Intec MLC 8000 Operating Manual page 149

INTEC GmbH
Lift controller MLC 8000
22/12/2016
Operating manual V2.0
only the shaft bus of both controllers must be connected together.
The following parameters must be set in addition:
- Group size (number of lifts inside a group)
- Group number
It should be ensured that any HSE within a lift group has a different number (= node ID of
the HSE on shaft bus).
Since the landing calls are also connected via ESE modules on shaft bus, all HSE modules
get all the information of operated landing calls and can operate them internally. Using a
special algorithm, the HSE modules distribute the landing calls to different lifts of the group.
In this algorithm the shortest possible waiting time for passengers is calculated. The call
allocation does not take place static, but is every 200ms recalculated so that the group
control can continually adapt new changing conditions (e.g. input of a new car call in a cabin;
interruption of the light barrier of a door during closure, ...) . So it is also guaranteed that all
landing calls are handled, even if a lift will shut down during operation.
In principle, up to 64 ESE modules can be connected to a CAN bus; with a larger number of
ESE modules the use of bus coupler CBC is required. However, the CAN bus is designed so
that the modules should be connected in a "linear structure". But this is not possible for a
group of 3 or more lifts with a separate shaft each. In these cases before reaching the 64
ESE modules already, bus couplers CBC should be used (recommended is the use of bus
couplers CBC already in groups of 2 lifts with 2 landing-call displays per floor).
Note also that the bus coupler modules CBC get different node numbers. The branch ID of
each ESE module depends on the node ID of the bus couple module CBC.
Through the bus couplers CBC the shaft bus is physically divided into various bus segments.
It is important that each bus segment is enclosed again on both sides with a terminating
resistor (120 Ohm each; see module description in the appendix) .
The power supply of the ESE modules and the bus coupler CBC can be done via a separate
24V power supply or by the 24V power supply of each individual lift controller. In this case, it
should be noted that the 24V power lines of each lift controller are to be decoupled from each
other via diodes.
The picture below shows the maximum configuration of a lift group (8 lifts, 8 bus couplers
CBC, 512 ESE modules)