Interfaces And Outputs - IKA EUROSTAR digital Operating Instructions Manual

Interfaces and outputs

The appliance in the EUROSTAR power typ series are equip-
ped with a 15-pin SUB-D connector on the back. depending on
the option selected, the pins are supplied with analogue and/or
serial signals.
- Analogue output
(all versions EUROSTAR power basic and EUROSTAR power
control-visc)
On the pins with analogue signals there are voltage values for
EUROSTAR power basic
EUROSTAR power control visc
EUROSTAR power control visc P1
EUROSTAR power control visc P4
EUROSTAR power control visc P7
EUROSTAR power control visc 6000
the measurements of speed and torque.
- Serial interface RS 232 ( V24 )
(only on version EUROSTAR power control-visc)
The serial interface on the connector can also be used on the
appliance version EUROSTAR power control-visc to control the
appliance externally using a computer and suitable applications
programme (e.g. labworldsoft).
Configuration of serial Interfacel RS 232 C
– The functions of the interface connections between the stir-
rer machine and the automation system are chosen from the
signals specified in EIA standard RS232 C in accordance with
DIN 66 020 Part 1.
– For the electrical characteristics of the interface and the allo-
cation of signal status, standard RS 232 C applies in accordan-
ce with DIN 66 259 Part 1.
– Transmission procedure: asynchronous character transmissi-
on in start-stop mode.
22
(Fig. 7)
(9) 1VDC (10) (15) 1VDC
Torque Analogue Speed
measurement GND measurement
100 1000
100 1000
100 1000
200 270
400 145
25 2000
(Fig, 8)
– 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: hardware handshake RTS/CTS
RTS:(Pin 7) LOW (positive voltage): PC may send
RTS:(Pin 7) HIGH (negative voltage): PC may not send
CTS:(Pin 8) LOW (positive voltage): PC ready to receive
CTS:(Pin 8) HIGH (negative voltage): PC not ready to receive
– 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 (Master) to
the stirrer machine (Slave).
– The stirrer machine sends only at the computer's request.
Even fault indications cannot be sent spontaneously from the
stirrer machine 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 Blank LF (Code:
hex 0x20 hex 0x0d hex 0x20 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 recom-
mendations 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 communicati-
on between the stirrer machine and the PC. With a suitable ter-
minal or communications programme these commands can be
transmitted directly to the stirrer equipment. The IKA software
EUSTAR0707