Technical Information Profibus Option - Agilent Technologies Turbo-V 81-AG Notice De Mode D'emploi

17 Technical Information
Profibus Option
The two machines continuously share I/O data with the relative bus,
and interact each other only in following conditions:


As a general rule, unrecoverable communication errors make each
machine to jump to the state immediately following the power-on
state (WAIT_PRM or SRC_ADDR)
Message Mapping
The communication is based on the continuous data exchange
capability of the ProfiBus standard, where the master sends
continuously the entire slave configuration and reads back the entire
slave status.
For this purpose one Input (from slave to master) and one Output
(from master to slave) buffers are provided. All the needed
parameters are mapped inside each buffer.
The following tables summarise the ProfiBus parameter access,
related to the corresponding windows serial protocol (for this
protocol please refers to the serial interface paragraph).
The interface doesn't any scaling operation on the read/written
parameters. It acts only as a gateway between the ProfiBus network
and the pump's controller serial interface. As a consequence of this,
the scale and the meaning of some parameters depends directly to
the specific model of Turbo Pump controller connected to the
interface.
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ProfiBus Data Exchange is suspended (static diagnosis activated)
if the internal serial link in not established
Internal serial link Data Exchange is suspended (only for output
data) if the ProfiBus State machine is not in Data Exchange mode
Turbo-V 81-AG Rack Controller User Manual / 87-900-986-01 (I)