5 • Circuit Descriptions
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Art.-Nr.: 80116-271
04.06
Monitoring All measurement values are continuously compared with specified
setpoints and monitored. In the event of critical divergence the power
supply unit and generator are switched off and an error message out
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put.
Besides the parameters necessary for the surgical effects, the oper-
ating voltages are also measured and monitored.
The inside temperature of the unit is additionally measured. The
speed of the circulation fan is controlled accordingly.
User Interface (control panel)
The most powerful processor (Power PC) in the VIO system can be
found on the control panel. It operates the display as well as the but
-
tons and displays on the front of the unit. It is the master unit for the
ERBE Communication Bus (ECB). The control panel is used to log on
all the assemblies, e.g. the HF module, APC
2, smoke evacuator,
footswitches and all the sockets, and also to request the issue of sta
-
tus messages on a cyclical basis. This means that there is always an
overview of the components involved in the system and their state
(off, on, error, etc.).
The activation of one or more assemblies is also controlled from the
Power PC. It receives activation signals from the finger or footswitch
-
es, then issues the appropriate commands for switch-on or off. The
status messages (e.g. current contact resistance of NESSY 2) are
also used to decide whether activation can start or whether it is nec
-
essary to switch off the unit due to user error or a malfunction.
ECB (ERBE Communication Bus)
The ECB is based on the CAN bus system. The CAN bus was devel-
oped for the automotive industry and is also widely used in other sec-
tors due to its structure and safety characteristics.
In the VIO system all subsystems are connected to the control panel
via the ECB.
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