LDU 179.1 Technical Manual rev. 1.10 - February 2019 Page 8 of 45
4. Communications and Getting started
4.1. Serial Interface
Communicating with the LDU 179.1 digitizer is carried out via serial RS 232 port.
The data format is the familiar 8/N/1 structure (8 data bits, no parity, 1 stop bit).
Available baud rates via the RS232 port are as follows: 9600, 19200, 38400, 57600, 115200, 230400 and
460800 baud.
Factory default:
115200 baud
4.2. Command Language
The command set of the LDU 179.1 is based on a simple ASCII format (2 letters). This enables the user to
setup the device, get results or check parameters.
Example: LDU 179.1 is connected via the RS232 port to a PC / PLC system. You want to get the identity,
firmware version or net weight.
Remark:
In this manual means: Space “_“ and Enter (CR/LF) “
“
Master (PC / SPS) sends
Slave (LDU 179.1) responds
Meaning
ID
D:1790
Identity of the device
IV
V:0107
Firmware version of the device
GN
N+1234.56
Net weight with algebraic sign/floating point
4.3. Baud Rate
For baud rate setup use command BR, see chapter 8.10.4
Factory default:
115200 baud
4.4. Getting Started
You will require:
PC or PLC with a RS232 communication port
A load cell / scale with test weights or a load cell simulator
A 12-24 VDC power supply capable of delivering approximately 100mA
One or more LDU 179.1
A suitable ASCII communication software
**
Refer to the following wiring diagram in chapter 5.
**
You can easily communicate between a PC and a LDU 179.1 using programs such as Procomm, Telemate,
Kermit, HyperTerminal or HTerm etc.
Additional the powerful software
DOP 4
with graphical user interface and oscilloscope function for the operating
systems Windows XP / Vista / 7 / 8 / 10 is available.
