Agilent Technologies TV 301-P, Руководство пользователя

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Technical Information
Profibus
204/224 TV 301-P Navigator Controller User Manual / 87-901-001-01 (B)
Figure 20
Table 9 Internal link state machine
Status Meaning
Power on Interface set-up
Src addr Search for the controller serial address
Identify Identify controller model and protocol
Data ex Regular data exchange
The two machines continuously share I/O data with the relative bus,
and interact each other only in following conditions:
ƒ
ProfiBus Data Exchange is suspended (static diagnosis activated)
if the internal serial link in not established
ƒ Internal serial link Data Exchange is suspended (only for output
data) if the ProfiBus State machine is not in Data Exchange mode
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)