schmersal bp408, Руководство по установке

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30 Installation manual of system “bp408” - The control system “bp408”
5.3 Decentralised lift control system
The control system bp408 is a decentralised control system. This means the
“intelligence” is distributed across the devices connected and no longer at just a
centralised location. CANopen lift application profile CiA 417 (www.CANopen-
Lift.org) forms the basis for the decentralised lift control system. Communication
between individual assemblies of the group of lifts takes place via this application
profile that is standard worldwide. The connected assemblies have a complete
functional image and thus can independently make a multitude of decisions. Thus,
open modular systems are possible, which can undertake very complex control
tasks.
5.4 The group system
Modern group control systems are equipped with efficient 32-bit processors. They
can assess a large amount of information of the entire group of lifts in a short time
and based on that, take the correct decision for group mode.
The group control program ensures smooth
lift operation in groups of two to eight lifts.
The application profile CiA 417 based on
CANopen lift forms its basis. Data and
commands of all components are made
available on the bus in a standard way.
Every group computer is thus in the position
to independently decide the sequence in
which individual calls must ideally be
implemented and the group member that
implements them. A higher-level master computer is not necessary for the group
function but can be used to increase the efficiency of the group by a few special
functions, e.g. load-dependent evacuation of all lifts within a building with
emergency power or in case of fire or automatic statistical evaluations for
determining group parameters.
The hall calls are entered via bus nodes, which can be located in the hall call panels
or in the control cabinet. These nodes assess the incoming signal and sends the
call with information about its direction, priority, destination etc. on the CAN bus to
all group members at the same time.
In the group control system, the algorithms of the call controller decide with the
help of the set parameters (e.g. park mode, number of parking lifts on the mail level,
priority calls per floor etc.) the sequence in which and from which lift the individual
destinations must be approached. If a lift is no longer part of group operation
because it has been switched to inspection, for example, during maintenance, this
information is also sent to the remaining group members immediately and can be
taken into account in calculations. If several lifts can implement a call at the same
Figure 12:
Group status in bp408