Profibus Option; General; Installation; Configuration - Varian 969-8988 Bedienungshandbuch

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
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TECHNICAL INFORMATION
Meaning
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