Delta DVP02LC-SL Bedienungsanleitung

DVP02LC-SL

Load Cell Module

Operation Manual

DVP-0071020-01

Load Cell Module DVP02LC-SL

DVP-PLC Operation Manual 1

Warning

3This operation manual provides introduction on the functions, specifications, installation, basic operation

and settings for DVP02LC-SL and information on load cell measurement.

3This is an OPEN TYPE device and therefore should be installed in an enclosure free of airborne dust,

humidity, electric shock and vibration. The enclosure should prevent non-maintenance staff from

operating the device (e.g. key or specific tools are required to open the enclosure) in case danger and

damage on the device may occur. DO NOT touch any terminal when the power is switched on.

3Please read this operation manual thoroughly and follow the instructions in case damages on the device

or injuries on the operation staff occur.

Table of Content

1Theory of Load Cell...............................................................................................................................3

2Introduction to DVP02LC-SL.................................................................................................................3

2.1 Functions...................................................................................................................................4

2.2 Effective Number of Bits (ENOB) ..............................................................................................4

3Product Profile and Outline ...................................................................................................................5

3.1 Dimensions................................................................................................................................5

3.2 Product Profiles .........................................................................................................................5

3.3 Terminal Layout .........................................................................................................................6

3.4 LED Indicators...........................................................................................................................6

4Installation and Wiring...........................................................................................................................6

4.1 Connecting DVP02LC-SL to DVP-SV series PLC MPU............................................................6

4.2 Installing DVP02LC-SL and DVP-SV Series PLC MPU into DIN Rail .......................................7

4.3 Communication .........................................................................................................................7

4.4 External Wiring ..........................................................................................................................8

5Functions of DVP02LC-SL ....................................................................................................................9

5.1 Control Registers (CR) ..............................................................................................................9

5.2 Explanations on Control Registers .......................................................................................... 11

5.3 Further Explanations on Each Function ..................................................................................17

5.3.1 Measure the Weight ................................................................................................................17

5.3.2 Standstill Check.......................................................................................................................17

5.3.3 Determining Zero Point ...........................................................................................................18

5.3.4 Filtering....................................................................................................................................18

6Setting up DVP02LC-SL in Software...................................................................................................19

6.1 Initial Settings..........................................................................................................................19

6.2 Communication Settings .........................................................................................................21

Load Cell Module DVP02LC-SL

DVP-PLC Operation Manual

6.3 Parameter Settings................................................................................................................. 23

6.4 Correction Settings ................................................................................................................. 25

6.5 Status Settings........................................................................................................................ 26

7Steps of Correction............................................................................................................................. 28

7.1 Correction by MPU ................................................................................................................. 28

7.2 Correction by Software ........................................................................................................... 29

8Application Examples ......................................................................................................................... 31

9LED Indicators and Trouble-shooting ................................................................................................. 35

9.1 LED Indicators ........................................................................................................................ 35

9.2 Trouble-shooting..................................................................................................................... 36

Load Cell Module DVP02LC-SL

DVP-PLC Operation Manual 3

1 Theory of Load Cell

When metallic materials encounter a pulling force or tension, they will become thin, and the electrical

resistance will increase. In other words, when the materials are compressed, the resistance will

become small. The strain meter adopting this theory is called a load cell. Such sensing device is able to

convert physical pressure changes into output electrical signals and is widely used in loading, tension

and pressure conversion applications.

2 Introduction to DVP02LC-SL

1. Thank you for choosing Delta DVP02LC-SL load cell module. DVO02LC-SL provides 24-bit

resolution applicable for 4-wire or 6-wire load cells with various eigenvalues. Therefore, the

response time can be adjusted in coordination with each other according to users’ needs. On this

basis, the market requirements on weight measurement can easily be met.

2. To ensure correct installation and operation of DVP02LC-SL, please read this operation manual

carefully before using it. This operation manual only provides introductory information on

DVP02LC-SL. For more detailed information on the theory of load cell, please refer to relevant

references of literature.

3. The DVP02LC-SL load cell module is able to read/write data by using FROM/TO instructions

through the DVP series PLC MPUNote.

Note: The MPU (main processing unit) refers to PLC compatible with left-side extension, e.g. DVP-SV,

DVP-EH2-L, DVP-SA2, DVP-SX2 series PLC.

Load Cell Module DVP02LC-SL

DVP-PLC Operation Manual

2.1 Functions

Rated power supply

voltage/power consumption 24 VDC (-15 to +20%)/3 W

Voltage boundary 18 to 31.2 VDC

Max. current consumption 125 mA

Input signal range ±40 mVDC

Sensibility +5 VDC +/-10%

Internal resolution 24 bits

Communication port RS-232, RS-485

Applicable sensor type 4-wire or 6-wire load cell

Temperature coefficient span ≤± 50 ppm/K v. E

Temperature coefficient zero

point ≤± 0.4 μV/K

Linearity error ≤0.02%

Response time 2, 10, 20, 40, 80 ms × number of channels

4 measuring ranges 0 to 1, 0 to 2, 0 to 4, 0 to 6 mV/V

Max. distance for connecting

to load cell 100m

Max. current output 5 VDC × 300 mA

Permitted load cell

resistance 40 to 4,010 Ω

Common mode rejection

(CMRR @50/60 Hz) ≥100dB

Dynamic value filter Setting range: K1 to K5

Average value filter Setting range: K1 to K100

Isolation method

500 VAC between digital circuits and ground

500 VAC between analog circuits and ground

500 VAC between analog circuits and digital circuits

Serial connection to

DVP-PLC MPU

Connectable to the left side of the MPU, numbered from 100 to 107

according to the position of the module from the closest to the

farthest to the MPU.

Operation/storage

Operation: 0 to 55°C (temperature),50 to 95% (humidity), pollution

degree 2

Storage: -25 to 70°C (temperature), 5 to 95% (humidity)

Vibration/shock immunity International standards: IEC 61131-2, IEC 68-2-6 (TEST Fc)/IEC

61131-2 & IEC 68-2-27 (TEST Ea)

2.2 Effective Number of Bits (ENOB)

CR#3: Reaction time for measurement*

Load cell

eigenvalue

CR#2:

eigenvalue*2 ms 10 ms 20 ms 40 ms 80 ms

0 to 1 mV/V 0 18 19.1 19.5 19.8 20.2

1 to 2 mV/V 1 19 19.6 20.1 20.3 20.7

2 to 4 mV/V 2 19 20 20.5 20.7 21

4 to 6 mV/V 3 19 20 20.4 20.5 20.8

Load Cell Module DVP02LC-SL

DVP-PLC Operation Manual 5

Example: If you use a load cell of eigenvalue 3.8 mV/V, please set CR#2 to “2” to acquire the best

ENOB. When CR#3 is set to “2 ms”, the ENOB will be 19 bits. When CR#3 is set to “20 ms”, the

ENOB will be 20.5 bits.

* For explanations on CR#2 and CR#3, see 5.2.

3 Product Profile and Outline

3.1 Dimensions

3 mm

90 mm

33 mm

60 mm

CH2

CH1

DVP02LC

MAX

MOTION

MAX

NET

ZERO

MOTION

ERROR

ZERO

NET

L.V

POWER

RUN

SHD

SEN+

EXC+

SIG+

SEN-

SIG-

EXC-

SEN+

SEN-

SHD

SIG-

SIG+

EXC+

EXC-

3.2 Product Profiles

CH2

CH1

DVP02LC

MAX

MOTION

MAX

NET

ZERO

MOTION

ERROR

ZERO

NET

L.V

POWER

RUN

SHD

SEN+

EXC+

SIG+

SEN-

SIG-

EXC-

SEN+

SEN-

SHD

SIG-

SIG+

EXC+

EXC-

1. Mounting hole for the I/O module 2. DIN rail slot (35mm)

3. I/O module connection port 4. I/O module clip

5. Status indicators (POWER, RUN,

ERROR, L.V) 6. Function status indicators (NET,

ZERO, MAX, MOTION)

7. I/O terminals 8. RS-232 port

9. DIN rail clip 10. RS-485 port

11. DC power input

Load Cell Module DVP02LC-SL

DVP-PLC Operation Manual

3.3 Terminal Layout

DVP02LC-SL

SEN-SEN+SIG-SIG+EXC-EXC+ SIG+EXC-EXC+SHD SHDSEN-SEN+SIG-

CH1 CH2

3.4 LED Indicators

LED Color Function

POWER Green Indicating the power supply status.

RUN Green Indicating the operating status of DVP02LC-SL.

ERROR Red Indicating error statuses.

L.V Red Indicating low voltage from the external power supply.

NET Orange Indicating net/gross weights.

ZERO Orange Indicating the zero point weight.

MAX Orange Indicating the maximum weight.

MOTION Orange Indicating stable measurements.

4 Installation and Wiring

4.1 Connecting DVP02LC-SL to DVP-SV series PLC MPU

Open the fixing clips on the top and bottom at the left side of DVP-SV series PLC MPU. Meet

the connection ports alongside the 4 corners of DVP02LC-SL with DVP-SV, as step ①.

Press the fixing clips on the top and bottom of the DVP-SV series PLC MPU and check if the

connection is tight enough, as step ②.

DVP28SV

RUN

STOP

CH 2

CH 1

DVP02LC

MAX

MOT ION

MAX

NE T

ZERO

MOT ION

ERROR

ZERO

NE T

L. V

POWER

RU N

SHD

SEN+

EXC+

SIG+

SEN-

SIG-

EXC-

SEN+

SEN-

SHD

SIG-

SIG+

EXC+

EXC-

Load Cell Module DVP02LC-SL

DVP-PLC Operation Manual 7

4.2 Installing DVP02LC-SL and DVP-SV Series PLC MPU into DIN Rail

Use 35mm DIN rail.

Open the DIN rail clips on DVP02LC-SL and DVP-SV series PLC MPU and insert them onto the

DIN rail.

Clip up the DIN rail clips to fix them on the rail.

35mm DIN Rail

4.3 Communication

Please follow the PIN definitions for the wiring.

8 PIN MINI DIN

9 PIN D-SUB female

PC COM Port DVP02LC COM Port

Rx 2

1,2

GND

There are 2 communication interfaces in DVP02LC-SL available for the communication with the

PC or other devices. COM1 is the RS-232 port, and COM2 is the RS-485 port. Both ports

comply with standard Modbus protocol. The PC can communicate directly with DVP02LC-SL

through COM1.

We recommend you use Delta’s power supply modules for DVP02LC-SL.

RS2

Load Cell Module DVP02LC-SL

DVP-PLC Operation Manual

4.4 External Wiring

(100 or less)

CH1

SIG+

SIG-

SEN+

SEN-

Terminal

of power

module System

grounding

Grounding

EXC+

EXC-

SIG+

SIG-

SEN+

SEN-

EXC+

EXC-

A+5V

AGND

A+5V

AGND

24V

DC/DC A+5V

AGND

Converter

4 strain guage

6 strain guage

CH2

Many load cells connected in parallel connected to a single DVP02LC-SL:

Load Cell

CH1

CH2

DVP02LC

Load Cell

Note 1: Please connect the on both the power module and load cell module to the system earth

point and ground the system contact or connect it to the cover of the power distribution cabinet.

Note 2: When many load cells are connected in parallel, the total impedance shall be bigger than

40Ω.

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