_Signal: Description:

Intake depression sensor Signal

Signal type:

Analog signal

Description:

Intake depression sensor Earth

Signal type:

Analog signal

Intake depression_GND:

NOTE! With a MAN solution with wiring harness the sensor is connected directly to the engine wi­ ring harness that is supplied. Information on the sensor: Voltage supply:

24V UBatt – the supply is provided directly via the wiring harness

Sensor message delay:

< 4ms

Temperature resistance:

30 to +85 °C

Connection:

Bajonet connector plug DIN 72585 A1 3.1 Sn

Measurable pressure range:

0.5 to 0.5 Bar

Installed position of the intake depression sensor: The exact determination of where and how to install the sensor, is given in the installation instructions. Information on the analog input of the MFR: The sensor is connected via a galvanically isolated analog input (4 to 20mA). Maximum input current:

25 mA

Minimal input current:

2 mA

Resolution:

≤ 90μA in the input range 4...20mA

16

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

Installation and Commissioning Pedal travel sensor (optional) The pedal travel sensor (MAN Part – Item number 81.25970-6093) for accelerator pedal sensing is connec­ ted to the inputs: PWG +: Description:

Pedal travel sensor supply voltage ( 5V ) from the MFR

Signal type:

Analog signal

Description:

Pedal travel sensor signal

Signal type:

Analog signal

Description:

Pedal travel sensor GND

Signal type:

Earth, analog input

Description:

Pedal travel sensor idle-speed switch

Signal type:

Binary signal to Terminal 31

PWG Signal:

PWG GND:

PWG LGS:

The interfaces PWG +, PWG signal, PWG GND and PWG LGS are intended for the connection of an ana­ log, passive pedal travel sensor. The PWG is supplied from the MFR with 5V and earth. The pedal “position is derived from the fed back, analog signal ”PWG signal . An idle-speed switch PWG LGS is used for plausibility monitoring. The switch point of the idle-speed switch lies at 569...976 mV (typically 800 mV). The evaluation takes place at fixed voltage limits based on a pedal travel sensor supply of 5.00 V: PWG Signal [V]

Pedal Position

< 0.15

snv

0.4 ... 3.372

0 ... 100 % (linear)

> 4.50

snv

Idle-speed switch

Remarks fault fault

= 1.1

closed

if not closed: Plausibility Error (Monitoring blocked by default)

NOTE! This PWG can be reproduced by a simple potentiometer. (For the fine speed adjustment functionality with PWG, or potentiometer) However, during operation the MIN and MAX voltage limits described above should be re­ tained, since the MFR will otherwise detect a fault and continue to operate internally with the pedal position of 0 %. (The monitoring of the LGS is deactivated in the MFR by default.) Replacement circuit diagram for the pedal travel sensor:

Carefully read the Operating Instructions before starting any work! This is especially valid for the chapter on General Safety Instructions and the safety instructions in each of the chapters.

17

Installation and Commissioning 2.3.5

Outputs

Warning lamps The MFR has eight digital outputs, which are provided for the triggering of lamps: -

Engine running MFR fault (display of an active MFR fault) MFR fault (display of an active EDC fault) Overspeed Oil pressure fault Coolant temperature too high Water level in the fuel pre-filter too high Coolant level in the expansion tank too low

The outputs are switched active, when the respective attachment requirement is met.

Electrical information on the digital outputs of the MFR: When the output is active the following applies: Maximum output current: 300 mA Maximum output voltage: UBat – 0.2 V Minimum output voltage: UBat – 1.0 V (UBat is the supply voltage at Terminal 30.) All output are short-circuit protected. TDS Signal The unit has a frequency output. The output frequency represents the current speed (TDS Signal). The frequency is converted into a speed as follows:

Current speed ( U/min ) = output frequency ( Hz ) * 10 Electrical information on the digital outputs of the MFR: When the output is active the following applies: Minimum output frequency: Maximum output frequency: Accuracy of the output frequency: Duty cycle of the output frequency: Maximum voltage at the output: Minimal voltage at the output: Maximum current at the output:

4 Hz 3 kHz < ± 0.5 % typical 50 %, min. 45 %, max. 55 % UBat - 1.0V at 0.4 mA load current