Use Video Cameras

It may seem odd to use video cameras to capture activity of conveyance equipment but their use has two benefits. One is that large transit organizations or airports may be liable for accidents involving passengers using the conveyance equipment. Video provides a record of what exactly happened to cause the accident and helps in determining any liability. The second benefit is that video can also help in managing the performance of the equipment. If the equipment stops or has a fault, video before and after the event can be used to help diagnose the problem.

Relevant Conveyance Data

The data that can be acquired will be limited by the configuration of the controller. Controllers for conveyance equipment are Programmable Logic Controllers (PLCs) and are configured using modules for different aspects of the equipment. Of course, alarms would be a top monitoring priority. Table

8.1 shows some basic (nonexhaustive) data that should also be collected.


Acquiring relevant data from the conveyance equipment is one thing. Transforming the data into useful information is another. It involves identifying individuals or groups within the organization that would be interested

Table 8.1

Elevator Data


Car position

Running Up


Running Down

Car Load

Sleep Mode

Door Status

Out of Service

Total number of door openings

Emergency Stop

Number of runs per car or call

Chain tension

Up and down hall cards

Motor speed

Out of Service

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in the information, what their key performance indicators are, and displaying the information in a way that a user can perceive the information, comprehend its importance, and project what needs to be done based on the information.

Typical monitoring applications include:

b Real Time Status of Equipment: This should be an enterprise or summary view of the equipment with the capability to drill down to view a schematic of a particular piece of equipment with all current data points.

b Alarm Management: This only works if an alarm management plan is developed for how the alarms will be prioritized and classified. Underlying the rules should be an assessment of the potential consequences of each alarm. For each alarm determine the response of the building technician or operator. Identify the roles and responsibilities of each person involved in responding, as well as the work process from alarm notification to resolution and documentation. Hierarchy rules for escalation should also be included. This application should involve integration into a work order system.

b Preventative Maintenance: This involves an application with a Facility Management System. Data on the preventative maintenance of the conveyance equipment would be gathered with work orders automatically processed upon key preventative maintenance dates or events.

b Equipment Usage and Traffic Patterns: The system should monitor and trend the usage of the equipment by hour, day, and month, and track this information against the people or passengers using or occupying the facility.

b Operating Conditions: The system should monitor the quality of power to the equipment, environmental conditions, and security alarms for the machine rooms, as well as energy consumption.

Once you appreciate the role of conveyance equipment in building operations, the monitoring of the equipment will be critical in improving building performance.

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