Car Controller - O. Thompson Microflite Ultra 2000 Installation & Adjustment Manual

Microflite Ultra 2000
Section 13 Sequence of Operation & Troubleshooting
13.1

Car Controller

Distributed Processor Control
The car controller is a distributed microprocessor-based system. The primary advantages of a
distributed microprocessor system are a reduction in traveling cable wires and redundant processors
working together to decrease processing time. This reduction in processing time provides quicker
overall system response to car and dispatching decisions.
The processors are located in the car controller, on the car top, and in the car station (optional car top
mounting is available). Each processor is totally dedicated to processing inputs and outputs at its
location and reporting the status to the main processor located in the controller for system
management and speed curve generation.
TM
The remote processors communicate over the LonWorks neuron network. The neuron network
communicates between processors at 78 kilobaud to provide high speed data transmission to the
main processor. The communication between the processors is done over two twisted shielded wires,
connected in a "daisy chain" fashion from the MPU, or Main Processor Unit, to the Car Top Encoder
Board, and then to the Intelligent Car Station Board. The shields on the cables must only be
connected on one end, as shown in the figure below.
NOTE: It is important to connect the communication network as shown to prevent erroneous
communication faults from occurring.
The main processor is a Motorola 68306 32 bit processor that processes the information sent by the
remote processors and sends signals to the remote processors to turn on devices connected at the
remote locations. The main processor also generates a digital pattern that is sent to the motor drive
system to control the acceleration, deceleration, and stopping of the car.
Revision: AA 2.2 Printed 03 - 15 - 03 13 - 1