Signal Output
Instrument network (INET)
80
Figure 5-6
OUT IN
IN OUT
OUT IN
Sampler
S/ECM
Controller & Integrator
5890
HP 5890 SERIES II Gas Chromatograph
Typical INET Loop
Each INET must have one (and only one) device defined as the
controller. The controller is responsible for network configuration
when the network is first connected and powered on.
The controller then retains this status for subsequent loop operations,
maintaining its responsibility as network traffic manager. Note that
the device defined as controller usually has other capabilities.
The controller assigns addresses to each device on the loop, and
configures them to operate in orderly fashion. In addition, the controller
provides user access to the network configuration so desired changes can
be made.
For a typical analytical system, the default, automatic configuration
should be acceptable in most cases. For specific information regarding
