Flintec LDU 69.1 - Manual (Page 8)

LDU 69.1 Technisches Handbuch, Rev. 12 January 2011 Page 8 of 28
4.3. Baud Rate / Device Address
Baud Rate:
For baud rate setup use command BR, see chapter 8.9
Factory default: 9 600 baud
Device Address:
For address setup use command AD, see chapter 8.9
Factory default: Address 0
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.
Note: The LDU XX.X series has sets of special solder pads on the under side of the PCB (see chapter 5.1). If
the solder pads are bridged then the LDU will be in a special configuration mode to set up the baud rate and
device address. This function should be used only when baud rate or address is unknown.
After power up, the LDU XX.X will enter a special baud rate search mode – waiting for a space character (0x20)
to be received. The time duration of this character is measured by the LDU and its baud rate timing will be set
accordingly – i.e. the baud rate of the terminal used will be the baud rate used by the LDU subsequently. The
device address will also be set to ”0“
4.4. Getting Started
You will require:
 PC or PLC with either a RS422 or RS485 communication port
 If using a PC / PLC with RS232 port, a RS422/485 to RS232 converter will be required (option UA 77.1)
 Interconnecting cabling - confirm that all relevant pins are used – see the wiring diagram at the end of
this section
 A load cell / scale with test weights or a load cell simulator
 A 12-24 VDC power supply capable of delivering approximately 100mA for each LDU and load cell
 One or more LDU 69.1
 A suitable ASCII communication software *
Refer to the following wiring diagram in chapter 5.
* You can easily communicate between a PC and an LDU using programs such as Procomm, Telemate, Kermit
or HyperTerminal (included in Windows).
Also the DOP software with graphical user interface and oscilloscope function, running under Windows
2000/XP is available as freeware. This software is included on the Flintec product CD-ROM (2008 or later).