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PROFIBUS OPTION
General
The ProfiBus option allow to communicate with the
controller as ProfiBus DP slave device.
The option works as a bi-directional bridge between the
ProfiBus network and the Varian turbo controller
internal link. The interface provides input data
(measures) and output data (commands) to the
controller, and in addiction provides standard and user
related diagnostics, in order to allow the user to
manage the exceptions.
Installation
This option is factory installed.
The ProfiBus connector pin-out is reported in the
following figure. Please in order to obtain best
performance use ProfiBus certified cables.
ProfiBus connector
Configuration
Before power-on the controller set the ProfiBus address
by the 2 rotary switches.
Up to 126 different addresses (from 0 to 125) can be
selected. The address value sets by the 2 switches is
expressed in hexadecimal notation, so value from 00 to
7D are permitted; this setting is read by the interface
during the power-on phase, so any change of the
switch position after the power-on is ignored.
Software operation and state machine
From the software point of view, the interface can be
seen as two devices (one for ProfiBus and the other for
the internal link) linked together.
Each device has its own state machine to manage the
device operation.
PROFIBUS STATE MACHINE
Status
POWER_ON
Interface set-up
WAIT_PRM
Wait for parameterisation from the master
WAIT_CFG
Wait for configuration from the master
DATA_EX
Regular data exchange
97
TECHNICAL INFORMATION
Meaning
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