Critical Systems, Alarms, and Handling Requirements
Critical alarm indicators and system functions require independent and redundant protection hardware and/or mechanical interlocks.
When you cycle power, wait at least 10 seconds before restoring the power to the panel after it has been turned off. Switching the power OFF and ON can damage the panel.
In the event the screen cannot be properly read, for example, if the backlight is not functioning, it may be difficult or impossible to identify a function. Functions that may present a hazard if not immediately executed, such as a fuel shut-off, must be provided independently of the panel. The machine’s control system design must take into account the possibility of the backlight no longer functioning and the operator being unable to control the machine or making mistakes in the control of the machine.
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LOSS OF CONTROL |
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oThe designer of any control scheme must consider the potential failure modes of control paths and, for certain critical control functions, provide a means to achieve a safe state during and after a path failure. Examples of critical control functions are emergency stop and overtravel stop, power outage and restart. oSeparate or redundant control paths must be provided for critical control functions. oSystem control paths may include communication links. Consideration must be given to the implications of unanticipated transmission delays or failures of the link. oObserve all accident prevention regulations and local safety guidelines. oEach implementation of this equipment must be individually and thoroughly tested for proper operation before being placed into service. oThe machine control system design must take into account the possibility of the backlight no longer functioning and the operator being unable to control the machine, or making errors in the control of the machine. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
For additional information, refer to NEMA ICS 1.1 (latest edition), "Safety Guidelines for the Application, Installation, and Maintenance of Solid State Control" and to NEMA ICS 7.1 (latest edition), "Safety Standards for Construction and Guide for Selection, Installation and Operation of Adjustable-Speed Drive Systems" or their equivalent governing your particular location.
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UNINTENDED EQUIPMENT OPERATION |
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oDo not use this equipment as the only means of control for critical system functions such as motor start/stop or power control. oDo not use this equipment as the only notification device for critical alarms, such as device overheating or overcurrent. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
The following characteristics are specific to the LCD panel and are considered normal behavior:
oLCD screen may show unevenness in the brightness of certain images or may appear different when seen from outside the specified viewing angle. Extended shadows, or crosstalk may also appear on the sides of screen images.
oLCD screen pixels may contain black and white colored spots and color display may seem to have changed.
oWhen the same image is displayed on the screen for a long period, an after-image may appear when the image is changed.
NOTE: Change the screen image periodically and try not to display the same image for a long period of time.
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SERIOUS EYE AND SKIN INJURY |
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The liquid in the LCD panel contains an irritant: oAvoid direct skin contact with the liquid. oWear gloves when you handle a broken or leaking unit. oDo not use sharp objects or tools in the vicinity of the LCD touch panel. oHandle the LCD panel carefully to prevent puncture, bursting, or cracking of the panel material. |
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Failure to follow these instructions can result in injury or equipment damage. |
If the panel is damaged and any liquid comes in contact with your skin, immediately rinse the area with running water for at least 15 minutes. If the liquid gets in your eyes, immediately rinse your eyes with running water for at least 15 minutes and consult a doctor.
