DAD 141.1 Technical Manual, Rev. 2.5 – April 2015
Page 8 of 54
4.
Communications and Getting started
4.1. Serial Interface
Communicating with the digital amplifier DAD 141.1 is carried out via serial RS 422/485 port.
The data format is the familiar 8/N/1 structure (8 data bits, no parity, 1 stop bit).
Available baud rates of RS 422/485 port are as follows: 9600, 19200, 38400, 57600 or 115200 baud.
Factory default:
115200 baud
4.2. Command Language
The command set of the DAD 141.1 is based on a simple ASCII format (2 letters). This enables the user to
setup the device, get results or check parameters.
Example: DAD 141.1 is connected via the RS 485 port to a PC / PLC system. You want to get the identity,
firmware version or net weight.
Remark:
In this manual means:
“_“ Space in the setup command and “
“ Enter (CR); sending of a linefeed
(LF) is not required and will be ignored by the device if neccessary.
Master (PC / SPS) sends
Slave (DAD 141.1) responds
Meaning
ID
D:1410
identity of the active device
IV
V:0101
Firmware version of the active device
GN
N+123.45
Net weight with algebraic sign; decimal
point is fixed as setup with command DP
4.3. Baud Rate
For baud rate setup use command BR, see chapter 10.10.3.
Factory default:
115200 baud
4.4. Getting Started Via RS422/485
You will require:
PC or PLC with a RS 422/485 communication port
A load cell / scale with test weights or a load cell simulator
A 12-24 VDC power supply capable of delivering approximately 200mA for each DAD 141.1
and load cell(s)
One or more DAD 141.1
A suitable ASCII communication software
**
Refer to the wiring diagrams in chapter 5.
**
You can easily communicate between a PC and a DAD 141.1 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 is available.
Hint:
A download of a new firmware version can be done with the software
H&B programmer 3.0
(or later). The
download can be done via RS485 at a baud rate of 115200 or via Ethernet interface.
