INFICON SKY CDGxxxD (RS232C) - Manual (Page 2)

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tira49e1-a (2010-02) RS232C.cp
The RS232C Serial Interface permits the communication between the digital
INFICON Capacitance Diaphragm Gauge and
• an INFICON Vacuum Gauge Controller (VGC series) or
• another appropriate controller.
The RS232C Serial Interface integrated in the Capacitance Diaphragm Gauge
allows to digitally transmit measurement values and information on the gauge
status as well as to make parameter settings.
Caution
Caution: data transmission errors
Any attempt to simultaneously operate the gauge via the RS232C
Serial Interface and a fieldbus interface (DeviceNet or Profibus) or the
diagnostic port may result in incorrect data and data transmission
errors.
Therefore, it is inadmissible to simultaneously operate the gauge via
the RS232C Serial Interface and DeviceNet, Profibus, or the
diagnostic port.
The RS232C Serial Interface is used in duplex operation. The gauge continuously
(approximately every 20 ms) transmits a nine byte send string without request.
Instructions to the gauge are transmitted via five-byte receipt strings.
• binary
• 8 data bits
• 1 stop bit
• no parity bit
• no
handshake
• 9600 Baud
• TxD Pin 13
• RxD Pin 14
• GND Pin 5
(sensor cable connector)
General Information
Functional Principle
Data format
Transmission rate
Pin assignment