Alicat PROFIBUS - Manual (Page 8)

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4.4 Diagnostic
The PROFIBUS unit will send a diagnostic telegram if an over range condition
is encountered. A diagnostic telegram with extended diagnostics will be output.
Following the standard six octet header will be two octets. The first is the
number of the extended diagnostic octets (0x02). The second octet will be a
copy of the status byte that is in the reading and has the same interpretation.
5 RS-232 Port
In all states of PROFIBUS communications, the RS-232 port is available to
allow access for simple diagnostics or to query state. There are two types of
commands available to the user through the RS-232 diagnostic port: Escape
Commands and Unit Commands.
Note: The RS-232 port is not needed for PROFIBUS communication and is
only provided for convenience.
5.1 Configuration
Although the connector on the side of the PROFIBUS unit looks like a
standard RS-232 DB9, it is not. The connections to this connector are detailed
in the standard Alicat operating manual and on pages 9-10 of this bulletin.
Configuration of the computer port is also described in the standard Alicat
Manual. Basic configuration is repeated here for convenience.
Baud Rate 19200
Stop Bits 1
Data Bits 8
Stop Bits 1
5.2 Escape Commands
Escape commands begin with the escape key and end with a return. The
three escape commands are: version; print current data frame; and return
PROFIBUS state.
The version command is executed with . This will return the
revision, date and time that the software in the interface was last compiled.
The print current data frame command is executed with
. This
will return the last streamed data frame.
The , or any other escape command executed, will return the state
of the PROFIBUS interface.