Specifications
Application Note 105U-G-PR2 Profibus Master
Issue 1.2 – May 2005
©ELPRO Technologies Pty Ltd
Page 4 of 13
app_105U-G_PR2_1.2.doc
Infrastructure
• The gateway has an internal database made up of approximately 4300 16 bit registers.
• Values from remote radio sites come in via the “Radio Interface” and are stored in the “I/O
Database” which are then written to the ‘Fieldbus Interface”.
• Values that are read from the ‘Fieldbus Interface” are stored in the “I/O Database” which
are then mapped out the “Radio Interface” to remote radio units.
• The Onboard Digital I/O’s are linked to register locations in the “I/O Database” which can
be read or written to the “Fieldbus Interface” or mapped to or from the “Radio Interface”.
The examples shown in the Fieldbus Config has two mappings, one read mapping of two bits and
one write mapping of two bits.
105U
RADIO
INTERFACE
I/O
DATABASE
FIELDBUS
INTERFACE
PLC
ONBOARD
I/O