Delta DVP02LC-SL User Manual

2010-09-24

5012602300

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DVP-1071070-01

…………………………………………………………………  ENGLISH  …………………………………………………………………

Thank you for choosing Delta’s DVP series PLC. Delta releases DVP02LC-SL load cell
module of weight measurement function. DVP02LC-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.

a This instruction sheet provides introductory information on electrical specifications,

general specifications, installation and wiring.

a This is an OPEN TYPE I/O module 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.

a DO NOT connect the input AC power supply to any of the I/O terminals; otherwise

serious damage may occur. Check all the wiring again before switching on the power.
Make sure the ground terminal is correctly grounded in order to prevent
electromagnetic interference.

a The tightening torque for I/O terminal block is 1.95 kg-cm (1.7 in-lbs). Use 60/75°C

copper conductors only.

 Product Profile & Dimensions

3 mm

DVP02LC

POWER

EXC+

RUN

EXC-

ERROR

SIG+

L.V

CH1

SIG-

SEN+

SEN-

NET

SHD

ZERO

MAX

MOTION

EXC+

90 mm

EXC-

SIG+

CH2

SIG-

NET

SEN+

ZERO

SEN-

MAX

SHD

MOTION

60 mm

33 mm

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

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

5.
(POWER, RUN, ERROR and L.V)

Function status indicator

6.
(NET, ZERO, MAX, MOTION)

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

9. Mounting slot clip 10. RS-485 port

11. DC power input

 I/O Terminal Layout

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

DVP02LC-SL

CH1 CH2

- 1 -

[ Fi gure 1 ]

 External Wiring

4 strain guage

6 strain guage

Terminal
of power
module

Note 1: Please connect the terminal 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 power distribution
cabinet.

Grounding

*1

System
grounding

(100 or less)

EXC+

EXC­SIG+

SIG-

SEN+

SEN-

EXC+

EXC­SIG+

SIG-

SEN+

SEN-

0V
24V

A+5V
AGND

A+5V
AGND

DC/DC

Converter

CH1

CH2

A+5V

AGND

[ Fig ure 2 ]

 Electrical Specifications

Load cell module Voltage output

Rated power supply voltage/
power consumption

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

point
Linearity error ≤ 0.02%
Response time 2, 10, 20, 40, 80 ms × channels
4 measuring ranges 0 to 1 mV/V, 0 to 2 mV/V, 0 to 4 mV/V, 0 to 6mV/V
Max. distance for connecting

to load cell
Max. current output 5 VDC * 300 mA
Permitted load cell resistance 40 to 4,010 Ω
Common mode rejection

(CMRR @50/60 Hz)
Dynamic value filter Setting range: K1 to K5
Average value filter Setting range: K1 to K100

Isolation method

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

≤ ± 0.4 μV/K

100 M

≥100dB

500 VAC between digital circuits and Ground
500 VAC between analog circuits and Ground
500 VAC between analog circuits and digital circuits

- 2 -

Load cell module Voltage output

Series connection to
DVP-PLC MPU

Operation / storage
temperature

Vibration / shock immunity

 Complying with DIN1319-1, the tolerance of measured value should be ≤ 0.05% under 20°C

+ 10K temperature range

 When the corrected ambient temperature and the actual temperature have a difference of

more than 10°C, it is suggested that you re-correct it.

Connectable to the left side of MPU, numbered from 100 to
107 according to the position of module from the closest to
farthest to MPU.

Operation: 0 to 55°C (temp.), 50 to 95% (humidity), pollution
degree 2

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

International standards: IEC61131-2, IEC 68-2-6 (TEST Fc)/
IEC61131-2 & IEC 68-2-27 (TEST Ea)

.

 Control Register

CR# Add. Attrib. Register name Explanation

#0 H1000 O R Model name

#1 H1001 O R Firmware version Display the current firmware version in hex.

#2 H1002 O R/W Characteristic value

#3 H1003 O R/W

#4 H1004 O R

#6 H1006 X R/W

#7 H1007 O R/W

#8 H1008 O R/W CH1 tare weight

#9 H1009 O R/W CH2 tare weight
#10 H100A O R/W CH1 average times
#11 H100B O R/W CH2 average times

#12 H100C X R CH1 average weight

#13 H100D X R CH2 average weight

#14 H100E X R CH1 present weight
#15 H100F X R CH2 present weight
#16 H1010 O R/W CH1 standstill times
#17 H1011 O R/W CH2 standstill times

Reaction time for
measurement

Average value of all
channels

CH1 to CH2 read tare
weight

CH1 to CH2 gross/net
weight

Set up by the system:
DVP02LC-SL model code = H’4206

Mode 0 (H’0000): 1 mV/V
Mode 1 (H’0001): 2 mV/V, default
Mode 2 (H’0002): 4 mV/V
Mode 3 (H’0003): 6 mV/V

Mode 0 (H’0000): 2 ms
Mode 1 (H’0001): 10 ms
Mode 2 (H’0002): 20 ms
Mode 3 (H’0003): 40 ms
Mode 4 (H’0004): 80 ms, default

Sum up CH1 average value and CH2
average value and equalize them.

Equation: (CH1 average value + CH2
average value)/2

Read present average value as tare weight
value

bit0: CH1; bit1: CH2; bit2 to bit15: reserved

Display present weight as Gross (K0) or Net
(K1). bit0 to bit3: CH1; bit4 to bit7: CH2; bit8
to bit15: reserved.

Take CH1 for example: bit3 to bit0 = 0000,
gross; bit3 to bit0 = 0001, net; bit3 to bit0 =
1111, channel disabled.

The user can write in the weight or read it by
commands.

Default: K0; Range: -K32,768 to K32,767.

Default: K10; Range: K1 to K100.
When the set value exceeds the range, it will

automatically be changed to K1 or K100.

Display average weight.

Display present weight.

Default: K5
Range: K1 to K500

- 3 -

CR# Add. Attrib. Register name Explanation

#18 H1012 O R/W CH1 standstill range
#19 H1013 O R/W CH2 standstill range
#20 H1014 O R/W CH1 decimal place
#21 H1015 O R/W CH2 decimal place

#22 H1016 O R/W
#23 H1017 O R/W
#24 H1018 O R/W
#25 H1019 O R/W

#26 H101A X R/W

#33 H1021 O R/W

#34 H1022 O R/W

CH1 unit of
measurement

CH1 unit of
measurement

CH2 unit of
measurement

CH2 unit of
measurement

Weight correction
command

CH1 weight base
point

CH2 weight base
point

#35 H1023 O R CH1 max. weight
#36 H1024 O R CH2 max. weight

#37 H1025 O R/W

#38 H1026 O R/W

#39 H1027 O R/W

#40 H1028 O R/W

#41 H1029 X R/W

Upper limit for CH1
zero point check

Upper limit for CH2
zero point check

Lower limit for CH1
zero point check

Lower limit for CH2
zero point check

Saving set value
(H’5678)

Default: K10
Range: K1 to K10,000

Default: K2
Range: K1 to K4

Enter max. 4 ASCII words.
CR#22, CR#24: High word
CR#23, CR#25: Low word

For the user to correct the weight.
Default: H’0000
H’0001: CH1 Reset to zero command
H’0002: CH1 Weight base point command
H’0003: CH2 Reset to zero command
H’0004: CH2 Weight base point command

For CR#33 to CR#34 default = K1,000;
Range: K-32,768 to K32,767

Steps for correction: Take CH1 for example
1: Place no weights on the load cell
2: Set up CR#26 command = “H’0001”
3: Place standard weights on load cell
4: Write the weight of the weights on the plate

into CR#33.

5: Set up CR#26 command = “H’0002”

Set up the max. weight. When the measured
value exceeds the set value, error codes will
be recorded.

Reference for reset to zero. When the weight
is within this range, the status code will be set
to “zero bit”, indicating the current zero
weight status.

Default: K10
Range: K-32,768 to K32,767

Reference for reset to zero. When the weight
is within this range, the status code will be set
to “zero bit”, indicating the current zero
weight status.

Default: K-10
Range: K-32,768 to K32,767

Save the present set value and write all the
set values into the internal Flash for use next
time DVP02LC-SL is switched on.

H0: No action, Default
H’FFFF: Saving is successful
H’5678: Write to internal Flash
When H’5678 is written in, all set values will

be saved in Flash. When the saving is
completed, CR#41 will become H’FFFF. If the
value written in is not H’5678, it will
automatically return to H0, e.g. write K1 into
CR# to return to K0.

- 4 -

CR# Add. Attrib. Register name Explanation

#43 H102B X R/W CH1 filter percentage

#44 H102C X R/W CH2 filter percentage

#45 H102D X R/W

#46 H102E X R/W

#50 H1032 X R Status code

#51 H1033 X R Error code
#52 H1034 O R/W RS-232 node address

#53 H1035 O R/W
#54 H1036 O R/W RS-485 node address
#55 H1037 O R/W

Symbols: O means latched. X means not latched.

R means can read data. W means can write data.

c Error Code Table for CR#51:

bit Content Error bit Content Error

b0 K1 (H’0001)

b2 K4 (H’0004)

b4 K16 (H’0010)

b6 ~ b15 K64 (H’0040) Reserved

Note: Every error status is decided by its corresponding bit, so there might be more than

2 error statuses occurring at the same time. 0 refers to no error; 1 refers to error
occurring.

c Communication Format Table for CR#53, CR#55:

bit15 bit14~bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0

ACSII/RTU Reserved Baudrate

bit15 ACSII/RTU

bit7~bit4 Baudrate

bit3 Data length (RTU = 8 bits)
bit2 Stop bit

bit1~bit0 Parity

CH1 filter average
value

CH2 filter average
value

RS-232
communication
setting

RS-485
communication
setting

Power supply
abnormality

CH1 conversion
error

CH2 conversion
error

Default: K2
Range: K1 to K5 (Unit: 10%)

Display average weight after filtering.
Condition to enable filter: average time ≥ 30

b0 (H’0001): CH1 zero weight (empty)
b1 (H’0002): CH2 zero weight (empty)
b2 (H’0004): CH1 exceeds max. weight

(overload)
b3 (H’0008): CH2 exceeds max. weight

(overload)
b4 (H’0010): CH1 stable measured value
b5 (H’0020): CH2 stable measured value
b6 ~ b15: Reserved

Store all the error statuses. See “Error Code
Table” below. Default: H’0000

For CR#52, CR#54 default = 1
Range: K1 to K255
For CR#53, CR#55 default = H’0000; Range:

ASCII, 9600, 7, E, 1. See “Communication
Format Table” below.

b1 K2 (H’0002)

b3 K8 (H’0008)

b5 K32 (H’0020)

Data

Description

0 ASCII 1 RTU
0 9,600 bps 1 19,200 bps
2 38,400 bps 3 57,600 bps
4 115,200 bps 5 Else none
0 7 1 8
0 1 bit 1 2 bits
0 Even 1 Odd
2 None 3 None

- 5 -

length

Hardware
abnormality

CH1 SEN voltage
error

CH2 SEN voltage
error

Stop bit Parity