Interfaces And Outputs - Ilmvac ROdist basic Serie Instrucciones De Manejo

Interfaces and outputs

Data transfer
RObath digital
The heating bath transfers data via IR interfaces. These are located
on the left display side of the heating bath or on the right side of the
drive unit. Do not place any objects between the two operating units
as otherwise the data transfer may be interrupted (fig. 15)!
ROdist digital
The RS 232 interface at the back of the device is fitted with a 9-pole
SUB-D jack and can be connected to a PC. The pins have serial si-
gnals. Using the laboratory device software "labworldsoft", the de-
vice can be operated in "Remote" mode.
Note: Please note the system requirements as well as the operating
instructions and help section included with the software.
Serial interface RS 232 (V24)
Configuration
- The functions of the interface lines between the device and the
automation system are a selection from the signals specified in
the EIA standard RS232 C, as per DIN 66 020 Part 1.
- For the electrical characteristics of the interface and the allocation
of signal status, standard RS 232 C 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 computer'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 stirrer machine sends only at the computer's request. Even
fault indications cannot be sent spontaneously from the stirrer ma-
chine 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).
PC 1.1 Cable (Fig. 16)
This cable is required to connect the 9-pin connector to a PC.
22
- Each individual command (incl. parameters and data) and each re-
sponse 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 recommen-
dations 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 ILMVAC co -
mmands serve only as low level commands for communication
between the rotary evaporator and the PC. With a suitable ter-
Fig.15
minal or communications programme these commands can be
transmitted directly to the rotary evaporator. The ILMVAC soft-
ware package, labworldsoft, provides a convenient tool for con-
trolling rotary evaporator and collecting data under MS Windows,
and includes graphical entry features, for motor speed ramps for
example.
The following table summarises the (NAMUR) commands un-
derstood by the ILMVAC control equipment.
Abbreviations used
X,y = Numbering parameter (integer)
m = Variable value, integer
n = Variable value, floating-point number
X = 2 Heating bath temperature
X = 4 Speed
X = 60 Interval time (1-99 seconds, 1 <= m >=99)
X = 61 Timer (1-199 minutes, 1 <= m >=199)
X = 62 Direction of lift (m=2-> lift up , m=1-> lift down)
NAMUR Function
Commands
IN_NAME Request designation
IN_PV_X Read actual value
X = 2,4
IN_SOFTWARE Request software Id-number,
date and version
IN_SP_X Read target value input
X = 2,4
OUT_SP_X m Set target value to m
X = 1,2,60,61,62
RESET Switch to normal operation
START_X Switch on appliance (remote) function
X = 2,4,60,61,62
STATUS Status output
0:Manual operation without interruption
1:automatic operation Start
ERROR z (z error number see table)
STOP_X Switch off appliance function. The variable
X = 1,2,60, 61,62 set with OUT_SP_X remains.
(without interruption)
Fig. 16
2009-04-15