Mantracourt DSC Manuel utilisateur

DSC/DLC User Manual

mantracourt.com

DSC/DLC

 
Mantracourt Electronics Limited DSC/DLC User Manual 
1 
Introduction ..........................................................................................................................................................3
Navigating This Manual ...........................................................................................................................................................................3 
General features ..........................................................................................................................................................................................3 
Product codes explained..........................................................................................................................................................................3 
Which version do I need? ........................................................................................................................................................................3 
Installation ............................................................................................................................................................5
Mounting .......................................................................................................................................................................................................5 
General .......................................................................................................................................................................................................5 
DLC...............................................................................................................................................................................................................5 
DSC ..............................................................................................................................................................................................................5 
Wiring ..............................................................................................................................................................................................................6 
General .......................................................................................................................................................................................................6 
DLC Wiring................................................................................................................................................................................................7 
DSC Wiring............................................................................................................................................................................................. 11 
DSC Toolkit ........................................................................................................................................................ 18 
Overview...................................................................................................................................................................................................... 18 
What can the Toolkit do?................................................................................................................................................................. 18 
Installing the DSC Toolkit ..................................................................................................................................................................... 18 
Toolkit Details............................................................................................................................................................................................ 19 
Home........................................................................................................................................................................................................ 19 
Information............................................................................................................................................................................................ 25 
Communication.................................................................................................................................................................................... 26 
Save and Restore................................................................................................................................................................................. 39 
Logging ................................................................................................................................................................................................... 40 
Data rate and Filters........................................................................................................................................................................... 42 
User Area ................................................................................................................................................................................................ 43 
End User Calibration .......................................................................................................................................................................... 44 
OEM Advanced Calibration ............................................................................................................................................................. 52 
Advanced Usage ................................................................................................................................................ 65 
The Measurement/Readings Process............................................................................................................................................... 65 
Electrical.................................................................................................................................................................................................. 65 
Cell ............................................................................................................................................................................................................ 65 
System ..................................................................................................................................................................................................... 65 
Changing Sensitivity ............................................................................................................................................................................... 66 
DLC............................................................................................................................................................................................................ 66 
DSC ........................................................................................................................................................................................................... 67 
Specifications..................................................................................................................................................... 68 
DLC and DSC.............................................................................................................................................................................................. 68 
Technical Specifications.................................................................................................................................................................... 68 
Appendices......................................................................................................................................................... 70 
Appendix A - Communication Interface ......................................................................................................................................... 70 
RS232 ....................................................................................................................................................................................................... 70 
RS485 ....................................................................................................................................................................................................... 70 
CAN........................................................................................................................................................................................................... 70 
Appendix B - Communication Protocol .......................................................................................................................................... 71 
ASCII ......................................................................................................................................................................................................... 71 
Mantrabus II .......................................................................................................................................................................................... 74 
Modbus RTU ......................................................................................................................................................................................... 76 
MantraCAN............................................................................................................................................................................................ 79 
CANopen® ............................................................................................................................................................................................ 83 
Appendix C - Commands ..................................................................................................................................................................... 89 
Command list ASCII, Mantrabus, Modbus ................................................................................................................................ 89 
Parameter Detail General................................................................................................................................................................. 90 
Command List MantraCAN ............................................................................................................................................................. 95 
Parameter List CANopen................................................................................................................................................................103 

 
Mantracourt Electronics Limited DSC/DLC User Manual 
2 
Appendix D - Product code list........................................................................................................................................................104 
DLC..........................................................................................................................................................................................................104 
DLC..........................................................................................................................................................................................................104 
Appendix E - Accessories....................................................................................................................................................................105 
DTEMP ...................................................................................................................................................................................................105 
DSJ1 ........................................................................................................................................................................................................106 
DSJ4 ........................................................................................................................................................................................................108 
Appendix F - Digital Filtration...........................................................................................................................................................110 
Appendix G - Toolkit Supported CAN Controllers ...................................................................................................................111 
Appendix H - Trouble Shooting.......................................................................................................................................................112 
Status LED ............................................................................................................................................................................................112 
Diagnostic Flags.................................................................................................................................................................................112 
No Communications ........................................................................................................................................................................112 
Bad Readings ......................................................................................................................................................................................113 
Unexpected Warning Flags ...........................................................................................................................................................114 
Problems with Bus Baud Rate ......................................................................................................................................................114 
Port problems.....................................................................................................................................................................................114 
Recovering a lost DSC/DLC ...........................................................................................................................................................115 
Appendix I - Known Issues.................................................................................................................................................................116 
Finite Non-Volatile Memory Life.................................................................................................................................................116 
CANopen ..............................................................................................................................................................................................116 
Appendix J - Declaration of Conformity .......................................................................................................................................117 
Appendix K - Warranty ........................................................................................................................................................................118 
 

Mantracourt Electronics Limited DSC/DLC User Manual

Introduction

Navigating This Manual

When viewing this PDF manual the following tips will help you navigate.

Viewing bookmarks ( or ) to the side of the page, in the PDF viewer, will allow easy navigation to the relevant

chapters of this manual. Alt-left arrow is a useful shortcut back to the last page viewed after a hyperlink is clicked.

Hyperlinks are coloured purple and are underlined.

General features

Mantracourt’s DSC/DLC is a range of products for digitizing a strain-based bridge input such as a load cell. The

DSC is a card type with pins for easy installation while the DLC is a disc designed to be fitted inside the pocket of

a load cell or other sensor.

Accessories available include an external temperature sensor (DTEMP), one- and four-way mounting boards with

two-part connectors (DSJ1 and DSJ4) and a display unit for use with the Mantrabus versions (DS485DIS). These

are detailed later.

Setup and configuration is made easier with the free Toolkit software but can be achieved via comms if necessary.

Product codes explained

See Appendix D for full list of available types.

Different stabilities are detailed in the specification.

The implementation of the communication interfaces and protocols are detailed here.

Which version do I need?

The choice of hardware interface, RS232, RS485 or CAN, is dependent on the interface available at the other end, whether it’s a

single or multiple units required as RS232 is only suitable for one-to-one connections and RS485 and CAN are suitable for

single and multi-drop applications. Another factor is length of cables required as RS232 is typically used for cable lengths of

approx. 25m. RS485 has a differential topology and is better for noise immunity.

Mantracourt Electronics Limited DSC/DLC User Manual

The choice of protocol is normally based on what master/controller is to be used which may also depend on other third party

devices on the bus. Modbus is a standard protocol so multi vendor devices can all work happily using this standard protocol.

Mantrabus is a hex based protocol which has fewer packet overheads. It is a proprietary protocol so only Mantracourt

products can operate on the bus. ASCII may be chosen as it may seem easier to write software for and debug. When ASCII is

used in a streaming mode then this can feed directly into an ASCII display terminal or viewed directly on a PC using a

terminal/teletype software tool.

Again, CAN based systems will depend on what you already have. CANopen is a well established protocol administered by the

CiA. MantraCAN is a proprietary CAN protocol that can be made to mimic other protocols such as J1939 by setting up custom

messages. If you are creating your own stand alone system MantraCAN may be easier to implement than CANopen.

Mantracourt Electronics Limited DSC/DLC User Manual

Installation

Mounting

General

It is advisable to follow the below installation practice where possible

•Minimise vibration

•Do not mount next to strong electrical or magnetic fields (transformers, power cables)

•Always ensure the device is secure and protected from damage

DLC

The DLC is designed to be sealed in the pocket of the sensor, which provides electrical shielding for EMC and

noise as well as mechanical and moisture protection. If mounting outside the sensor, then it is unlikely to achieve

specified performance.

The DLC must be mounted using a 2 mm screw to the body of the sensor. This should be a good electrical

connection to obtain optimal performance.

The 2 mm mounting hole accepts M2 screw or American equivalent #0-80.

Important Note: DO NOT USE #2 screw size.

Additional moisture protection can be obtained using a potting compound such as a two-part epoxy. Care must

be taken to avoid any gaps as the resulting mechanical stresses could damage the device. The compound chosen

must be specified for electrical use and have enough thermal conductivity for the heat generated by the device.

(Up to 1 W with a 15 V supply).

DSC

The DSC is normally installed in a protective enclosure, such as a metal box.

The pins can be plugged into standard (2.54 mm pitch) PCB header sockets or soldered directly into a host board

or to connecting wires.

It can be mounted either way up. Unwanted pins projecting on one side may be cropped off (carefully!)

For extra vibration resistance and grounding, the 3 mounting holes provided can be used.

If necessary, the protruding end with single hole can be cut off to make board smaller. However this needs to be

done with great care so that damage does not occur.

Mantracourt Electronics Limited DSC/DLC User Manual

Wiring

General

All the sensor wires should be kept as short as feasible.

The EXC+/–wires should be a twisted pair, also the SIG+/–pair, and the two pairs kept apart. It is also

recommended to secure the wires from moving due to shock or vibration.

The cable must enter the load cell via an EMC cable gland, which connects the cable shield to the load cell body.

This must be a 360-degree connection.

To obtain the best EMC results, wire as shown in wiring examples below. However, this has the potential to create

earth loops.

Devices are protected against shorting of communications lines to power supply and shorting of sensor inputs.

There is no over current protection in case of faults so power limiting or fusing should be provided.

Power and communication should use twin (or triple for RS232) twisted pair cable with independent shields.

Characteristic impedance should be 50-150 ohms and core to core/shield to core capacitance should be below

300 pF/m. (EG Belden type 8723 or 8777)

Soldering

Use a temperature controlled soldering iron set to a maximum of 330 °C, for no longer

than 2 seconds per pad. Excessive heat transferred to the PCB will result in damage.

Do not use solder with a water soluble flux. This can leave a surface film which attracts

moisture and degrades measurement performance.

Mantracourt Electronics Limited DSC/DLC User Manual

DLC Wiring

Connecting wires are soldered directly to the pads on the top and/or bottom of the PCB. Care must be taken to

electrically insulate the connection pads from the surrounding metal.

The wiring on the load cell side should ideally be kept to less than 20 cm.

RS485

For products DLCHASC, DLCHMAN, DLCHMOD, DLCSASC, DLCSMAN, DLCSMOD.

Pinout

Item

Description

Mounting hole

For mounting and grounding (see mounting above)

EXC+/-

Excitation for bridge sensor

SIG+/-

Signal from bridge sensor

V+/-

Power supply for DLC (5.6-18 VDC)

A+/B-

RS485 connections (note these can be referred to in several different ways, depending

on the manufacturer)

DQ (TEMP)

Connection for DTEMP device (EXC- of DTEMP should be connected to V-)

LED

Status LED. (see troubleshooting)

There MUST be a common connection from the PSU V- and the RS485 master’s ground to ensure the RS485

stays within the required common mode voltage of +/-7 V.

The shield should be connected to the grounded enclosure of the power supply.

120 ohm termination resistors should be used at either end of the bus to stop reflections.

Pad Positions

(mm from 0,0)

Hole diameter

Mounting hole

0.0

+7.9

2.0

-V

+6.2

+6.1

1.0

+7.9

+3.8

1.0

RS485-(B)

+5.8

-6.6

1.0

RS485+ (A)

+3.6

-8.1

1.0

Temp sensor DQ

-1.3

-8.8

1.0

+EXC

-7.5

-4.9

0.7

+SIG

-8.8

-1.5

0.7

-SIG

-8.0

+3.9

0.7

-EXC

-6.3

+6.1

0.7

Mantracourt Electronics Limited DSC/DLC User Manual

Wiring Example

Mantracourt Electronics Limited DSC/DLC User Manual

CAN

For products DLCHCAN, DLCHCOP, DLCSCAN, DLCSCOP.

Pinout

(note: stacked PCB assembly)

Item

Description

Mounting hole

For mounting and grounding (see mounting above)

EXC+/-

Excitation for bridge sensor

SIG+/-

Signal from bridge sensor

V+/-

Power supply for DLC (5.6-18 VDC)

CAN L/H

CANbus connections

DQ (TEMP)

Connection for DTEMP device (EXC- of DTEMP should be connected to V-)

LED

Status LED. (see troubleshooting)

There MUST be a common connection from the PSU and the CAN ground to ensure the CAN stays within the

required common mode voltage of -2v (CANL) to +7v (CANH).

The shield should be connected to the grounded enclosure of the power supply.

120 ohm termination resistors should be used at either end of the bus to stop reflections.

For bus rates greater than 500 kbps cable such as Belden 8132 is recommended.

Pad Positions

(mm from 0,0)

Hole diameter

Mounting hole

0.0

8.1

2.0

-V

-3.2

-7.9

1.0

-5.4

-6.6

1.0

CAN L

8.0

1.7

1.0

CAN H

8.2

-3.0

1.0

Temp sensor DQ

7.1

-5.0

1.0

+EXC

-7.5

-4.9

0.7

+SIG

-8.8

-1.5

0.7

-SIG

-8.0

3.9

0.7

-EXC

-6.3

6.1

0.7

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