Interfaces And Outputs; Configuration - IKA HBR 4 digital Mode D'emploi

The device can be operated in "Remote" mode via an RS 232 using
the laboratory software Labworldsoft
Note: Please comply with the system requirements together with
the operating instructions and help section included with the soft-
ware.

Configuration

The RS 232 serial interface can be used to operate the device using
a computer and a suitable user program (Labworldsoft
In order to increase safety when operating the HBR 4 control
using a PC, a watchdog function can be activated which monitors
the continuous data flow (see section entitled: "Watchdog func-
tion").
• The functions of the interface circuit between the laboratory de-
vice and the automation system are a selection from the signals
specified in the EIA standard RS 232 C as per DIN 66020 Part 1.
The assignment of the different signals can be seen in the image.
• Standard RS 232 C, corresponding to DIN 66259 Part 1 is valid
for the electronic characteristics of the interface circuits and as-
signment of signal states.
• Transmission process: asynchronous character transmission in
start-stop operation.
• Transmission type: full duplex
• Character format: character composition according to data for-
mat in DIN 66022 for start-stop operation. 1 start bit, 7 charac-
ter bits, 1 parity bit (even), 1 stop bit.
• Transmission speed: 9600 bit/s
• Data flow control: hardware handshake
• Access method: data transmission from the device to the com-
puter only occurs after a request from the computer.
Summary of available NAMUR commands
Abbreviations used:
X,y =
m =
n =
X = 1
X = 2
X = 3
X = 4
X = 52
X = 54

Interfaces and outputs

.
®
).
®
numbering parameter (integer)
variable value, integer
variable value, floating-point number
Temperature of external sensor
Bath temperature
Bath safety temperature
Speed
External PT 1000 temperature sensor offset in K (-3.0 <= n <=+3.0 )
Error 5 response time in minutes (1 <= n <= 30)
Command syntax
The following points should be noted for the instruction set:
• Commands are generally sent from the computer (master) to the
lab device (slave).
• The device sends only at the computer's request. Even fault in-
dications cannot be sent spontaneously from the device to the
computer (automation system).
• Commands and parameters, as well as consecutive parameters,
must be separated by at least one space (code: hex0x20).
• Each individual command (incl. parameters and data) and each
response are terminated with Blank CR LF (Code: hex 0x0D and
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 recommen-
dations 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).
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