Ziton ZP3, Руководство по установке и обслуживанию

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Chapter 7: Peer-to-peer 3 protocol
ZP3 Fire Control Panel Installation, Commissioning, and Maintenance Manual 115
nodes generate the message. Setting the general status event flag for each
Maestro node permits the remote panels to always send the status messages to
all of the Maestros at the same time.
Since the disable events no longer need to be sent for display only needs, each
panel volunteers the general status message to all the Maestros whenever a
change of disable status occurs on the panel. A 20-second delay period from the
last change of disable status is used to allow multiple disable changes to be done
prior to the status message being sent out.
The delay is cumulative, i.e. a 20-second period of no changes is required
before the status job is sent. Sending a status request message from Maestro,
which is processed immediately by the target panel, if it is not currently busy with
a status job, can shorten this period.
We recommend that the available communications filters be used to minimize the
network communications data traffic of commands as well as events to those that
are necessary. This is done to optimize the use of the bandwidth and buffer
sizes, which are limited by physical constraints. The panel has a display buffer of
a total of 484 events, including points, zones, and system status. On versions
prior to R3.11, once this buffer is full, information is no longer passed to Maestro
and panel events that are inter-panel I/O-mapped are not sent. However, on later
versions this restriction is removed by the use of an additional rotating
communications buffer. In the case of viewing disables some of the buffer space
may be occupied by other events that occurred since the last reset, including
reset status events from remote panels, if they were configured to send them.
In particular the disabled/enabled status of points and zones is now passed to
Maestro primarily by general status data blocks (controlled by the general status
filter). They no longer depend on the disabled event telegrams, which bypasses
the restriction in event buffer size and contents.
The panel automatically sends the general status data block to Maestro
20 seconds after a single change in its disablements, (or once 20 seconds after
the last of a series of disablements). Maestro also requests it automatically on
startup, after a reset, during a fascia view, or manually on request by the
operator by selecting Refresh, or Current Status (from Maestro Comms or
Maestro panel controls right-click).
Selecting Key 4, in the Keys options, can toggle the fetch disables command
filter setting. This filter enables/disables the Fetch Disables command to the
individual remote panels when the View Disables button is pressed on the local
(receiving) panel. At the same time, it also allows (or disallows) the Common
Disable LED to reflect the disables of the same remote panels.