IDENT-I • IVI-KHA6-4HRX, IVI-KHD2-4HRX
Serial interface/DIP switches
Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany
epperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com
Date of issue 27.08.2001
11
5 Serial interface/DIP switches
The RS 232 serial interface is connected via the built-in 9-pin sub-D-connector. Alter-
natively, RS 422, RS 485 or 20 mA interfaces can be connected via the terminals.
The interface standard is selected by setting DIP switches S7 and S8.
Since the control interface unit incorporates only one serial interface, which operates
with different drivers and receivers for the various standards, only one standard inter-
face may be connected at any one time.
The transmission speed (baud rate) is set with DIP switches S1, S2 and S3 as follows:
Data is transmitted using one start bit, 8 data bits, one stop bit and no parity bit. The
control interface unit also responds to one-and-a-half and two stop bits.
In the basic fixed-code operating mode, the following data formats are possible:
8 data bits, no parity
7 data bits, even parity
7 data bits, odd parity
To set these transmission formats, the command RST (in upper or lower case, but not
in combination) must be sent to the control interface unit immediately after power on.
The control interface unit adjusts automatically to the required format.
In binary mode, the number of data bits to be transmitted is always 8. If 7 data bits are
set, the control interface unit will return the error message “M5” in response to the
command “SB”.
Standard S7 S8
RS 232 / RS 485 open open
RS 232 / RS 422 open close
20 mA-current loop close open
Baud-rate S1 S2 S3
300 Bd open open open
600 Bd open open close
1 200 Bd open close open
2 400 Bd open close close
4 800 Bd close open open
9 600 Bd close open close
19 200 Bd close close open
not defined close close close
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