Interface And Outputs - IKA KS 130 control Operating Instructions Manual

Interface and outputs

The device is equipped with a 15-pin SUB-D connector on the rear side of the
device. The pins are assigned in operation with analog and serial signals.
Analog autput
Voltage values for the speed measurement quantify are present on the analog
pins.
(10) Analog GND
(15) Speed measurement value 100mVDC / 100 1/min
RS 232 C serial interface
The serial assignment of the socket can be used to control
the device externally by means of a PC and a suitable
application program.
Configuration of the serial RS 232 C interface
• The function of the interface line between the laboratory
device and the automation system is a selection of the
signals specified in EIA Standard RS 232 C, corresponding
to DIN 66020 Part 1. For the assignment of the signals,
please refer to the illustration.
• Standard RS 232 C applies to the electronic properties
of the interfaces and the assignment of signal states in
accordance with DIN 66259 Part1.
• Transmission procedure: Asynchronous character
transmission in start-stop mode
• Type of transmission: full duplex
• Character format: Character creation according to the data
format in DIN 66022 for start-stop mode. 1 start bit; 7 character
bits; 1 parity bit (even); 1 stop bit.
• Transmission speed: 9600 baud
• Data flow control: RTS/CTS hardware handshake
28
• RTS: (Pin 7) LOW (positive tension) / PC may send
• RTS: (Pin 7) HIGH (negative tension) / PC may not send
• CTS: (Pin 8) LOW (positive tension) / PC recipient
• CTS: (PIN 8) HIGH (negative tension) / PC not recipient
• Access method: Data communication from laboratory instrument to processor is
only possible on demand of the processor.
Instruction Syntax
Here applies the following:
• The instructions are generally sent from the processor (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 instru-
ment to the processor (automatic system).
• Instructions and parameters as well as subsequent parameters are separated by
Analog GND
at least one blank. (Code: hex 0x20)
100mV = 100 1/min
• 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
RTS
length of 80 characters.
RxD
• The decimal separator in a floating point number is the point (Code: hex 0x2E).
TxD
CTS
The above statements largely correspond with the recommendations of the
NAMUR-Association. (NAMUR-recommendations for the design of electric plug
connections for the analog and digital signal transmission to laboratory- MSR
individual units. Rev. 1.1)
Analog GND
100mV = 100 1/min
Overview of the NAMUR-Instructions
RS232_GND
Abbreviations:
X,y = numbering parameter (integer number)
M = value of variable, integer number
n = value of variable, floating point number
X = 4 speed
X = 6 speed range limit ("safety" speed)