Weighing scale configuration

The data logger reads whatever the scale sends, so the scale has to be sending weight on its own, as text, at 9600 baud. Most scales ship that way or close to it. Two that need a few settings changed are covered here. To check a scale that is not on this page, use Weighing scale compatibility.

Essae DS-252

Every setting is a numbered code, C10 to C23. You step through the codes and set each one to the value in the table.

Keys

Key	What it does
Zero	Enters configuration mode, together with the left arrow
Left arrow	Moves to the tens digit
Up arrow	Changes the digit under the cursor, and steps to the next code
Star (*)	Saves the value

Enter configuration mode

1. Press and hold Zero.
2. While holding it, press left arrow three times in quick succession.

Change a value

1. Press up arrow until the display shows the code you want, for example C10. After C25 it wraps back to C10.
2. Press star to open that code.
3. Up arrow changes the right-hand digit. It only counts up, and goes from 9 back to 0.
4. To change the left-hand digit, press left arrow once, then use up arrow.
5. Press star to save.

Settings

Set each code to its value. Write down what the scale had before you start, in case you need to put it back.

Code	Value	Code	Value
C10	14	C17	00
C11	21	C18	40
C12	10	C19	00
C13	00	C20	00
C14	01	C21	00
C15	11	C22	00
C16	11	C23	00

Mettler Toledo IND560

The IND560 has a COM1 port as standard. It is a three-wire RS232 interface: TXD, RXD and GND, with XON/XOFF flow control available. You configure what it sends with an output template, and tell COM1 to send that template continuously.

Build the template

1. In the Communications menu, go to Templates > Output.
2. Five templates are available, Template1 to Template5. Pick an empty one. The rest of this page uses Template3.
3. Press VIEW TABLE to see its elements. Press CLEAR to remove all of them, then EXIT to leave the table.

Now fill in the table:

1. Use UP/DOWN to select the template and press EDIT.
2. Select the first record and set Element Type to wt0102.
3. Press ENTER for more options. Set Format to right and Leading zero fill to disabled. Press OK.
4. Press DOWN to the next element and EDIT it.
5. Set Element Type to special character and the value to 0x0D (decimal 13, the carriage return \r). Press OK.

That gives one line per reading: the weight, then a carriage return.

Send it continuously

1. In the connection list, use UP/DOWN to highlight COM1 and press EDIT/INSERT.
2. Set Assignment to Continuous Template and Template to Template3. Press OK.

Set up COM1

On the COM1 setup screen:

Setting	Value
Baud	9600
Data bits	8
Parity	none
Flow control	none
Interface	RS232

You do not need to open the panel-mount enclosure to wire COM1. It is the 8-terminal connector at the rear, at the bottom of the panel. Turn the panel over so the connector faces you. TxD, RxD and GND are the first three terminals from the left.

Test it

1. Connect the terminal to a laptop with shielded twisted pair. Cross the wires, so the terminal’s TxD goes to the laptop’s RxD and the other way round.
2. Open a serial terminal on the laptop with the same settings as above. The steps for HTerm, screen and minicom are in Weighing scale compatibility.
3. Power up the terminal and the scale.
4. Put a weight on the platform, or press down on it and let go. The weight should scroll past on the laptop.

Reference: Mettler Toledo IND560 Terminal Technical Manual, 71209394.