In conjunction with SCADA supervisory control systems and user interface/HMIs: SCADA/HMIs provide more specific machine/process status data stack lights complement them by providing visual/audible feedback away from the machine operator console.Warning indication and machine fault management.Uptime & downtime monitoring ( overall equipment effectiveness) is a very common use for these devices. Productivity monitoring (often rate-based machine output management with parts-per-hour displays).
#OSHA LIGHT BLUE COLOR CODE MANUAL#
Manual intervention is possibly necessary in blue and white conditions.ĭemonstration by technician in Colgate Palmolive of how the Andon Button worksĬommon applications include, but are not limited to: Machine operator intervention is typically required in red and yellow machine states, as these are normally errors or warnings. IEC60073 addresses machine state colour-coding & acoustic alerting, which can be applied to devices including panel pilot lights & stack lights. Optionally an audible alarm buzzer, typically in the range of 70–105dB, may be added to alert machine operators to high priority conditions.WHITE: User-defined conditions to a specific machine, often related to productivity monitoring.BLUE: External help request, where an operator might be requesting raw materials, scheduling or maintenance personnel assistance.GREEN: Normal machine or process operation.YELLOW: Warnings such as over-temperature or over-pressure conditions.RED: Failure conditions such as an emergency stop or machine fault.Stack lights are used in a variety of machines and process environments specific colour-coding is assigned by the system designer.Ĭommonly used colour codes for machine state conditions include: Stack lights are available for all types of industrial environments including washdown ( IP65) and explosion proof. Some units support fieldbus networked control through popular industrial networks such as Modbus, DeviceNet, Profibus, CAN-Open or ASi.įlashing control may be provided by the stack light's internal circuitry or externally controlled with timers or logic controllers.
#OSHA LIGHT BLUE COLOR CODE PC#
Stack lights are passive devices that may be controlled directly by programmable logic controllers, distributed control systems, PC control systems or hardwired to machine controls such as timers, sensors and latching relays.ĭiscrete signals activate illuminated segments at common industrial control voltages (including 12Vdc, 24Vac/dc, 115Vac, 230Vac). Segments in any combination of (typically) red, yellow, green, blue or clear white are actuated independently and are either off, steadily lit, or flashing. A stack light will typically have up to five differently coloured segments to indicate various conditions on the machine or process. Stack lights are generally columnar structures in a variety of shapes, placing colour-coded indicator segments on top of one another in a "stacked" orientation.
Stack lights typically use incandescent, LED or xenon-type strobes as their illumination source. Stack lights are used in similar applications to beacon lights/strobes, however the information they typically display encompasses more machine/process conditions. They are a form of andon: a manufacturing system that identifies errors as they happen. Stack lights (also known as signal tower lights, indicator lights, andon lights, warning lights, industrial signal lights, or tower lights) are commonly used on equipment in industrial manufacturing and process control environments to provide visual and audible indicators of a machine's status to machine operators, technicians, production managers and factory personnel. Stack light in automated production for in-line quality inspection
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