beautypg.com

8 user parameter data 3.9 types of communication – INFICON SKY CDGxxxD (Profibus) User Manual

Page 11

background image

tira54e1-a (2009-01) CDGxxxD.cp

11

Depending on the pressure unit setting (≙ data unit), the following configuration
string has to be transmitted to the gauge (parameter data in hexadecimal format):

Data string (hex)

Pressure unit

00 00 00 10 01

COUNTS

00 00 00 13 01

Torr

00 00 00 13 08

mbar

00 00 00 13 09

Pascal


CDGxxxD works according to the Profibus DPV1 specification and can be
addressed in cyclic or acyclic data traffic (

→ [4]).

Acyclic data traffic should be used to make device or process specific settings such
as definition of the Safe Values, Safe States etc. or for reading or writing of rarely
used attributes.

Cyclic data traffic is used for continuous exchange of the required process para-
meter values, i.e. pressure value and status indications. A number of standard
telegrams are available for cyclic data traffic. They can be selected according to
requirements (

→ section "Cyclic Message Telegrams").


3.8 User Parameter Data

3.9 Types of

Communication