27
KS 4000 i 1208
Configuration
The unit can be controlled from an external PC (using the dedi-
cated software labworldsoft) via the RS 232 C serial interface
fitted to the unit.
To increase safety when controlling the shaking unit from
a PC, enable the watchdog function for monitoring the
continuous serial data flow (see section watchdog func-
tion)
• The functions of the inteface lines between laboratory in-
strument and automation system are selected from the
specfied signals of the EIA-standard RS 232 C, corresponding
with DIN 66020 Part 1. The allotment of the bushing can be
taken from illustration.
• For the electrical properties of the interface lines and for the
allotment of the signal status, standard RS 232 C, corres-
ponding with DIN 66259 Part 1 applies
(see capture PC 2.1 cable).
• Transmission method:
Asynchronous signal trans-
mission in start-stop-operation
• Mode of transmission:
Fully Duplex
• Character format:
Character imaging acc. to data
format DIN 66022 for start-
stop-operation. 1 start bit;
7 character bits; 1 parity bit
[(straight (even)]; 1 stop bit.
• Transmission speed:
9600 bit/s
• Access method:
Data communication from
shaker to computer is only
possible on demand of the
computer.
Instruction syntax
Here applies the following:
• The instructionsare generally sent from the processor
Interface and outputs
(master) to the laboratory instrument (slave).
• The laboratory instrument exclusively sends on demand of
the processor. Even error codes cannot be spontaneously
communicated from the laboratory instrument to the proces-
sor (automatic system)
•Instructions and parameters as well as subsequent para-
meters are separated by at least
o n e
blank.
(Code: hex 0x20)
• Each individual instruction including parameters and data as
well as each reply are terminated with CR LF (Code: hex
0x0D and 0x0A) and have a maximum lenght of 80 charac-
ters.
• The decimal separator in a floating point number is the point.
(Code: hex 0x2E)
The above statements largely correspond with the recommen-
dations of the NAMUR-Assocation (NAMUR-recommendati-
ons for the design of electric plug connections for the analog
and digital signal transmission to labortory - MSR individual
units. Rev. 1.1).
Overview of the NAMUR-instructions
Abbreviations:
X,y =
numbering parameter (integer number)
m =
variable value, integer
n
=
value of variable, floating point number
X
= 1
Pt1000 medium temperature (external temperature
sensor)
X
= 2
temperature (incubations room)
X
= 3
safety temperature
X
= 4 speed
X
= 6
safety speed
X
= 50 Pt1000.60 medium temperature sensor offset in K
(-5.0 <= n <=+5.0)
X
= 52 incubations room temperature sensor offset in K
(-5.0 <= n <=+5.0)
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