Flintec DAS 72.1 User Manual

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Process Indicator Type DAS 72.1 Mark III

MANUAL

Firmware Version 72.181.v.4.28 or higher

Hardware Version 72.101.5.v.3.0x

Document No G128 Rev6 GB

www.flintec.com

Manual DAS 72.1 Page 1

A GENERAL

A.1 INTRODUCTION AND SPECIFICATION

The model DAS 72.1 Mark III is a high precision, high speed digital amplifier for weighing and force measurements with strain gauge (SG) sensors. The device can be controlled either by the front keys or via RS 485 port. 3 Logic inputsand outputs makecomplex control functionseasy.The 3 logic outputs canbe controlled external too.

With the available as standard analogue output 4…20 mA the DAS 72.1 fulfills industrial requirements. The device features full multi-drop communications capability and can be programmed via a straightforward ASCII command set. The LDU xx.x series and the amplifier DAS 72.1 with on-board digital display, use the same command set. You can connect up to 32 SG amplifiers of either the LDU XX.X series or DAS 72.1 type onto a single RS485 bus.

The DAS 72.1 with its high precision 18-bit A to D converter and internal sample rate of up to 2400 measure ments / second, is particularly suitable for high dynamic measurements and control purposes.

DAS 72.1 Mark II / III Specifications

Linearity < 0.002 % Excitation 5 V DC, load cells 80-2000 Ohm, 6 wire technique Analogue input range ±3.2 mV/V (bipolar, for weighing applications and force measurements) Minimum input per vsi 0.05 μV/d Resolution Internal ±260000 counts, ±18-Bit-A/D convertor; display max. ±99999 counts Conversion rate Internal 2400 measurements per second; external up to 600 measurements per second Digital filter FIR Filter 2.5 ... 19.7 Hz or IIR Filter 0.25 ... 18 Hz; programmable in 8 steps each Calibration Software calibration and set up Computer interface RS485 or RS422, full duplex, 9600 ... 115200 Baud; bus capability up to 32 devices

(RS485) Weighing functions zero, gross, tare, net, filter etc. Analogue output 0/4...20 mA, 14-Bit resolution Display 10.2 mm LED, green, 5 digits, 3 status LED for nett/motion/sign,

6 status LED for logic inputs and outputs Logic inputs 3 opto-isolated inputs, 10 ... 30 V DC, max. 3.5 mA Logic outputs 3 opto-isolated outputs, < 45 V DC / AC, 1 A Temperature effects on zero 5 ppm/°K typ.; max. <10 ppm/°K

on span 4 ppm/°K typ.; max. <8 ppm/°K Temperature range –10 °C to +50 °C (operating); –20 °C to +60 °C (storage) Enclosure tinned steel enclosure, protection IP 40; for 35 mm DIN-rail mounting.

Special housing IP 65 on request. Dimensions 135 x 66 x 19 mm, weight ca. 180 g Power supply 11 ... 25 V DC ±10 %, < 3 W, galvanically isolated EMC CE 73/23/EEC; 93/98/EEC and 89/336/EEC

All dimensions in mm. Dimensions and specifications are subject to change without notice.

Page 2 Manual DAS 72.1

A.2 KEY FUNCTIONS

Tare Key

Puts unit into ‘Net’ mode.When inside ‘Set-up’ Menu this key moves the menu back one step. Also moves‘Digit Selected’ to the right inside sub menus.

Zero Key

Sets new zero (if enabled). Reverts to calibrated zero if the button is held down for more than 3 seconds. Switches unit back to ‘Gross’ mode if a tare has been set. Acts as the‘Enter’ key in the ‘Set-up’ Mode.

Down key

Recessed Enable Switch (Enables changes to be made to important parameters. Must be pressed before attempting to change parameters 1.1 to 1.3, 2.1 to 2.3 and 3.1 to 3.3)

No motion LED

Net mode LED

Logic input 1 2 3

Depress

Change

Net

Logic output

1.Zero

1.0/allow>0<

2.Calibrate

3.Set mV/V

Load cell 5Vdc 80mA Exc Sen Sig Sig Sen Exc Rx Rx Tx Tx

+++ +

2 3 4 5 6 7 8 9 10 111213

2.Span

1.Set cal. ´n´

2.Calibrate

3.Set mV/V

4.Disp.mV/V

--- -

123

3.Display

1.o/u limits´n´

2.Step * ´n´

3.Dec.point

4.Logic stats

0-20mA

Io Gnd

4.Filter

1.f Hz

cut

2.Algorithm

3.Update rate

Motion´n´

RS422/485CL out

to enter the set up mode

7.Outp. 1/2/3

1.SPoint ´n´

2.Hyst. ´n´

3.Base

4.Test

Isolated

Mark III

Isolated

Power 11 -25Vdc

SET UP

8.Datacom.

1.Baud rate

2.422/485

3.Address

4.Auto trnsm.

Digital Amplifier + Setpoint DAS 72.1

Inp.1 Inp.2

Isolated

6.Input 1/2/3

1.Assign key

4.Test

Logic Inputs

12 3com

5.CLout

1.4mA=´n´

2.20mA=´n´

3.Base

4.TestImA

Logic Outputs

12 3com

14 27

Press either key for

more than 3 seconds

Up key

261516 17 2324 25181920 2122

SHIELD

+ EXCITATION

+ SENSE

+SIGNAL

- SENSE

- SIGNAL

- EXCITATION

Receive -

Receive +

Ground

Transmit -

Transmit +

Logic Input 1 (+)

Logic Input 2 (+)

Logic Input 3 (+)

Commmon

“Set up”

menu structure

RS422/485

COM port

Logic

outputs

0 4-20mA

Load cell

connections

Manual DAS 72.1 Page 3

analogue

output

Logic

inputs

Input 1

Inp.1

(Functions as

Zero button, Tare off, Set zero, see paragraph B.3.6)

Power supply 12-25 V DC

Inp.2

Input 2 (Functions as

Tare button, Display net mode, see paragraph B.3.6)

B KEYBOARD SET UP

A GENERAL 2 A.1 INTRODUCTION AND SPECIFICATION 2 A.2 KEYFUNCTIONS 3 B KEYBOARDSET UP 4 B.1 SHORTMANUAL OF KEYBOARD SETUP 5 B.2 SETUPTABLE 6 B.3 SETUP FLOWCHARTS 7 B.3.1 Zeroset up,Menu 1.1 - 1.4 7 B.3.2 Spanset up,Menu 2.1 -2.4 8 B.3.3 Displayset up,Menu 3.1 - 3.4 9 B.3.4 Filter / no motion setup, Menu 4.1- 4.4 10 B.3.5 Analogueoutput set up, Menu 5.1- 5.4 11 B.3.6 Logicinput setup, Menu 6.1.3- 6.3.4 12 B.3.7 Logicoutput setup, Menu 7.1- 7.3 14 B.3.8 Datacommunication set up,menu 8.1 - 8.4 15 B.3.9 Errorcodes 16 B.4 EXAMPLES 17 B.4.1 Example1, calibration procedureusing weights 17 B.4.2 Example2, calibration procedureusing loadcell mV/V sensitivity and B.4.3 Example3, calibration procedureusing loadcell mV/V sensitivity 21 D CE KONFORMITÄTSERKLÄRUNG 57

zero offset 19

Page 4 Manual DAS 72.1

B.1 SHORT MANUAL OF KEYBOARD SETUP

9600...115,2 k Baud

1. Setup Baudrate:

Setup setpoints

for outputs 1/2/3

1.1

• (00) not used

1. External Key control :

output of 4 mA

1. Setup value for an

• (01) Zero

Example:

2. Setup Mode for Com.

1.2 Setup switch logic

• (02) Tare

0.0 (g) @ 4 mA

ports

for:

Valid addresses

0...255

Address "0" device is

always active on bus

Address enable via

• RS-422 full duplex

• RS-485 Network

•

"open"

3. Setup Port Address

•

Example:

2. Setup Hysteresis of

• (06) Get average

• (07) Display Peak

1000 (g) @ 20 mA

setpoints

• (08) Delete Peak

• (09) Display Hold

output:

3. Base of analogue

• (0) Gross

3. Base of Outputs:

• (10) Peak to Peak

• Gross value

• (1) Net

• (11) Display Valley

• Nett value

• (12) Key lock

• Average valuet

• on

• off

• (03) Move up

• (04) Move down

• (05) External trigger

output of 20 mA

2. Setup value for an

• (2) Peak

• (3) Average

• (13) Store Weight

• Hold valuet

4. Auto Transmit of

• (14) Tare and delete

• Peak to Peak valuet

data:

• (4) Hold

• Valley valuet

• Gross

• (5) Peak to Peak

• Display value

2. not used

• Net

• (6) Valley

• Swiched off

• All (Data string)

• (7) Error 4 or 5

3. not used

• Sap (A/D value)

• (8) Swiched of

• Aver (Average

4. Test of Logic inputs

output signal

4. Simulate an analogue

value)

• Pea (Peak value

• Hold (Hold value)

The display shows

the signal status of

logic outputs

4. Test of Logic outputs

The display shows

the signal status of

logic inputs

Setup 12.345 for

getting an output

current of 12,345 mA

value)

• Vall (Valley value)

• Pp (Peak to Peak

• Off (switched off)

Standard display is

switched off!

Standard display is

switched off!

Setup menu : To enter, press one of the arrow keys for 3 seconds. To change calibration data, also press recessed switch (to the left of the display) once.

1. ZERO 2. Span 3. Display 4. Filter 5. CL out 6. Input 1/2/3 7. Output 1/2/3 8. Data Com

1. 0 / allow >O< 1. Set cal.”n” 1. o/u limits ‘n’ 1. f-cut Hz 1. 4 mA=’n’ 1. Assign key 1. SPoint ‘n’ 1. Baud rate

2. Calibrate 2. Calibrate 2. Step*’n’ 2. Algorithm 2. 20 mA=’n’ 2. 2. Hyst +/- ‘n’ 2. 422/485

3. Set mV/V 3. Set mV/V 3. Dec.point 3. Update rates 3. Base 3. 3. Base 3. Address

4. Tare Memory 4. Disp. mV/V 4. Logic stats 4. Motion ‘n’ 4. Test I mA 4. Test 4. Test 4. Auto trnsm.

adjustable from

1=18Hzto

1. Cut off frequency

at which the display

shows an overload (o)

1. Measured value

actual measured

signal after 2.2 or

1. Calibration value for

Zero lock / unlock

1. Zero Tracking or Set

8 = 0.25 Hz

or an underload (u)

with internal mV/V

2. Calibrate Zero with

Typical setup:

signal after 2.3

should be displayed

actual or external

"4"=3 Hz

2. Display step size as

simulated input

signal changes

• FIR-Filter for quick

dampening

• IIR-Filter for high

2. Select Filter Type:

1, 2, 5, 10, 20 etc

point of the display

Example:

000.00 @ 100.00(g)

3. Position decimal

Example: 10 000 (g)

cell(s) connected or

will be simulated by a

simulator

This signal refers to

2. Input signal of load

signal

display "Zero” with

manual setup of

mV/V signal

3. Calibrate Zero to

This setup has

additional influence

•

on filters

3. Update rate

status

• No Status I/O

(approx 1,5 s)

• Short display of

for in motion band

(Tare, Zero and

Zero Tracking are

only allowed at

4.1 No Motion Range

4.2 Stabilisation time

I/O

• Permenant status

"No Motion")

4. Display I/O:

calibrate value of

setup 2.1

4.1 Tare "ON":= Tare

value stred

3. Input signal in mV/

non-volatile

Tare "OFF": Tare

setupwiththefront

panel keys

This signal refers to

calibrate value of

setup 2.1

1,6500 mV/V @ 1000

(g)

input signal in mV/V

For test purposes

4. Display of actual

value deleted at

power off

"ON" Load cells

connected with

Zener barriers

"OFF" Load cells

connected without

Zener barriers

4.2 EX-Modus

Manual DAS 72.1 Page 5

B.2 SETUP TABLE

Description

Function Zero key (on/off))

Zero Calibration / Weight Zero Calibration / mV/V

Span / Weight or mV/V

Span / Weight Span / mV/V

Displays Actual mV/V Signal

Maximum Display Value Maximum Display Value Display Step Size Decimal Point Position Display Status I/O

Cut Off Filter Frequency Filter Type

Update Rate per second (filtered) No Motion Range

Set Analogue Output @ 4 mA Set Analogue Output @ 20 mA Base of Analogue Output Simulate Analogue Output Signal

Input 1 for External Key Control Input 2 for External Key Control Input 3 for External Key Control Read Iinput Status Base of Digital Inputs Test Logic Inputs

Output Setpoint 1 Output Setpoint 2 Output Setpoint 3 Hysteresis & Logic Setpoint 1 Hysteresis & Logic Setpoint 2 Hysteresis & Logic Setpoint 2 Base Setpoint 1 Base Setpoint 2 Base Setpoint 3 Function Test Output 1 Function Test Output 2 Function Test Output 3

Baudrate RS-422/485 Port Port Mode (422 or 485) Device Address Com Port Auto Transmit Data

LED Display Pre Setup Example: 3000 kg scale

with 0.5 kg step

Menu Point Value Value Result

<1.1>

<1.2> <1.3> <2.1>

<2.2> <2.3>

<2.4> < 3.1.o > < 3.1.u >

<3.2>

<3.3>

<3.4>

<4.1>

<4.2>

<4.3>

<4.4>

<5.1>

<5.2>

<5.3>

<5.4> < 6.1.1 > < 6.2.1 > < 6.3.1 >

<6.2>

<6.3>

<6.4> < 7.1.1 > < 7.2.1 > < 7.3.1 > < 7.1.2 > < 7.2.2 > < 7.3.2 > < 7.1.3 > < 7.2.3 > < 7.3.3 > < 7.1.4 > < 7.2.4 > < 7.3.4 >

<8.1>

<8.2>

<8.3>

<8.4>

0-oFF

0.000

20000

0.000

2.000

99999

-9999 1 0 1

33.3 FIR

1 00000 20000

gross

-99999 00000

oFF

9600

422

oFF

0-oFF

0.000

0.400

a)3000.0 or

b)750.0

0.9

2.000

3100.0

-200.0 5

0.0 1

3.0

FIR

3 1

0.0

3000.0 gross

0000.0

1000.0

3000.0

0000.0

net net net

9600

422

nEt

Set zero not

possible

mV/V

Cal. with mV/V

Cal. with 750 kg

mV/V mV/V

-kg kg

0,5 kg

0000.0

Status for 1 s

for quick signal

changes

measurements/s

kg kg

gross

-kg kg kg kg kg kg

net net net

Baud

422-Port

Device No.

auto transmit

net weight

Page 6 Manual DAS 72.1

B.3 SET UP FLOWCHARTS

B.3.1 Zero set up, Menu 1.1 - 1.4

SET UP

Press the UP or DOWN key for more than 3 seconds to enter the Set-up Menu

Inp.1

Inp.2

Inp.1

Automatic Zero Tracking

Settings: 0 ... 255 d

Function is swiched off at setting 00 000. Zero Setting with zero key or by external signal is not possible (Menu 6).

Function is swiched on at setting 00 001 or higher, (max 00 255). Zero Setting with zero key or by external signal (Menu 6). Setting 00 001 sets a zero range of +/-2%ofUpper Display Limit (Menu 3.1), setting 00 002 up to 00 255 sets a range of2dupto255d(independant of decimal point setting).

Inp.2

Inp.1

CALIBRATE OR ADJUST THE ZERO POINT

(CONVENTIONAL WEIGHING SYSTEM)

Display shows the actual input signal in mV/V. Press the Enter key to store the zero.

Note: Recessed Enable Switch (Enables changes to be made to important parameters. Must be pressed before attempting to change parameters

1.1 to 1.3, 2.1 to 2.3 and 3.1 to 3.3)

Inp.1

Remark:

Inp.2

Inp.1

CALIBRATE THE ZERO POINT FROM THE LOAD CELL mV/V READING

scale should be unloaded.

Inp.1

Use the UP/DOWN & MOVE RIGHT keys to set the mV/V reading at which the unit should read zero.

Inp.2

Inp.1

Inp.2

Inp.1

Store Tare value, setting ON or OFF

Inp.1

OFF: Tare value deleted at power off ON: Tare value stored non-volatile (max. 1 000 000 times)

Inp.1

Inp.2

Inp.1

EX-Modus, setting ON or OFF

OFF:Load cell connection without Zener barrieres ON: Load cell connection with Zener barrieres,

extended error band for ERR 5

Inp.1

Manual DAS 72.1 Page 7

B.3.2 Span set up, Menu 2.1 - 2.4

Inp.1

Inp.2

Inp.1

SET THE SPAN CALIBRATION VALUE

Twopossibilities areavailable: A. Setthe displayvalue equivalent to thecalibration weight,continue withstep 2.2

B. Use the mV/Vsignal derivedfrom the load cell(s)test data,continue withstep 2.3.

Inp.1

Inp.2

Inp.1

CALIBRATE THE SPAN (CONVENTIONAL WEIGHING SYSTEM)

Display shows the actual input signal in mV/V. Apply test weights equivalent to the calibration value set in section 2.1. Press the Enter key to store the new span value.

Inp.1

Inp.2

Inp.1

CALIBRATE THE SPAN FROM THE LOAD CELL mV/V READING

Use the UP/DOWN & MOVE RIGHT keys to set the mV/V reading at which the unit should read the value set in section 2.1.

Inp.1

Inp.2

Inp.1

DISPLAY THE INPUT SIGNAL IN mV/V

This function allows you to view the input signal in mV/V.

Inp.1

Page 8 Manual DAS 72.1

B.3.3 Display set up, Menu 3.1 - 3.4

Inp.1

Inp.2

Inp.1

Inp.2

Inp.1

SET THE DISPLAY OVER RANGE LIMIT

(MAXIMUM VALUE +99 999)

Use the and keys to set the maximum display value

Inp.2

above which the display shows over range (all dashes in the top of the display).

Inp.1

SET THE DISPLAY UNDER RANGE LIMIT

(MINIMUM VALUE -99 999)

Use the and keys to set the minimum display value

Inp.2

below which the display shows under range (all dashes in the bottom of the display).

Inp.1

Inp.2

Inp.1

SET THE DISPLAY DIVISION OR STEP SIZE

(1, 2, 5, 10, 20, 50, 100, 200, 500)

Use the and keys to set the required display division or step size.

Inp.1

SET THE DECIMAL POINT POSITION ON THE DISPLAY (0, 0.0, 0.00, 0.000, 0.0000)

Use the and keys to set the required decimal point position on the

Inp.2

Inp.1

display.

Inp.1

Inp.2

Inp.1

3.4.0

LOGIC I-O STATUS

Select setting 0, 1 or 2 with and .

Inp.2

Setting 0 = Continious indication of Weight, no input/output status. Setting 1 = Indication of Weight, short indication input/output status (ca. 1,5 sec)

3.4.1

Setting 2 = Continious indication of input/output status.

3.4.2

Inp.1

Manual DAS 72.1 Page 9

B.3.4 Filter / no motion set up, Menu 4.1 - 4.4

Inp.1

Inp.2

Inp.1

4.1.0 : : :

4.1.8

Inp.1

4.3.0 : : :

4.3.7

Inp.1

Set the low pass filter cut off frequency

Set Range: 0 - 8 with Filter setting 18 Hz (4.1.1) to 0.25 Hz (4.1.8) with Filter type IIR. Filter setting 19.7 Hz (4.1.1) to 2.5 Hz (4.1.8) with Filter type FIR.

Attention

See Paragraph C.4.5 for more information.

Set the type of low pass filter required

: FIR or IIR

Setting with

Type IIR should be used where heavy damping is required. Type FIR should be used where high speed is required.

Defines the number of filtered readings averaged

Set Range: 0-7mit This Parameter defines the number of Readings from the IIR or FIR filter that will be averaged. Selection between “0” (1 Reading) and “7” (128 Readings).

Attention:

: Setting

“0” (4.1.0) deactivates the Filter.

See Paragraph C.4.5 for more information.

Inp.1

Inp.2

Inp.1

Set the No Motion Range

Set Range: 0 - 30 000 steps and

Inp.2

Fluctuations in weight values inside this range will be considered as ‘stable’.

Attention:

See also 4.4.2 for the Stabilisation Time If the condition of the No Motion Range is fullfilled within the Stabilistion Time the “No Motion” status bit will be set to allow zero setting, taring as well as calibrating zero and span.

Inp.1

Set the Stabilisation Time

Set Range: 0 - 30 000 mS with and

Inp.2

Sets the Stabilisation Time in milliseconds within which the weight value displayed has to remain within the No Motion Range, for the weigh to be considered ‘stable’.

Inp.1

Page 10 Manual DAS 72.1

B.3.5 Analogue output set up, Menu 5.1 - 5.4

Inp.1

Inp.2

Inp.1

Set the weight value at which 4 mA is send

Setting with and

Inp.2

Set the weight value at which 4 mA is send.

Examples:

Weighing range 3 000 kg and 3 000 d with 0/4...20 mA.

Analogue output 4...20 mA: for 0 kg=4mAmake setting 00 000. Analogue output 0...20 mA: for 600 kg=4mAmake setting 00 600.

Inp.1

Inp.2

Inp.1

Set the weight value at which 20 mA is send

Setting with and

Inp.2

Set the weight value at which 20 mA is send.

Examples:

Weighing range 3 000 kg and 3 000 d with 0/4...20 mA.

Analogue output 4...20 mA: for 3 000 kg = 20 mA make seting 03 000. Analogue output 0...20 mA: for 3 000 kg = 20 mA make seting 03 000.

Inp.2

Inp.1

Set the analogue output base

Setting with and for the following values:

GROS Gross NET Net PEA Peak AVER Average HOLD Hold PP Peak÷Peak VALL Valley DISP Display OFF OFF

= Analogue output follows value = Analogue output follows value = Analogue output follows value (maximum) = Analogue output follows value = Analogue output follows value = Analogue output follows value = Analogue output follows value (minimum) = Analogue output follows value = Analogue output is switched

Inp.2

Inp.1

Inp.2

Inp.1

Test the current output

Set Range 0...20 mA with . And

Inp.2

Set a current value in mA, which will be sent down the analogue output, independent of the load applied to the weighing system.

Inp.1

Manual DAS 72.1 Page 11

B.3.6 Logic input set up, Menu 6.1.3 - 6.3.4

The second digit coresponds with the input number

Set the function for Logic Input “1”

Possible settings: 00, 01 ,02 ,03 ,04 ,05 ,06 ,07, 08, 09, 10, 11, 12, 13, 14.

Fortsetzung nächste Seite

Input “1” no function

Input “1” acts as Zero button

Input “1” acts as Tare button

Input “1” acts as Up arrow button

Input “1” acts as Down arrow button

Input “1” starts the Trigger function

Input “1” displays the Average value

Input “1” displays the Peak value (maximum)

Input “1” deletes the Peak value

Input “1” displays the Hold value

Input “1” displays the Peak to Peak value

Input “1” displays the Valley value (minimum)

Input “1” disables the keyboard

Input “1” stores the actual weight (Hold value)

Input “1” tares the display and deletes all other values like 6.1.1.08

Page 12 Manual DAS 72.1

Logic input set up, Menu 6.1.3 - 6.3.4 (continued)

No function

Check Logic Input “1”

(6.1.1. must be set to “0” => 6.1.1.0)

“In1 0.” Input is ”low”

“In1 1.” Input is ”high”

As per section 6.1 but for Logic Input “2”

As per section 6.1 but for Logic Input “3”

Manual DAS 72.1 Page 13

B.3.7 Logic output set up, Menu 7.1 - 7.3

The second digit coresponds with the output number

Set the function for Logic Output “1”

Set weight value at which Logic

Output “1” switches

Permitted values +/- 99 999

Set whether Logic Output “1”

switches ON or OFF

Use the UP/DOWN keys to set whether logic output 1 switches ON or OFF at the

Set the hysteresis value on the setpoint for

Logic Output “1”

Permitted values +/- 99 999.

Set base for Logic Output “1”

As per section 7.1 but for Logic Output “2”

GROS Gross NET Net PEA Peak AVER Average HOLD Hold PP Peak to Peak VALL Valley ERR Error OFF OFF

Check Logic Output “1”

Use the UP/DOWN keys to switch.

= value = value = value (maximum) = value = value = value = value (minimum) = 4 or 5 = Sets output

The output is “off”.

The output is “on”.

out 1

com

As per section 7.1 but for Logic Output “3”

Page 14 Manual DAS 72.1

B.3.8 Data communication set up, menu 8.1 - 8.4

Inp.1

Inp.2

Inp.1

Set the Baud Rate for COMPORT (RS-422/485)

Setting with and

Inp.2

9 600 Baud 19 200 Baud 38 400 Baud 57 600 Baud

115 200 Baud

Inp.1

Inp.2

Inp.1

Select either RS-422 or RS-485

Setting with and

Inp.2

422 = RS-422-Interface (use for single DAS application) 485 = RS-485-Interface (use for multiple DAS application in BUS)

Inp.1

Inp.2

Inp.1

Set the Device Address Comport (RS-422/485)

Setting with and

Inp.2

Set the device address for multi-drop to 001 ... 255. Set to 000 for single point to point applications.

Inp.1

Inp.2

Inp.1

Select the Autotransmit Mode Setting with

GROS NET ALL SAP AVER PEA HOLD VALL PP OFF

= Gross value = Net value = Data string with Gross, Net and Status = A/D value = Average value = Peak value (maximum) = Hold value = Valley value (minimum) = Peak to Peak value = Autotransmit OFF

Inp.1

Manual DAS 72.1 Page 15

B.3.9 Error codes

The zero key is not enabled (See menu 1.1)

Set final zero out of range. (You are trying to set a zero which is greater than ±2% of the Upper Display Limit)

Excessive sensitivity requested. (The input signal is being divided into too many divisions i.e the size of each division is < 0.5 V)m

The input signal is in excess of ± 2.6 mV/V

Faulty load cell connection (Open circuit / Short Circuit / Wire disconnected)

You are trying to enter a value which is not valid (Outside the acceptable parameter range)

Display overload (Display value exceeds the upper limit set in Menu 3.1.o)

Display underload (Display value is more negative than the lower limit set in Menu 3.1.U)

The Zero or Tare motion limit has been exceeded. Set Zero or Tare function disallowed. Review Zero and Tare motion limits set in menu 4.4

Remark

If you need to return the DAS72.1 Mark III to the factory settings simply press and hold the recessed enable switch whilst powering up the unit. All parameters will then revert to the factory settings

Page 16 Manual DAS 72.1

B.4 EXAMPLES

B.4.1 Example 1, calibration procedure using weights

3 Leg tank or silo fitted with 3 off 1000 kg @ 2 mV/V load cells.

Dead load 600 kg. Live range 2000 kg in 0.5 kg steps.

It is assumed that the load cell system is connected to the DAS72.1 and the power is on. The maximum and minimum display values, display increment size and decimal point position should be defined prior to carrying out the calibration (See Menu 3). For this example the display maximum is defined as 2100.0, the display minimum is

-200.0, the display step size is 0.5 kg.

Remember that all parameters under sections 1.1 - 1.3, 2.1 - 2.3 and 3.1 - 3.3 can only be accessed or changed after the Recessed Enable Switch has been pressed.

Go to Menu 1.2 and using the UP/DOWN and RIGHT keys set the display to read 0000.0. Make sure that the

weighing system is empty or at the point where you want the display to read zero. Press the 0 [Enter] key. This defines the actual zero calibration point.

Go to Menu 2.1 and using the UP/DOWN and RIGHT keys set the display to read the value of the calibration weight(s) applied. For this example if the calibration load applied is 750 kg set the display to read 750.0. Press the 0 [Enter] key. This defines the calibration weight.

Go to Menu 2.2.Apply the calibration weight(s) to the weighing system. Press the 0 [Enter] key. The display will show the actual input signal in mV/V. Press the 0 [Enter] key. This defines the actual span calibration point.The displaywill show 2.2. Press the rightarrow keytwice and the DAS willbe back in weighing mode.

Calibration is now completed.

Manual DAS 72.1 Page 17

Flowchart Example 1

Enter the

Set-up menu

Set the decimal

point position

Set the

display

step size

Set the Display

Upper Limit

(Overload)

Set the Display

Lower Limit

SET UP

1. Press the UP or DOWN key for more than 3 seconds to enter the Set-up Menu

2. Press the recessed enable switch

SET THE DECIMAL POINT POSITION (0, 0.0, 0.00, 0.000, 0.0000) Use the UP or DOWN key to set the required decimal point position. Choose 0.0

SET THE DISPLAY STEP SIZE. (1, 2, 5, 10, 20, 50, 100, 200, 500) Use the UP or DOWN key to set the required display step size.

SET THE DISPLAY OVER RANGE LIMIT. (MAX. VALUE +99999) Use the UP/DOWN & MOVE RIGHT keys to set the maximum display value above which the display shows over range (all dashes in the top of the display).

SET THE DISPLAY UNDER RANGE LIMIT. (MIN. VALUE -99999) Use the UP/DOWN & MOVE RIGHT keys to set the minimum display value below which the display shows under range (all dashes in the bottom of the display).

Calibrate the

Zero point

Set the Display value

equal to the

Calibration weight

Calibrate

the Span

Calibration

completed

CALIBRATE THE ZERO POINT. (CONVENTIONAL WEIGHING SYSTEM) Display shows the actual input signal in mV/V.

SET THE SPAN CALIBRATION VALUE. Use the UP/DOWN & MOVE RIGHT keys to set the display value equivalent to the calibration weight, e.g. 750 kg.

CALIBRATE THE SPAN. (CONVENTIONAL WEIGHING SYSTEM) Display shows the actual input signal in mV/V. Apply test weights equivalent to the calibration value set in section 2.1. Press the Enter key to store the new Span value

Note:

Choose Filter type IIR (menu 4.2), Low Pass Filter 6 ... 8 (menu 4.1) and wait for ‘No Motion’ in the calibration routine.

Page 18 Manual DAS 72.1

B.4.2 Example 2, calibration procedure using load cell mV/V sensitivity and zero offset

3 Leg tank or silo fitted with 3 off 1000 kg @ 2mV/V load cells

Dead load 600 kg. Live range 2000 kg in 0.5 kg steps.

-200.0, the display step size is 0.5 kg.

Remember that allparameters undersections 1.1 - 1.3, 2.1 - 2.3 and3.1 -3.3 can only be accessed or changed after the Recessed Enable Switch has been pressed.

Go to Menu 1.3. and using the UP/DOWN and RIGHT keys to set the zero point of the 3 load cells to 0.0000

mV/V. Press the 0 [Enter] key. This defines the theoretical zero calibration.

Go to Menu 2.1 and using the UP/DOWN and RIGHT keys set the display to read the capacity of the load cell system or the weight value at which the sensitivity is known. For this example the load cell capacity is 3 x 1000 kg = 3000 kg @ 2 mV/V. Set the display to read 3000.0. Press the 0 [Enter] key. This defines the theoretical calibration weight (equivalent to 2mV/V in this example).

Go to Menu 2.3. Press the 0 [Enter] key. Use the UP/DOWN and RIGHT keys set the display to read the mV/V sensitivity of the load cell system you are using.For this example the load cell sensitivity or Output at Rated Load is 2.000 mV/V. In multiple load cell installations (load cells wired in parallel) the sensitivity is the average of all the load cells connected. Press the 0 [Enter] key. This defines the theoretical span calibration point.

If required the zero can be re-calibrated without affecting the span. To do this make sure that the weighing system is empty or at the point where you want the display to read zero. Goto Menu 1.2. Press the 0 [Enter] key. The display shows the actual input signal in mV/V. Press the 0 [Enter] key. Press the right arrow key twice and the DAS will be back in weighting mode.

Calibration is now completed.

Manual DAS 72.1 Page 19

Flowchart Example 2

Enter the

Set-up menu

Set the decimal

point position

Set the

display

step size

Set the Display

Upper Limit

(Overload)

Set the Display

Lower Limit

Set Zero of load cells

mV/V sensitivity

for Zero point

SET UP

1. Press the UP or DOWN key for more than 3 seconds to enter the Set-up Menu

2. Press the recessed enable switch

SET THE DECIMAL POINT POSITION (0, 0.0, 0.00, 0.000, 0.0000) Use the UP or DOWN key to set the required decimal point position. Choose 0.0

SET THE DISPLAY STEP SIZE. (1, 2, 5, 10, 20, 50, 100, 200, 500) Use the UP or DOWN key to set the required display step size. Choose 5 = 0,5 kg display resolution

CALIBRATE THE ZERO POINT IN mV/V. Use the UP/DOWN & MOVE RIGHT keys to set the load cell summary mV/V value, e.g. 0.000 mV/V. Choose 0.0000 for Zero Point of Scale

Set the Display value

equal to

mV/V sensitivity

Set mV/V equivalent

Span Calibration Value

Set Zero point

Shift for Display

gross or net

Calibration

completed

SET THE SPAN CALIBRATION VALUE. Use the UP/DOWN & MOVE RIGHT keys to set the display value equivalent to the load cell summary nominal load, e.g. 3000 kg. Choose 3000.0 for load cell summary nominal load 3000 kg

CALIBRATE THE SPAN FROM mV/V LOAD CELL SENSITIVITIES Use the UP/DOWN & MOVE RIGHT keys to set the mV/V reading equivalent to the span calibration value set in section 2.1. Choose 2.0000 Sensitivity for summary nominal load 3000 kg

Note:

Choose Filter type IIR (menu 4.2), Low Pass Filter 6 ... 8 (menu 4.1) and wait for ‘No Motion’ in the calibration routine.

SHIFT ZERO POINT of empty Silo. Display reading is the actual mV/V value. Set the new Zero Point by pressing the ENTER key. Choose the Zero Shift to display gross (Silo weight) and net weight

Page 20 Manual DAS 72.1

B.4.3 Example 3, calibration procedure using load cell mV/V sensitivity

3 Leg tank or silo fitted with 3 off 1000 kg @ 2 mV/V load cells.

Dead load 600 kg. Live range 2000 kg in 0.5 kg steps.

It is assumed that the load cell system is connected to the DAS 72.1 and the power is on. The maximum and minimum display values, display increment size and decimal point position should be defined prior to carrying out the calibration (See Menu 3). For this example the display maximum is defined as 2100.0, the display minimum is

-200.0, the display step size is 0.5 kg.

Remember that allparameters undersections 1.1 - 1.3, 2.1 - 2.3 and3.1 -3.3 can only be accessed or changed after the Recessed Enable Switch has been pressed.

Situation: The silo is partly filled, a zero point shift (menu 1.2) is not possible. Tare of the silo and load cell

sensitivity are known. Example:Tare is600 kg,load cellsensitivity is 2.0000mV/V.In this casewe have to usealso 2.0000 mV/V for 3000 kg. This means at tare the signal is 0.4000 mV/V. Go to Menu 1.3.using the UP/DOWN and RIGHT keysto set the zero pointof the 3 load cells to 0.4000mV/V.

Calibration is now completed.

Manual DAS 72.1 Page 21

Flowchart Example 3

Enter the

Set-up menu

Set the decimal

point position

Set the

display

step size

Set the Display

Upper Limit

(Overload)

Set the Display

Lower Limit

SET UP

1. Press the UP or DOWN key for more than 3 seconds to enter the Set-up Menu

2. Press the recessed enable switch

SET THE DECIMAL POINT POSITION (0, 0.0, 0.00, 0.000, 0.0000) Use the UP or DOWN key to set the required decimal point position. Choose 0.0

SET THE DISPLAY STEP SIZE. (1, 2, 5, 10, 20, 50, 100, 200, 500) Use the UP or DOWN key to set the required display step size.

Calibrate the

Zero point

Set the Display value

equal to

mV/V sensitivity

Set mV/V equivalent

Span Calibration Value

Calibration

completed

CALIBRATE THE ZERO POINT IN mV/V. Use the UP/DOWN & MOVE RIGHT keys to set the load cell summary mV/V value, e.g. 0.000 mV/V.

SET THE SPAN CALIBRATION VALUE. Use the UP/DOWN & MOVE RIGHT keys to set the display value equivalent to the load cell summary nominal load, e.g. 3,000 kg. Choose 3000.0 for load cell summary nominal load 3000 kg

Note:

Choose Filter type IIR (menu 4.2), Low Pass Filter 6 ... 8 (menu 4.1) and wait for ‘No Motion’ in the calibration routine.

Page 22 Manual DAS 72.1

C SETUP VIA SERIAL PORT

C SETUP VIASERIAL PORT 23 C.1 COMMUNICATIONS& GETTING STARTED 24 C.1.1 Serial interface 24 C.1.2 Command Language 24 C.1.3 Setup baud rate/ deviceaddress 25 C.1.4 Getting Started 25 C.2 WIRING DIAGRAM 26 C.3 COMMANDS SUMMARY 27 C.4 COMMANDS 29 C.5 CALIBRATIONPROCEDURE. 54 C.6 USE IN “APPROVED”APPLICATIONS(only as information) 55 C.7 SOFTWARE (FIRMWARE) DOWNLOAD 56

Manual DAS 72.1 Page 23

C.1 COMMUNICATIONS & GETTING STARTED

C.1.1 Serial interface

Communicating with the DAS 72.1 digitizer is carried out via the RS422/RS485 port.

The data format is the familiar 8/N/1 structure (8 data bits, no parity, 1 stop bit).

Available baud rates via the RS422/RS485 port are as follows:

9.600, 19.200, 38.400, 57.600 or 115.200 baud.

RS422

Connection using a 4 wire technique.

•

Point-to-Point connection, i.e. no bus communication possible.

•

Half duplex setup (DX=0).

•

RS485

Connection using 2- or 4-wire techniques.

•

Multi-drop connection possible, up to 32 DAS 72.1.

•

Half or Full Duplex (DX=0 or DX=1) possible.

•

(RS232)

Select a RS485/RS232 converter.

•

C.1.2 Command Language

The command set of the DAS 72.1 series is based on a simple ASCII format (2 capital letters). This enables the user to setup the device, get results or check parameters.

Example:

DAS 72.1 with the address or channel number 1 is connected via the RS 485 port to a bus system. You want to get the net weight.

In this manual “_“ means space & “¿“ means enter (CR/LF)

Master (PC / PLC) sends Slave (DAS 72.1) responds Status

OP_1¿

GN¿

N+123.45

open device #1

device #1 ready

get Net weigh

Net weight with algebraic

sign / comma

The command OP_2 opens the communication channel to DAS 72.1 device #2. Now device #2 acknowledges that it is active and responds to any commands on the bus. Communication with device #2 will be closed by another OP command (for another device on the bus e.g. OP_5) or by the command CL_2.

Each OP_X command implies a CL command to all other devices on the bus except device #X. This makes the address structures easier and the system performance improves.

Page 24 Manual DAS 72.1

C.1.3 Setup baud rate / device address

Baud rate

Factory default: 9600 baud

Address settings

It is possible to set the network address of the device using the AD command. (Address range between 0 and 255). Setting the device address to 0 will set the continuously active mode, where the device becomes permanently active, and will listen and respond to any command on the bus, without the need for an OP xxx command.

Factory default: Address 0

C.1.4 Getting Started

You will require a:

PC or PLC with either a RS422 or RS485 communication port.

•

If using a PC/PLC with RS232 port, an RS422/485 to RS232 converter will be required.

•

Interconnecting cabling - confirm that all relevant pins used – See the wiring diagram at the end of this

•

section. A load cell / scale with test weights or a load cell simulator.

•

A 12-25 V DC power supply capable of delivering approximately 150 mA for each DAS 72.1 and load cell.

•

One or more DAS 72.1.

•

• A suitable ASCII communication software *.

Refer to the wiring diagram on page 26.

* You can easily communicate between a PC and a DAS 72.1 using programs such as Procomm, Telemate, Kermit or HyperTerminal (included in Windows).

Also, the DOP software with graphical user interface and oscilloscope function is now available on request (Windows 98/2000/XP).

Manual DAS 72.1 Page 25

C.2 WIRING DIAGRAM

Logic input 1 2 3

Depress

Change

Net

Logic output

1.Zero

1.0/allow>0<

2.Calibrate

3.Set mV/V

Load cell 5Vdc 80mA Exc Sen Inp Inp Sen Exc Rx Rx Tx Tx

+++ +

2 3 4 5 6 7 8 9 10 1112 13

SHIELD

2.Span

1.Set cal. ´n´

2.Calibrate

3.Set mV/V

4.Disp.mV/V

--- -

+ SENSE

- SIGNAL

+ SIGNAL

+ EXCITATION

123

3.Display

1.o/u limits´n´

2.Step * ´n´

3.Dec.point

4.Logic stats

0-20mA

Io Gnd

Relaisausgang 2 aktiv

- SENSE

- EXCITATION

RS422/485CL out

Receive +

4.Filter

1.f Hz

cut

2.Algorithm

3.Update rate

Motion´n´

Receive -

Transmit -

Transmit +

7.Outp. 1/2/3

1.SPoint ´n´

2.Hyst. ´n´

3.Base

4.Test

Isolated

Mark III

Isolated

Power 11 -25Vdc

SET UP

8.Datacom.

1.Baud rate

2.422/485

3.Address

4.Auto trnsm.

Digital Amplifier + Setpoint DAS 72.1

Inp.1 Inp.2

Isolated

6.Input 1/2/3

1.Assign key

4.Test

Logic Inputs

12 3com

5.CLout

1.4mA=´n´

2.20mA=´n´

3.Base

4.TestImA

Logic Outputs

12 3com

14 27

Ground

Commmon

Logic input 3 (+)

Logic input 1 (+)

Logic input 2 (+)

261516 17 232425181920 2122

Load cell

connections

4-20mA analogue output

RS422/485

COM port

Logic

outputs

Logic

inputs

Input 1

Inp.1

(Functions as

Zero button, Tare off, Set zero, see description)

Attention:

For load cells with 4-wire connection “Exc +” / “Sen +” and “Exc -” / “Sen -” should be shortened.

+ Excitation

+ Signal

– Excitation – Signal

Shield

(green)

(white)

(black) (red) (yellow)

Flintec load cell; 4-wire

Flintec load cell; 6-wire

+ Excitation + Sense

+ Signal

– Sense – Excitation

– Signal

Shield

Power supply 12-25 V DC

Inp.2

Output 2 (Funktions as

Tare button, Display net mode, see description)

(green) (blue)

(white)

(brown) (black)

(red) (yellow)

Page 26 Manual DAS 72.1

C.3 COMMANDS SUMMARY

Get/set analog action Analog action 0 through 8 A+00000/OK/ERR

Network address Read/modify Network address 0 through 255 A:014/OK/ERR

Absolute gain calibrate (TAC protected) Cailbrate gain using absolute sensitivity in mV/V (without dp) +/-32000; 0 through 99999 G+2.0000/OK/ERR

Get/set analog high Analog calibration point 20 mA (high) -99999 through 9999 H+10000/OK/ERR

Action input n Function of logic input 1, 2 or 3 0 through 14 In:+00006

Get/set analog low Analog calibration point 4 mA (low) -99999 through 99999 L+00000/OK/ERR

Get/set setpoint n action Setpoint action 1, 2 or 3 0 through 8 An:+00000/OK/ERR

Save analog output parameters Save AL, AH, AA to EEPROM none OK/ERRAZAbsolute zero calibrate (TAC protected) Calbrate zero using absolute zero in mV/V (without decimal point) -32000 through 32000 Z+0.000/OK/ERR

Baudrate Read/modify baudrate setting 9600 through 115200 B 9600CECalibrate enable Open legal parameters (CE 'TAC') 0 through 65535 E+00001/OK/ERR

Calibrate gain (TAC protected) Calibrate gain at some load >> zero 0 through 99999 G+20000/OK/ERR

Calibrate min (TAC protected) Read/modify min 0 through -99999 I+09000/OK/ERR

Close all connections Close all devices (OP XXX implies CL) none noneCMCalibrate max (TAC protected) Read/modify max 0 through 99999 M+30000/OK/ERR

Calibrate save (TAC protected) Save CM, CZ, AZ, CG, AG, DS, DP, ZT to EEPROM none OK/ERCZCalibrate zero (TAC protected) Calibrate zero - no load on platform none OK/ERDPDecimal point (TAC protected) Read/modify decimal point position 0 through 5 P+00005/OK/ERR

Command Short Description Usage Parameter Values Typical Answer

AIn

Manual DAS 72.1 Page 27

Display step size (TAC protected) Read/modify the display step size 1, 2.5, 10, 20, 50, 100, 200, 500 S+00001/OK/ERR

Duplex Select half (0) or full (1) duplex 0 oder 1 X+000/OK/ERR

Factory default (TAC protected) Load factory defaults into EEPROM none OK/ERFLFilter setting Read/modify filter setting 0 through 8 F+00008/OK/ERR

Filter mode Read/modify filter mode setting 0 oder 1 M+00001/OK/ERR

Get Average weight Returns the current average value none A+00000

Get Gross value Returns the gross value none G+01100GHGet Hold value Returns the hold value none H+01000/OK/ERR

Get Peak value (maximum) Returns the peak value none M+00100GNGet Net value Returns the net value none N+00000GOGet Peak to Peak value Returns the Peak to Peak value none O+01000/OK/ERR

Get sample Returns the A/D value none S+000000

Get Tare value Returns the tare value none T+00000GVGet Valley value (minimum) Returns the valley value none V+01000/OK/ERR

Get long Weight information Get long weight information none W+00100+01100010F

Get/set setpoint n hysteresis Setpoint hysteresis 1, 2 or 3 -99999 through 99999 Hn:+00000/OK/ERR

Inform. device ID Information - device identification none D:7210INRead input status Read input status none IN:0011IORead/Modify output status Read/Modify output status 0000 through 0111 IO:0011ISInform. on device status Information - no motion, zero and tare status none S:000000IVInform. version number Information - software version number none V:0428LIList settings Information - list settings as ASCII lines none List of settingsMTMeasuring Time The time over which the average value is derived 0 through 500 ms M+00100/OK/ERR

Command Short Description Usage Parameter Values Typical Answer

No-motion range No-motion range 0 through 65535 R+00010/OK/ERR

No-motion time No-motion time in milliseconds 0 through 65535 T+00500/OK/ERR

Output mask Disable setpoint outputs 0000 through 0111 OM:0000/OK/ERR

Open connection Open device XXX 0 through 255 O:O02/OK

Get/set logic setpoint / hysteresis Logic hysteresis 1, 2 or 3 0 oder 1 Pn:+00000/OK/ERR

Reset peak weight value Clears the current peak weight value to zero none OK/ERRRTReset tare Restores current zero point none OK/ERRRZReset system zero Restores the calibration zero point none OK/ERRSDStart Delay Start delay between trigger and start of measurement 0 through 500 ms S+00100/OK/ERR

Start auto-transmit gross Start auto-transmitting gross value none G+01100/OK/ERR

Auto-transmit hold value Start auto-transmitting hold value none H+01000/OK/ERR

Auto-transmit peak weight value Start auto-transmitting peak value none M+00100/OK/ERR

Start auto-transmit net Start auto-transmitting net value none N+00000/OK/ERR

Auto-transmit peak to peak value Start auto-transmitting peak to peak value none O+01000/OK/ERR

Get/set setpoint n Setpoint 1, 2 or 3 -99999 through 99999 Sn:+00000/OK/ERR

Software reset Restart the DAS none OKSSSave setpoint parameters Save S1, S2, S3, H1, H2, H3, A1, A2, A3 to EEPROM none OK/ERRSTSet tare Set tare point none OK/ERRSVAuto-transmit valley value Start auto-transmitting valley value none V+01000/OK/ERR

Start auto-transmit weight Start auto-transmitting long weight result none W+0750+750061F4

Set system zero Set system zero point none OK/ERRTETrigger Edge Selects trigger on a falling (0) or rising (1) edge 0 oder 1 E:000/OK/ERR

Software-Hold Store hold value none OK/ERRTLTrigger Level Set value of the rising or falling trigger edge 0 through 99999 T+00100/OK/ERR

Trigger Software trigger to start measuring cycle none OK/ERRURUpdate rate Read/modify update rate setting 0 through 7 U+00000/OK/ERR

Save set-up parameters Save FL, FM, UR, NR, NT, AD, BR, DX to EEPROM none OK/ERRZTZerotrack (TAC protected) Zerotrack off (0) or zerotrack on (1) 0 bis 255 Z:001/OK/ERR

Page 28 Manual DAS 72.1

C.4 COMMANDS

For better clarity, all commands are divided into groups as described on the following pages.

C.4.1 System diagnosis Commands – ID,IV,IS,SR 30 C.4.2 Set up Commands– SD,MT,GA,TE, TR, TL, AI 31 C.4.3 Calibration Commands – CE, CI,CM,DS,DP,CZ,CG, AZ, AG, ZT, FD,CS 33 C.4.4 Motion detection Commands – NR,NT 37 C.4.5 Filter setting Commands – FM, FL, UR 38 C.4.6 Set Zero/Tareand Reset Zero/Tare Commands –SZ, RZ, ST, RT 40 C.4.7 Output Commands – GG,GN, GT,GS,GM, RM, GH, GO,GV,GW 42 C.4.8 Auto-transmit Commands –SG, SN, SW, SM, SH,SO,SV 44 C.4.9 Commands for externalI/O control– IN,IO,OM, AI 46 C.4.10 Setpoint Commands- Sn,Hn,Pn,An 48 C.4.11 Communication setup Commands – AD, CL, BR, DX,OP, LI 50 C.4.12 Commands Analogue Output 4 – 20 mA- AL, AH, AA 52 C.4.13 Save parameters Commands –CS, WP, SS, AS, TH 53

Manual DAS 72.1 Page 29

C.4.1 System diagnosis Commands – ID, IV, IS, SR

Use these commands you get the DAS 72.1 type, firmware version or device status. These commands are sent without parameters.

ID Request of device identify

Master ( PC / PLC ) sends DAS 72.1 responds

D:7210

The response to this request gives the actual identity of the active device. This is particularly useful when trying to identify different device types on a bus.

IV Request of firmware version

Master ( PC / PLC ) sends DAS 72.1 responds

V:0210

The response to this request gives the firmware version of the active device.

IS Request device status

Master ( PC / PLC ) sends DAS 72.1 responds

IS¿

S:067000

The response to this request comprises of two 3-digit decimal values, which can be decoded according to the table below:

Leftmost 3-digit value : R ightmost 3-digit value:

1 Signal stable 1 (not used) 2 Zero action performed 2 (not used) 4 Tare active 4 (not used) 8 (not used) 8 (not used) 16 (not used) 16 (not used) 32 Output 1 active 32 (not used) 64 Output 2 active 64 (not used) 128 Output 3 active 128 (not used)

The example decodes the result S:067000 (binary 01000011) as follows:

Signal stable (no-motion) [2 Zero action [2 Output 2 active [2

= 1, LSB ]

=2]

=64]

Note: the bits that are not used are set to zero.

SR Reset DAS 72.1 firmware

Master ( PC / PLC ) sends DAS 72.1 responds

SR¿

This command will respond with ‘OK’ and after maximum 400 ms perform a complete reset of the DAS

72.1. It has the same functionality as power off and on again.

Page 30 Manual DAS 72.1

C.4.2 Set up Commands – SD, MT, GA, TE, TR, TL, AI

Note: All setups should be stored with the WP command before power off.

SD Start Delay 0 … 500 ms

Set the delay between falling/rising edge of trigger pulse and start of measurement. Permitted values are 0 … 500 ms.

Master ( PC / PLC ) sends DAS 72.1 responds Result

SD¿

SD_200¿

S+00100

Request: SD=100 ms

Setting: SD=200 ms

Factory default: 0 [= 0 ms]

See time diagram of check weighing page 32

MT Measuring Time, range 0…500 milliseconds

Set the time over which the average value will be built. Permitted values are 0 … 500 ms.

Master ( PC / PLC ) sends DAS 72.1 responds Result

MT¿

MT_500

M+00100

Request: MT=100 ms

Setting: MT=500 ms

Note: MT = 0 means disabled trigger and average function.

Factory default: 0

See time diagram of check weighing page 32

GA Get Average

Issuing the GA command the DAS 72.1 returns the current average weight value by using the MT setup.

Master ( PC / PLC ) sends DAS 72.1 responds Result

GA¿

A+01100

Answer: GA=1100 g

Note: During the time between the trigger condition being accepted and the average value being updated, the GA command will return the value 99 999.

TE Trigger Edge

Issuing the TE command selects rising or falling edge trigger. Parameter = 0 select falling edge and parameter = 1 select rising edge.

Master ( PC / PLC ) sends DAS 72.1 responds Result

TE_0

E:001

Request: TE=1

Setting: TE=0

Factory default: 0 [falling edge]

See time diagram of check weighing page 32

Manual DAS 72.1 Page 31

TR Trigger

This command will start the measuring cycle in the same way as the hardware trigger input.

Master ( PC / PLC ) sends DAS 72.1 responds Result

TR¿

Trigger started

TL Trigger Level

Set the trigger level for rising edge start of measurement. Permitted values are in the range 0 … 99 999.

Master ( PC / PLC ) sends DAS 72.1 responds Result

TL¿

TL_1000

T+99999

Request: TL=99 999

Setting: TL=1 000

With regard to all the trigger commands (SD, TR, TE, TL), a check weighing will automatically restart when the weight falls below or overshoots by 1000 d (increment), e.g. 100,0 g.

Factory default: 99 999

The Timing Diagram for Check Weighing

(g)

Trigger point choose 1 of 3:

1. Light barrier or

2. TR command or

3. TL Trigger Level

Typical Checkweigher Signal

Start Delay

Measuring Time

Page 32 Manual DAS 72.1

C.4.3 Calibration Commands – CE, CI, CM, DS, DP, CZ, CG, AZ, AG, ZT, FD, CS

Note: TAC represents Traceable Access Code (calibration counter).

CE TAC counter reading

With this command you get the TAC counter reading or you can enable a calibration sequence.

Master ( PC / PLC ) sends DAS 72.1 responds Result

CE¿

CE_17¿

E+00017 (example)

Request: TAC-counter CE17

Calibration sequence active

This command must be issued PRIOR to any attempt to set the calibration parameters CZ, CG etc. In legal for trade applications the TAC counter can be used to check if critical parameters have been changed without re-verification. After each calibration the TAC counter increases by 1.

CI Set minimum output value

This command is used for setup minimum allowable output value. Permitted values are 0 ... -99 999

Master ( PC / PLC ) sends DAS 72.1 responds Result

CI¿

CE¿

CE_17¿

CI_-10000¿

I-00300

E+00017 (example)

Request: CI = -300

Request: TAC-counter CE17

Calibration sequence active

Setting: CI = -10 000

This value will determine the point at which the output will change to “uuuuuu”, signifying under-range.

Factory default setting: -9 000.

CM Set maximum output value

This command is used for setup the maximum output value. Permitted values are between 1 … 99 999.

Master ( PC / PLC ) sends DAS 72.1 responds Result

CE_17

CM_50000

M+30000

E+00017 (example)

Request: CM = 30 000

Request: TAC-counter CE17

Calibration sequence active

Setting: CM = 50 000

This value will determine the point at which the output will change to “oooooo”, signifying over-range.

Note: The range, in which a scale can be set to zero (SZ) or automatic zero tracking (ZT) is active, is +/- 2% of CM value.

Factory default: CM = 99 999.

Manual DAS 72.1 Page 33

DS Display step size

This command allows the output to step up or down by a unit other than 1. Permitted values are 1, 2, 5, 10, 20, 50, 100 and 200.

Master ( PC / PLC ) sends DAS 72.1 responds Result

DS¿

CE¿

CE_17¿

DS_50¿

S+00002

E+00017 (example)

Request: display step size 2 Request: TAC-counter CE17

Calibration sequence active

Setting: step size 50

DP Set decimal point position

This command allows the decimal point to be positioned anywhere between leftmost and rightmost digits of the 5-digit output result. Position 0 means no decimal point.

Master ( PC / PLC ) sends DAS 72.1 responds Result

DP¿

CE¿

CE_17¿

DP_0¿

P+00002

E+00017 (example)

Request: position of decimal point

Request: TAC-counter CE17

Calibration sequence active

Setting: no decimal point

CZ Set calibration zero point

This is the reference point for all weight calculations, and is subject to TAC control.

Master ( PC / PLC ) sends DAS 72.1 responds Result

CE¿

CE_17¿

CZ¿

E+00017 (example)

Request: TAC-counter CE17

Calibration sequence active

Zero point saved

Factory default: approx. 0 mV/V input signal

CG Set calibration gain (span) value

This is the reference point for calibration under load, and is subject to TAC control. Permitted values are 1 … 99 999.

Master ( PC / PLC ) sends DAS 72.1 responds Result

CG¿

CE¿

CE_17¿

CG_15000¿

G+10000

E+00017 (example)

Request: measuring range 10 000 d

Request: TAC-counter CE17

Calibration sequence active

Setting: span 15 000 d

For calibration an input signal near the display maximum (CM) will give the best system performance. The minimum calibration load of at least 20% is recommended.

Factory default: 20 000 = 2,000 mV/V input signal

Page 34 Manual DAS 72.1

AZ Absolute zero point calibration

The command AZ is used as reference point for all weight calculations and will setup in mV/V. Permitted values are ± 32 000 (= ± 3.2000 mV/V).

Master ( PC / PLC ) sends DAS 72.1 responds Result

AZ¿

CE¿

CE_17¿

AZ_00500¿

Z+0.0005

E+00017 (example)

Request: Zero point @ 0.0005 mV/V

Request: TAC-counter CE17

Calibration sequence active

new: Zero point @ 0.0500 mV/V

Factory default: 00 000 @ 0.0000 mV/V input signal.

AG Absolute gain calibration

The command AG is used as absolute gain (or measuring range) for all weight calculations and will setup in mV/V. Permitted values are ± 32 000 (= ± 3.2000 mV/V).

Master ( PC / PLC ) sends DAS 72.1 responds Result

AG¿

CE¿

CE_17¿

AG_17500_10000¿

G+2.0000

E+00017 (example)

Request: Meas. range 2.000 mV/V

Request: TAC-counter CE17

Calibration sequence active

new: Measuring range

1.750 mV/V @ 10 000 d

Factory default: 10 000 @ 2.0000 mV/V input signal.

ZT Zero tracking

This command enables or disables the zero tracking. Parameter = 0 disables the zero tracking and parameter = 1 enables the zero tracking. Issuing the command without any parameter returns the current ZT value.

Master ( PC / PLC ) sends DAS 72.1 responds Result

ZT¿

CE¿

CE_17¿

ZT 0¿

Z: 001

E+00017 (example)

Request: ZT-Status

Request: TAC-counter CE17

Calibration sequence active

Setting: ZT = OFF

Zero tracking will be performed only on results less than +/-0.5 d at a rate of 0.4 d/sec, where d = display step size (see DS command). The zero can only be tracked to +/- 2% of maximum (see CM command).

Factory default: ZT=0

Manual DAS 72.1 Page 35

FD Factory default settings

This command puts the DAS 72.1 back to a known state. The data will be written to the EEPROM and the TAC will be incremented by 1.

Note: All calibration and setup information will be lost by issuing this command!

Master ( PC / PLC ) sends DAS 72.1 responds Result

CE¿

CE_17¿

FD¿

E+00017 (example)

Request: TAC-counter CE17

Calibration sequence active

Factory default setting

CS Save the calibration values

This command results in the calibration values being saved to EEPROM, and causes the TAC to be incremented by 1.

Master ( PC / PLC ) sends DAS 72.1 responds Result

CE¿

CE_17¿

CS¿

E+00017 (example)

Request: TAC-counter CE17

Calibration sequence active

Calibration values saved

The CS command saves all of the calibration group values, as set by CZ, CG, CM, DS, DP and ZT. The command returns ERR and has no updating action unless it is preceded by the CE_XXXXX.

Page 36 Manual DAS 72.1

C.4.4 Motion detection Commands – NR, NT

The motion detection facility provides a means of disabling certain functions whenever a condition of instability, or “motion”, is detected. The “no-motion” or “stable” condition is achieved whenever the signal is steady for the period of time set by NT, during which it cannot fluctuate by more than NR increments.The stable condition activates the relevant bit of responses to “Info Status” (IS).

ATTENTION:

The following functions are disabled if motion is detected: “Calibrate Zero” (CZ) “Calibrate Gain” (CG) “Set Zero” (SZ) and “Set Tare” (ST).

NR No Motion range

This is the range within which the weighing signal is allowed to fluctuate and still be considered as “stable”. Permitted values are between 1 and 65 000.

Master ( PC / PLC ) sends DAS 72.1 responds Result

NR¿

NR_2¿

WP¿

R+00010

Request: NR = 10 d

Setting: NR = 2 d

Setting saved

NR = 2 i.e. fluctuations within a maximum of±2d,intheperiod NT, will be considered “stable”.

Factory default: NR = 1.

NT Stabilisation time for in motion band

This sets the time (in milliseconds) over which the weight signal is checked to see if it is “stable” or has “no-motion“. The weight signal has to vary by less than NR divisions over the time period NT to be considered ‘stable’. Permitted range 1 ... 65 535 milliseconds.

Master ( PC / PLC ) sends DAS 72.1 responds Result

NT¿

NT_500¿

WP¿

T+01000

Request: NT = 1 000 ms

Setting: NT = 500 ms

Setting saved

If the value of NT =500 milliseconds, the output must not fluctuate more than NR increments within 500 milliseconds in order to be considered “stable”.

Factory default: NT = 1 000 [=1000 ms].

Manual DAS 72.1 Page 37

C.4.5 Filter setting Commands – FM, FL, UR

Using the commands FM and FL, a digital filter type and strength can be set which will eliminate most of the unwanted disturbances. Please note that these filters are positioned immediately after the A/D Converter and therefore affect all aspects of the weighing operation.

FM Filter Mode FIR / IIR

Choose filter mode, permitted values are “0” for IIR and “1” for FIR.

Master ( PC / PLC ) sends DAS 72.1 responds Result

FM¿

FM_0¿

WP¿

M+00001

Request: FM = 1 (FIR)

Setting: FM = 0 (IIR)

Setting saved

The digital IIR filter works as a low-pass filter of 2nd order with Gaussian characteristic, damping is 40 dB/decade; see table mode 0.

The digital FIR filter works as a low-pass filter with quick response; damping see table mode 1.

Factory default: 0

FL Setup filters

Command for setup cut off frequency, permitted values are 0 … 8.

Master ( PC / PLC ) sends DAS 72.1 responds Result

FL¿

FL_1¿

WP¿

F+00003

Request: FL = 3

Setting: FL = 1

Setting saved

Filter values can be choosen between 0 and 8, see table below.

FL= 0 means no filter in mode 0 or 1 (command FM).

Factory default: 3

Mode 0 Characteristic (IIR-Filter)

FL Settling time to 0.1%

(ms) 0 no filtering ** 600 1551857600 2 122 8 78 600 3 242 4 96 600 4 322 3 104 600 5 482 2 114 600 6 963 1 132 600 7 1923 0.5 149 600 8 3847 0.25 164 600

3dB Cut-off frequency

(Hz)

* Output-rate = 600/2URsamples/s ** Antialiasing filter 17 Hz @ 60 dB/decade

Damping @300Hz

(dB)

Output-rate*

(samples/s)

Page 38 Manual DAS 72.1

Mode 1 Characteristic (FIR-Filter)

FL Settling time to

0.1%

(ms) 0 no filtering ** 600 1 47 19.7 48 64 >90 >80 600 2 93 9.8 24 32 >90 >40 300 3 140 6.5 16 21 >90 >26 200 4 187 4.9 12 16 >90 >20 150 5 233 3.9 10 13 >90 >16 120 6 280 3.2 8 11 >90 >13 100 7 327 2.8 7 9 >90 >11 85.7 8 373 2.5 6 8 >90 >10 75

3dBCut-off

(Hz)

20 dB damping

at frequency

(Hz)

40 dB damping

at frequency

(Hz)

Dampinginthe

stopband

(dB)

Stopband

(Hz)

Output rate

max.

(samples/s)

** Antialiasing filter 17 Hz @ 60 dB/decade

Attention:

In mode 1 the output rate is dependant on the selected filter level (FL).

UR Set the update rate (average building)

This command will define over how many measurements, from the preceeding IIR or FIR filter, an average will be calculated. The average will be calculated over 2

samples. Permitted values 0...7 (see table below)

UR 01234567

numberofsamples1248163264128

Check / adjustment update rate:

Master ( PC / PLC ) sends LDU XX.X responds Result

UR¿

UR_4¿

U+0001

Request: average over 2 samples Setting: average over 16 samples

Factory default: 0 [no average, = 600 samples/s]

Remark to Mode 1

Dependency Output Rate - averaging UR - Filter FL

UR Output Rate samples/s

FL 0 FL 1

19.7 Hz 0 600 600 300 200 150 120 100 85.7 75 1 300 300 150 100 75 60 50 42.85 37.5 2 150 150 75 50 37,5 30 25 21.42 18.75 3 75 75 37.5 25 18.75 15 12.5 10.71 9.38 4 37.5 37.5 18.75 12.5 9.38 7.5 6.25 5.36 4.69 5 18.75 18.75 9.38 6.25 4.69 3.75 3.13 2.68 2.34 6 9.38 9.38 4.69 3.13 2.34 1.88 1.56 1.34 1.17 7 4.69 4.69 2.34 1.56 1.17 0.94 0.78 0.67 0.59

FL 2

9.8 Hz

FL 3

6.5 Hz

FL 4

4.9 Hz

FL 5

3.9 Hz

FL 6

3.2 Hz

FL 7

2.8 Hz

FL 8

2.5 Hz

Manual DAS 72.1 Page 39

C.4.6 Set Zero/Tare and Reset Zero/Tare Commands – SZ, RZ, ST, RT

The following commands allow you to set and reset zero and tare values. The zero set during calibration remains the ‘true zero’ but new ‘current zero’ can be set using the SZ command. If the SZ command is issued and accepted then all weight values will then be based on the new ‘current zero’. Please remember that zero value will be subject to the Zero tracking function if enabled.

If the weight signal is not stable (as defined by the No motion range NR and the No motion time NT) then both the set zero SZ and set tare ST commands will be disabled.

Also the Set Zero SZ command is not allowed if the new zero value required and the ‘calibration zero’ differ by more than2%oftheCMvalue (maximum allowable value).

See chapter 8 “Legal for trade” applications.

SZ Set Zero

This command sets a new “current zero” which is then the basis of all weight values until further updated by the zero tracking function, another SZ command or the “reset zero” command RZ. The SZ command will fail (DAS 72.1 responds with ERR) if the new “current zero” is more than 2% (of the CM value) higher or lower than the “true zero” set during calibration. The SZ command will also fail if the weight signal is not stable as defined by the No motion range (NR) and the No motion time (NT). If the weight signal is “stable”, the response to the IS command (Device Status) will show the “signal stable” bit active and the SZ command will be accepted (OK). If the “signal stable” bit is not active, the SZ command will be rejected and the DAS 72.1 will respond with ERR (error).

Master ( PC / PLC ) sends DAS 72.1 responds Result

SZ¿

Set zero performed

The SZ command is issued without any parameters and will return either the OK or ERR response. If the SZ command is accepted the DAS 72.1 responds with OK and the “zero action performed” bit of the device status (IS) response will be active.

If the command is acknowledged by the DAS 72.1 with OK, the status bit for Zero (request IS) is set to 1. A renewed SZ command or the reset zero command [ RZ ] changes the current zero point. The command is not implemented, if the current measured value is more than ±2% of the maximum display value [ CM ] of calibrated zero point [ CZ ]. DAS 72.1 response is ERR (error).

RZ Reset Zero Point

This command cancels the SZ command and the zero reading reverts to that set by the CZ command during calibration.

Master ( PC / PLC ) sends DAS 72.1 responds Result

RZ¿

Zero point CZ active again

The DAS 72.1 responds to the RZ command with either OK or ERR. If OK is returned then the “zero action performed” bit in the Device Status (IS) response will be set to “0”.

Page 40 Manual DAS 72.1

ST Set Tare

This command will activate the net weighing function by storing the current weight value as a tare.

The weight signal must be “stable” within the limits set by NR (No Motion Range) and NT (No Motion Time) commands for the “signal stable” bit to be active and set tare command to be accepted.

Master ( PC / PLC ) sends DAS 72.1 responds Result

ST¿

Tare performed

If the weight signal is “stable”, the response to the IS command (Device Status) will show the “signal stable” bit active and the ST command will be accepted (OK). If the “signal stable” bit is not active, the ST command will be rejected and the DAS 72.1 will respond with ERR (error)

RT Reset Tare

The weighing signal returns to gross mode.

Master ( PC / PLC ) sends DAS 72.1 responds Result

RT¿

Tare deactivated

The DAS 72.1 responds to the RT command with either OK or ERR. If OK is returned then the “tare active” bit in the Device Status (IS) response will be set to “0”.

Manual DAS 72.1 Page 41

C.4.7 Output Commands – GG, GN, GT, GS, GM, RM, GH, GO, GV, GW

The following commands “Get” the Gross, Net, Tare, long weight and ADC (Sample) values from the DAS

72.1.

GG Get Gross value

Master ( PC / PLC ) sends DAS 72.1 responds Result

GG¿

G+01.100

Gross 1 100 d

GN Get Net value

Master ( PC / PLC ) sends DAS 72.1 responds Result

GN¿

N+01.000

Net 1 000 d

GT Get Tare value

Master ( PC / PLC ) sends DAS 72.1 responds Result

GT¿

T+000.100

Tare 100 d

GS Get ADC Sample value

This command gets the actual Analogue to Digital Converter (ADC) value. This can be useful during development or when calibrating to see how much of the ADC range is being used.

Master ( PC / PLC ) sends DAS 72.1 responds Result

GS¿

S+125785

AD-value=125 785 d

For service applications, it is helpful to note the GS values for the “no-load” or “zero” output and when the “calibration load” is applied.

GM Get Peak value

This command gets the actual Peak value. This function has to be activated in menu 6.x.1 together with the command AIx

Master ( PC / SPS ) sends

GM¿

DAS 72.1 responds Result

M+01.100

Peak value 1 100 d

Remark

The result of Peak value is depending on setup of Filter FL, Filtermode FM and Update-Rate UR (average building).

RM Deletes Peak value

Master ( PC / SPS ) sends

RM¿

DAS 72.1 responds Result

Peak value deleted

GH Get Hold value

Master ( PC / PLC ) sends DAS 72.1 responds Result

GH¿

H+01.100

Hold value 100 d

Page 42 Manual DAS 72.1

GO Get Peak to Peak value

Master ( PC / PLC ) sends DAS 72.1 responds Result

GO¿

O+01.000

Peak to Peak value 1 000 d

GV Get Valley value

Master ( PC / PLC ) sends DAS 72.1 responds Result

Valley value 1 000 d

GV¿

V+01.000

Get the “long” weight values (in a data string)

Command for output of the current net weight, gross weight, scale status and checksum values. No decimal point is available in this data string.

Master ( PC / PLC ) sends DAS 72.1 responds Result

GW¿

W+00100+01100010F

Explanation (see below)

The response is in the format W+00100+01100010F. The first two sections of the return string comprise the net weight and gross weight results, followed by two hexadecimal characters, which represent two bitmapped status indicators. The last two hexadecimal characters represent the checksum, which is the inverse of the sum of all the ASCII values of the string, not including the checksum characters.

W +00100 +01100 0 1 0F

leading character

signifies the GW

response

net weight

excluding decimal

point

gross weight

excluding decimal

point

first

bitmapped binary

value

second bitmapped

binary value

checksum

Status bit:

first bit value description

1 not used 1 no motion 2 output 1 active 2 zero action performed 4 output 2 active 4 tare active 8 output 3 active 8 not used

second bit value description

The checksum is derived as follows :

a. Add the ASCII values (in hex) of all the 15 characters in the string b. Invert the hexadecimal value c. Add one to the value d. Use only the last two digits e. Convert the hexadecimal value to characters

Manual DAS 72.1 Page 43

C.4.8 Auto-transmit Commands – SG, SN, SW, SM, SH, SO, SV

The following commands allow the gross weight or net weight values to be continuously sent. Continuous transmission starts as soon as the relevant command has been issued and finishes when any other valid command is accepted by the DAS 72.1. The data output rate will depend on the baud rate being used e.g. with a baud rate of 9600, approximately 100 readings per second can be transmitted.

Note: The commands will only work if the DAS 72.1 has been set to full duplex [DX=1].

The continuous transmission of either the gross or net values will stop when another valid command is received by the DAS 72.1.

SG Send the Gross weight value continuously

Master ( PC / PLC ) sends DAS 72.1 responds Result

SG¿

G+01100

Gross value 1 100 d

SN Send the Net weight value continuously

Master ( PC / PLC ) sends DAS 72.1 responds Result

SN¿

N+01000

Net value 1 000 d

SW Auto-transmit of the “long” weight values (in a data string)

Command forcontinuous output of the current netweight, gross weight, scale status and checksumvalues. No decimal point is available in this data string.

Master ( PC / PLC ) sends DAS 72.1 responds

SW¿

W+00100+01100010F

Explanation see below

Result

Further explanation see command GW (page 42)

SM Peak value transmitted continuously

This command gets the actual Peak value. This function has to be activated in menu 6.x.1 together with the command AIx

Master ( PC / PLC ) sends DAS 72.1 responds

Result

SM¿

M+01.100

Peak value 1 100 d

Remark

The result of Peak value is depending on setup of Filter FL, Filtermode FM and Updatet-Rate UR (average building).

SH Hold value transmitted continuously

This command gets the actual Hold value. This function has to be activated in menu 6.x.1 together with the command AIx

Master ( PC / PLC ) sends DAS 72.1 responds

SH¿

Page 44 Manual DAS 72.1

H+01.100

Result

Hold value 1 100 d

SO Peak to Peak value transmitted continuously

This command gets the actual Peak to Peak value. This function has to be activated in menu 6.x.1 together with the command AIx

Master ( PC / PLC ) sends DAS 72.1 responds

SO¿

M+01.100

Peak to Peak value 1 100 d

Result

SV Valley value transmitted continuously

This command gets the actual Valley value. This function has to be activated in menu 6.x.1 together with the command AIx

Master ( PC / PLC ) sends DAS 72.1 responds

SV¿

M+01.100

Result

Valley value 1 100 d

Manual DAS 72.1 Page 45

C.4.9 Commands for external I/O control – IN, IO, OM, AI

The DAS 72.1 has 3 independent logic inputs and 3 independent logic outputs. These inputs and outputs can be configured and controlled completely. The logic inputs can be read directly by the host application and the logic outputs can be fully controlled via the setpoint commands.

The use of the setpoint commands (Sn, Hn, Pn, An) are explained in the following chapter 4.10.

IN Read the status of the logic inputs

This command reads the status of the logic inputs.

Master ( PC / PLC ) sends DAS 72.1 responds Result

IN¿

IN:0001

IN:0010

IN:0011

IN:0100

Input 1 active Input 2 active

Input 1 and 2 active

Input 3 active

The status response is in the form of a four digit code where 0 = false and 1 = true (inputs are active “high”), the least significant bit corresponding to Input 1 etc.

IO Read/Modify the status of the output channels

This command reads and can modify the status of the logic outputs (if enabled by the OM command). The status response is in the form of a four digit code where 0 = false and 1 = true (outputs are normally open, open drain MOSFETs), the least significant bit corresponding to Output 1 etc.

Request

Master ( PC / PLC ) sends DAS 72.1 responds Result

IO¿

IO:0001

IO:0010

IO:0011

IO:0100

Output 1 active Output 2 active

Output 1 and 2 active

Output 3 active

The status of the outputs can be changed by issuing the IO command with the appropriate 4 digit code e.g. IO 0001 where in this example output 1 will be activated (FET conducting). Please note that the status of the logic outputs is normally determined by the internal setpoints (see section 4.10) and therefore setting the logic output status using the IO commands is not allowed.

Setting

Master ( PC / PLC ) sends DAS 72.1 responds Result

IO_0001¿

IO_0010¿

IO_0011¿ OK

IO_0100¿ OK

Output 1 active Output 2 active

Output 1 and 2 active

Output 3 active

However, the OM command can be used to allow the status of the logic outputs to be set via the IO command or set their status directly by the host application.

Factory default: IO=0 000

Page 46 Manual DAS 72.1

OM Control of the logic outputs by the host application

The logic outputs can be controlled by the host application (as opposed to the normal internal setpoints) if they are enabled by the IM command and the appropriate 4 digit code.

Request

Master ( PC / PLC ) sends DAS 72.1 responds Result

OM¿

OM:0001

OM:0010

OM:0011

OM:0100

Enable Output 1 Enable Output 2

Enable Output 1 and 2

Enable Output 3

A “1” bit in the code enables the corresponding logic output to be controlled by the host application using the IO command. A “0” in the code leaves the corresponding logic output controlled by the internal setpoint. Logic output 1 is again the least significant bit.

Setting

Master ( PC / PLC ) sends DAS 72.1 responds Result

OM_0001¿

OM_0010¿

OM_0011¿

OM_0100¿

Enable Output 1 Enable Output 2

Enable Output 1 and 2

Enable Output 3

Note: When reading the status of the logic outputs using the IO command, the setpoint status will be returned regardless of the OM setting. Sending OM_0000 disables the external logic output control.

Factory default: OM=0 000

AI Function of Logic Input 1, 2 or 3

The DAS 72.1 has 3 independent logic inputs. These inputs can be configured as follows:

0o: no function 01: acts as Zero button 02: acts as Tare button 03: acts as UP Arrow button 04: acts as DOWN Arrow button 05: starts the trigger function 06: displays the Average value 07: displays the Peak value

Master ( PC / PLC ) sends DAS 72.1 responds Result

AI_1¿

AI_1_6¿

AI_1¿

08: deletes the Peak value 09: displays the Hold value 10: displays the Peak to Peak value 11: displays the Valley value 12: disables the keyboard 13: stores the actual weight 14: tares display and deletes all other values

like 08

I1:+00000

I1:+00006

no function

set display GA value

display GA value

Similarly to read or set the logic input 2 or 3, use AI_2 or AI_3 instead of AI_1.

Factory default: 0

Manual DAS 72.1 Page 47

C.4.10 Setpoint Commands - Sn, Hn, Pn, An

The DAS 72.1has 3logic outputs wherethe status isdependent on the weight value (setpoint).Each logic output can be assignedan independentsetpoint value (Sn)with acorresponding hysteresis (Hn), switchaction (Pn) and base (An – switch on the gross or the net weight).

Sn Setpoint value for logic output 1, 2 or 3

Request / Setting

Master ( PC / PLC ) sends DAS 72.1 responds Result

S1¿

S1_03000¿

S1:+01500

setpoint S1 = 1 500 d

setpoint S1= 3 000 d

Similarly to read or set the logic output 2 or 3 setpoint, use S2 or S3 instead of S1.

H1 Hysteresis for logic output 1, 2 or 3

Using the H1 command, the hysteresis on the setpoint value is set by the numeric value. Permitted values are 1 … 9 999.

Master ( PC / PLC ) sends DAS 72.1 responds Result

H1¿

H1_03000¿

H1:+00100

Hysteresis H1 = 100 d

Hysteresis H1 = 3 000 d

Pn Switch Logic for output 1, 2 or 3

Using the P1 command, the switch characteristic setpoint S1 ”ON“ or ”OFF“ will be setup. Permitted values are0or1.

Master ( PC / PLC ) sends DAS 72.1 responds Result

P1¿

P1_00001¿

P1:+00000

switch logic P1 = 0 switch logic P1 = 1

Example

Setpoint Hysteresis Switch logic Load Output open Output closed S1 = 2 000 kg S1 = 2 000 kg S1 = 2 000 kg S1 = 2 000 kg

H1 = 100 kg P1 = 1 increasing H1 = 100 kg P1 = 1 decreasing H1 = 100 kg P1 = 0 increasing 0 ... 1 999 kg H1 = 100 kg P1 = 0 decreasing 1 900 ... 0 kg

³ 2 101 kg ³ 2 000 kg

0 ... 2 100 kg 1 999 ... 0 kg

³ 2 000 kg ³ 1 901 kg

Example switch logic P1=1 for setpoint (S1) of 2 000 kg (lines1&2oftable above):

When the weight is increasing between 0 kg and 2100 kg the logic output is “ON”. Once the weight increases above 2 100 kg then the logic output is “OFF”. The logic output will come “ON” again when the weight value drops below 2 000 kg.

Example switch logic P1=0 for setpoint (S1) of 2 000 kg (lines 3 & 4 of table above):

When the weight is increasing between 0 kg and 1 999 kg the logic output is “OFF”. Once the weight increases above 1 999 kg then the logic output is “ON”. The logic output will switch “OFF” again when the weight value drops below 1 900 kg.

Page 48 Manual DAS 72.1

A2 Request / Set the Base for logic output 1,2 or 3

The A1 command defines the Base on which the setpoint value acts. If A1 is set to “0” then setpoint 1 acts on the unfiltered gross weight. If A1 is set to “1” then setpoint 1 acts on the unfiltered net weight.

A1 = 0 Not filtered gross weight A1 = 1 Not filtered net weight A1 = 2 Peak value A1 = 3 Average value A1 = 4 Hold value A1 = 5 Peak to Peak value A1 = 6 Valley value A1 = 7 Error message for ERROR 4/5 A1 = 8 Output diabled

Request / Set Base for logic output 1

Master ( PC / PLC ) sends DAS 72.1 responds Result

A1_1

0+00000

Allocation gross weight

Allocation net weight

Similarly to read or set the logic output 2/3 Base, use A2/A3 instead of A1.

NOTE: All changes to the setpoint settings have to be stored in EEPROM using the SS command. See section 4.13.

Manual DAS 72.1 Page 49

C.4.11 Communication setup Commands – AD, CL, BR, DX, OP, LI

NOTE: These settings will only take effect after a power on reset (remember to store the settings using the

WP command before turning the power off.)

AD Device address setup / request

Setting the device address to 0 will cause the device to be permanently active, listening and responding to every command on the bus without the need for an OP command.

Request

Master ( PC / PLC ) sends DAS 72.1 responds Result

AD_49

A:000

Request: Address 0

Setting: Address 49

Factory default: Address 0

CL Close Device address n

Master ( PC / PLC ) sends DAS 72.1 responds Result

CL_3

Close device 3

BR Request / Setup Baud rate

With this command the following Baud rates can be setup: 9 600, 19 200, 38 400, 57 600 and 115 200 Baud.

Master ( PC / PLC ) sends DAS 72.1 responds Result

BR¿

BR_115200¿

B 9600

Request: 9 600 Baud

Setting: 115 200 Baud

Factory default: 9600 Baud

In section 2 (page 24) an automatic search and adjusting mode for Baud rate is described. For this the sol der pads SW3 must be closed.

DX Half or full duplex communication

With this command the communication can be set to half (DX=0) or full duplex (DX=1).

Master ( PC / PLC ) sends DAS 72.1 responds Result

DX_1

X:000

Request: DX=0 half-duplex

Setting: DX=1 full-duplex

Half duplex communication can be used for 2 wire RS485 communication.

Note: The auto transmit commands SG, SN and SW will only work if full duplex communication (DX=1) is selected.

Factory default: DX=0 (half duplex)

Page 50 Manual DAS 72.1

OP Device communication enable / request

This command, if sent without parameters, requests the address or device number of the device active on the bus. If sent with parameters, this enables the device defined by the parameters.

Request / Enable device communication

Master ( PC / PLC ) sends DAS 72.1 responds Result

OP¿

OP_14¿

O:003

Request: device 3 open Setting: open device 14

The requested device acknowledges its readiness and responds to all bus commands until a further OP command arrives with a different device address or a CL command is received.

LI Listing of complete setup

After issuing command LI the DAS 72.1 Mark II answers with following data string:

TAC : +00005

1.1 : ON

1.2,

1.3 : +01.531

2.1 : +05000

2.2,

2.3 : +02.239

2.4 : +00001

3.1.O : +20000

7.3.1.1 : +00999

7.3.1.2 : On

7.3.2 : +00000

7.3.3 : GROSS

8.1 : 9600

8.2 : RS422

8.3 : +00000

8.4 : OFF $

3.1.U : -10000

3.2 : +00001

3.3 : +00001

4.1 : +00003

4.2 : IIR

4.3 : +00002

4.4.1 : +00002

4.4.2 : +01000

5.1 : +00000

5.2 : +10000

5.3 : NET

6.1.1 : +00001

6.1.2 : +00000

6.1.3 : +00000

7.1.1.1 : +01000

7.1.1.2 : Off

7.1.2 : +00100

7.1.3 : GROSS

7.2.1.1 : +04000

7.2.1.2 : Off

7.2.2 : +00100

7.2.3 : GROSS

Manual DAS 72.1 Page 51

C.4.12 Commands Analogue Output 4 – 20 mA - AL, AH, AA

The following commands must be saved in EEPROM by command AS.

AA Sets the source which will be used by analogue output

Possible selections for analogue output:

AA = 0 gross weight AA = 1 net weight AA = 2 Peak value AA = 3 Average value AA = 4 Hold value AA = 5 Peak-to Peak value AA = 6 Valley value AA = 7 Hold value AA = 8 analogue output OFF

Request / Set up analogue output:

Master ( PC / PLC ) sends DAS 72.1 responds Result

AA_0

A+00001

Factory default: 2 [= analogue output OFF]

AH Set the analogue high level

Request / Set up high level for analogue output 20 mA:

Master ( PC / PLC ) sends DAS 72.1 responds Result

AH¿

AH_5000¿

H+10000

Factory default: 10 000 [10 000d=20mA]

AL Set the analogue low level

Request / Set up low level for analogue output 4 mA:

Master ( PC / PLC ) sends DAS 72.1 responds Result

AL¿

AL_00500¿

L+00000

set net

set gross

Request: 10 000 d @ 20 mA

Setting: 5 000 d @ 20 mA

Request: 00 000 d @ 4 mA

Setting: 500 d @ 4 mA

Factory default: 00 000 [0d=4mA]

Page 52 Manual DAS 72.1

C.4.13 Save parameters Commands – CS, WP, SS, AS, TH

The setup and calibration parameters can be divided into 4 groups:

Calibration parameter: CZ, CG, CM, CI, DS, DP, ZT, are saved by the CS command.

•

Setup parameters (other than setpoint): FL, FM, NR, NT, BR, AD, DX etc are saved by the WP command.

•

Setpoint parameters: Sn, Hn, Pn, An are saved by the SS command.

•

Analogue output parameters: AA, AH, AL are saved by the AS command.

•

Store Actual Weight saved by “TH“

•

CS Save Calibration Parameters

Calibration parameters can only be saved if the TAC code is known and precedes the CS command. See the CE and CS commands on page 33.

WP Save the setup parameters

With this command the settings of the “Filter” (FL, FM) ,the “No-Motion” (NR, NT) and the communication (AD, BR, DX) will be saved in the EEPROM.

Master ( PC / PLC ) sends DAS 72.1 responds Result

ERR

Parameter saved

Error

SS Save the “setpoint” set-up parameters

With this command the settings of the setpoints (Sn), the “setpoint hysteresis” (Hn), the “switch logic” (Pn) and the “setpoint action” (An) will be saved in EEPROM.

Master ( PC / PLC ) sends DAS 72.1 responds Result

ERR

Parameter saved

Error

AS Save the analogue output parameters

With this command the settings of the analogue output setup (AA, AH and AL) will be saved in EEPROM.

Master ( PC / PLC ) sends DAS 72.1 antwortet Result

AS¿

ERR

Parameter saved

Error

TH Save the actual weight

With this command the settings of the actual weight will be saved in EEPROM.

Master ( PC / PLC ) sends DAS 72.1 antwortet Result

TH¿

Manual DAS 72.1 Page 53

ERR

Parameter saved

Error

C.5 CALIBRATION PROCEDURE.

The calibration interface features a “TRACEABLE ACCESS CODE” (TAC), as is required for use in “Approved” applications (see section 7, “USE IN APPROVED APPLICATIONS” for more details). This feature also ensures that access to the calibration functions is protected from inadvertent or unauthorised change. The following parameters are considered as CALIBRATION commands:

CE: Calibration Enable - returns the current TAC value.

•

CZ: Calibrate zero - sets the system zero point.

•

CG: Calibrate gain - sets the system gain.

•

CM: Calibrate maximum - sets the maximum allowable display value.

•

DS: Display step size - sets the output incremental step size.

•

DP: Display decimal point - sets the position of the output decimal point.

•

ZT: Zero track enable.

•

FD: Factory default setting (return to)

•

CS: Calibration save.

•

Example: setup of zero point, gain and decimal point.

The choosen test weight has the value 5000 increments. That could be 500 g, 5 kg or also 5000 kg. We calibrate with 500 g. The decimal point is setup by command DP, here 1 figure after decimal point. A measured weight of 500 g is displayed as 500.0.

Master ( PC / PLC ) sends DAS 72.1 responds Result

CE¿

CE_17¿

CZ¿

CE_17¿

CG_5000¿

CG¿

CE_17¿

DP_1¿

CE_17¿

CS¿

E+00017

Scale no load !

Put calibration weight on (500 g) !

G+05000

Request: TAC-counter CE = 17

Calibration sequence active

System zero point saved

Calibration sequence active

Setting span

Request: span 5 000 d

Calibration sequence active

Setting: decimal point 0000.0

Calibration sequence active

Save calibration data in EEPROM

Zero point, gain and decimal point position were saved in the EEPROM; the calibration counter (TAC) is increased automatically by 1.

Page 54 Manual DAS 72.1

C.6 USE IN “APPROVED” APPLICATIONS (only as information)

The term “approved” applies whenever the weighing application is intended to be used for “legal-for-trade” weighing - that is, money will change hands according to the weight result. Such applications are bound by the legal metrology regulations of the relevant governments around the World, but most countries will comply with either the relevant EN’s (Euro Norms) or the relevant OIML (Organisation Internationale de Metrologie Legale) recommendations.

The LDU 78.1 (e.g.) has been approved as a component for use in weighing systems according to OIML recommendation R76, the highest performance level approved being Class III, 5000 division. The approval Authority was the Danish Electronics, Light & Acoustics (DELTA), and the approval certificate number was DK0199-R76-02.02 Revision 1, dated 30.07.2003. This approval will allow the use in approved weighing systems throughout Europe, and in many other countries of the World.

To achieve approval on a particular application, it will be necessary to satisfy the relevant Governmental Trading Standards Authority that the requirements of the various rules and regulations have been satisfied. This task is greatly simplified if the key components of the weighing system, namely the load cells and the weighing indicator or digitizer, are already approved as “components”.

Usually, a discussion with the Weighing Equipment Approvals Officers at the relevant National Weights & Measures Office will then reveal the extent of any pattern testing that may be necessary to ensure compliance.

Restrictions upon usage when in “Approved” applications

A number of performance restrictions must come into force. These restrictions are the number of display divisions, which become limited to 5000 divisions, and the sensitivity per display division, which becomes

0.7 mV per division.

Once installed in the application, an “approved” application will require “stamping” by an Officer of the relevant Governmental Trading Standards Department. This certifies the equipment or system as being in accordance to the relevant regulations and within calibration limits.

The Traceable Access Code (TAC)

The user software must then provide a guard against improper access of the calibration commands (see the “Calibration Commands” section). The DAS 72.1 digitizer features the “Traceable Access Code” or TAC method of controlling the access to the calibration commands group. This means that a code is maintained within the device, and is incremented whenever any change to any of the calibration commands is saved.

When performing the “stamping” test, the Trading Standards Officer will make a note of the TAC, and advise the user that any change to this code which occurs prior to the regular re-inspection by the Trading Standards Office, will result in legal prosecution of the user.

The user software is required as a condition of approval, to make the TAC available to the weight display indicator or console, on demand.

Manual DAS 72.1 Page 55

C.7 SOFTWARE (FIRMWARE) DOWNLOAD

For software update of DAS 72.1 a Windows PC with RS 232 port and a converter RS232 to RS485/RS422 is required. The solder pads on the back side of PCB (see drawing below) must be closed before switching on. After download the solder pads must be opened again.

A download is accomplished with help of our program “PROG78”.

C.7.1 Firmware update for DAS 72.1 Mark II series

First all necessary files (LduDownload.exe, prog78.a20, das72mII.a20) have to be stored in same directory. The firmware for DAS 72.1 is stored in file das72mII.a20.

Close the solder pads SW 4 on the under side of PCB.

•

Enable DAS 72.1.

•

Start program “DAS 72.1Download”.

•

Press button “Load” and choose file ”das72mII.a20”.

•

Press button “Program”.

•

At message “Reset DAS 72.1 before proceeding”switch the DAS 72.1 off and on again and press the button

•

“OK”. Download proceed. - The end will be indicated with ”Programing OK “.

•

Switch off DAS 72.1 .

•

Open solder pads on the back side of PCB again.

•

Now use a terminal program or DOP software for running a factory reset of DAS 72.1 by command FD.

•

Note: The command FD is TAC protected.

FD Factory default settings

This command puts the DAS 72.1 back to a known state. The data will be written to the EEPROM and the TAC will be incremented by 1.

Note: All calibration and setup information will be lost by issuing this command!

Master ( PC / PLC ) sends DAS 72.1 responds Result

CE¿

CE_17¿

FD¿

E+00017 (example)

close the solder pads SW4 before software download

back side

Request: TAC-counter CE17

Calibration sequence active

Factory default setting

Remark

On request we can supply a Download-Software for updating DAS 72.1 Mark III.

Page 56 Manual DAS 72.1

D CE DECLARATION OF CONFORMITY

Flintec GmbH Bemannsbruch 9 D 74909 Meckesheim

Konformitätserklärung

Artikel:

Hersteller:

Typ/ Modell:

Detaillierte Gerätebezeichnung:

Der Hersteller dieser Produkte versichert hiermit, daß die Produkte den Anforderungen der europäischen Normen für technische Instrumente entsprechen und sowohl die Sicherheitsvorschriften, als auch andere Schutzbestimmungen und die allgemein genehmigten Regeln für technische Sicherheit, Umweltschutz und elektromagnetische Verträglichkeit eingehalten werden.

Es wird weiterer versichert, daß die Artikel den vom Hersteller mitgelieferten Dokumenten entsprechen.

Um dieses sicherzustellen, sind während der Produktion alle notwendigen Überwachungsmaßen durchgeführt worden.

Geräte für digitale Datenerfassung von Wägezellen

Flintec GmbH

QLC62.1 LDU68.X LDU69.1 DAS72.1 CAP76.1 LDU78.X

UIM62.5 (Anzeigeneinheit); QLJ67.x (Verteilerkasten); UA73.x (Adapter); UA77.x (Adapter)

Die Produkte sind entsprechend den folgenden Richtlinien hergestellt und getestet worden:

Sicherheitsbestimmungen: CENELEC EN 60742

Elektromagnetische Kompatibilität: EN 55011 und EN 61000.

Meckesheim, 10. Oktober 2003

Gerhard K. Adam Geschäftsführer

Manual DAS 72.1 Page 57

Flintec DAS 72.1 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual