23
Interface and output
The device can be connected to a PC and operated with the
laboratory software labworld
soft
®
through the RS 232 port
(5), USB port (6) or USB port on the
WiCo
.
Note:
Please observe the system requirements together
with the operating instructions and help section included
with the software.
USB interface:
The Universal Serial Bus (USB) is a serial bus for connect-
ing 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. Use the USB interface in conjunction with lab-
world
soft
®
for operation in “Remote” mode and also to
update the firmware.
USB device drivers:
First, download the latest driver for
IKA
devices with USB
interface from:
http://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. Con-
figuration, command syntax and commands of the virtual
COM ports are as described in RS 232 port .
Device software update:
For device software update, visit
IKA
website
www.ika.
com
and enter the “Service” menu. Download and run
the Firmware Update Tool.
Find and click the Firmware Update Tool in your PC after
installation. Register your E-mail and password.
Connect the device to your PC via the USB cable. Then,
you can update the device software according to instruc-
tions of the Firmware Update Tool.
RS 232 interface:
Configuration
- The functions of the interface connections between the
stirrer machine and the automation system are chosen
from the signals specified in EIA standard RS 232 in ac-
cordance with DIN 66 020 Part 1.
- For the electrical characteristics of the interface and the al-
location of signal status, standard RS 232 applies in accor-
dance with DIN 66 259 Part 1.
- Transmission procedure: asynchronous character trans-
mission 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 stirrer machine to
the computer takes place only at the computer’s request.
Command syntax and format:
The following applies to the command set:
- Commands are generally sent from the computer (Mas-
ter) to the device (Slave).
- The device sends only at the computer’s request. Even
fault indications cannot be sent spontaneously from the
device to the computer (automation system).
- Commands are transmitted in capital letters.
- Commands and parameters including successive parame-
ters 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 recom-
mendations for the design of electrical plug connections for analogue and digital signal transmission on individual items of
laboratory control equipment, rev. 1.1).
The NAMUR commands and the additional specific
IKA
co mmands serve only as low level commands for communication
between the device and the PC. With a suitable terminal or communications programme these commands can be transmit-
ted directly to the circulator equipment. The
IKA
software package, Labworld
soft
®
, provides a convenient tool for control-
ling circulating equipment and collecting data under MS Windows, and includes graphical entry features, for pump motor
speed ramps for example.
Commands:
Commands
Function
IN_PV_1
Read the external actual temperature
IN_PV_2
Read the internal actual temperature
IN_PV_4
Read the pump actual speed
IN_SP_1
Read the internal setting temperature (if
0: internal control
)
Read the external setting temperature (if
1: external control
)
IN_SP_4
Read the pump setting speed
