Agilent Technologies TwisTorr 305 FS User Manual page 167

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.
Figure 46
TwisTorr 305 FS Remote Controller User Manual / 87-901-059-01
Technical Information
Profibus Option
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