System Overview ProSafe-COM 3.00
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The scan time of the ProSafe-COM scanning each Y-net module can be configured to be different for
each module. A scan of a full network is typically performed in less than a second.
ProSafe-COM
Figure 27: Status and event acquisition in Y-net (ProSafe-SLS)
5.6 ProSafe-SLS event storage
In a ProSafe-SLS safety system, events are stored with a milliseconds resolution, which yields a very
good understanding of cause and effect.
The discrete events are stored in the I/O and matrix panel control modules (MC-573, MC-576, MI-983 and
MO-986). The analogue input module (MC-562) does not record events.
The I/O modules buffer the events till these are read by the ProSafe-COM Y-net controller. The Y-net
controller (CN-956) buffers the events from all I/O modules in Dual Ported Memory. The ProSafe-COM
application will retrieve the event information from the DPM and sort the events in the overall ProSafe-
COM event list.
5.7 ProSafe-SLS forcing statuses
The digital output module MC-576 can be used to force statuses in a ProSafe-SLS safety system.
The fail-safe enable input of the MC-576 is typically driven by an override enable switch from the safety
system. Then it is possible to write maintenance or start-up override signals to the MC-576.
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Copyright Yokogawa Europe Solutions B.V.
TI48J01A00-00E Oct 2010
