21
Interfaces and outputs
The device can be operated by computer via an RS 232 or USB port using labworldsoft
®
labora-
tory software� The device software can also be updated with a PC via the RS 232 or USB port�
!
Notice!
Please comply with the system requirements together with the operating instruc-
tions and help section included with the software�
/// USB interface
The Universal Serial Bus (USB) is a serial bus for connecting the device to the PC� Equipped with
USB devices can be connected to a PC during operation (hot plugging)� Connected devices and
their properties are automatically recognized� The USB port can also be used to update firmware�
/// USB device drivers
First, download the latest driver for IKA devices with USB port from:
https://www.ika.com/ika/lws/download/usb-driver.zip
Install the driver by running the setup file� Then connect the IKA device through the USB data
cable to the PC�
The data communication is via a virtual COM port�
/// RS 232 interface
Configuration
› The functions of the interface connections between the device and the automation system are
chosen from the signals specified in EIA standard RS 232 in accordance with DIN 66 020 Part 1�
› For the electrical characteristics of the interface and the allocation of signal status, standard RS
232 applies in accordance with DIN 66 259 Part 1�
› Transmission procedure: asynchronous character transmission in start-stop mode�
› Type of transmission: full duplex�
› Character format: character representation in accordance with data format in DIN 66 022 for
start-stop mode� 1 start bit; 7 character bits; 1 parity bit (even); 1 stop bit�
› Transmission speed: 9600 bit/s�
› Data flow control: none
› Access procedure: data transfer from the device to the computer takes place only at the comput-
er’s request�
/// Command syntax and format
The following applies to the command set:
› Commands are generally sent from the computer (Master) to the device (Slave)�
› The device sends only at the computer’s request� Even fault indications cannot be sent spon-
taneously from the device to the computer (automation system)�
› Commands are transmitted in capital letters�
› Commands and parameters including successive parameters are separated by at least one
space (Code: hex 0x20)�
› Each individual command (incl� parameters and data) and each response are terminated with
Blank CR LF (Code: hex 0x0d hex 0x0A) and have a maximum length of 80 characters�
› The decimal separator in a number is a dot (Code: hex 0x2E)�
The above details correspond as far as possible to the recommendations of the NAMUR working
party (NAMUR recommendations for the design of electrical plug connections for analogue and
digital signal transmission on individual items of laboratory control equipment, rev� 1�1)�
