|
Color
|
Device Type
|
Typical Function
|
Examples
|
|
|
Pushbutton |
Emergency Stop, Stop,
Off |
Emergency Stop button,
Master Stop button, Stop of one or more motors. |
| |
|
|
|
Pilot Light |
Danger or alarm,
abnormal condition requiring immediate attention. |
Indication that a
protective device has stopped the machine, e.g. overload. |
| |
|
|
|
Illuminated Pushbutton |
|
Machine stalled because
of overload, etc. (the color RED for the emergency stop actuator
shall not depend on the illumination of its light). |
|
|
|
Pushbutton |
Return, Emergency
Return, Intervention - suppress abnormal conditions. |
Return of machine
elements to safe position, override other functions previously
selected. Avoid unwanted changes. |
| |
|
|
|
Pilot Light |
Attention,
caution/marginal condition. Change or impending change of
conditions. |
Automatic cycle or
motors running; some value (pressure, temperature) is approaching
its permissable limit. Ground fault indication. Overload that is
permitted for a limited time. |
| |
|
|
|
Illuminated Pushbutton |
Attention or
caution/Start of an operation intended to avoid dangerous
conditions. |
Some value (pressure,
temperature) is approaching its permissable limit; pressing button
to override other functions previously selected. |
|
|
|
Pushbutton |
Start-On |
General or machine
start; start of cycle or partial sequence |
| |
|
|
|
Pilot Light |
Machine Ready; Safety |
Indication of safe
condition or authorization to proceed. Machine ready for operation
with all conditions nornal or cycle complete and machine ready to
be restarted. |
| |
|
|
|
Illuminated Pushbutton |
Machine or Unit ready
for operation/Start or On |
Start or On after
authorization by lights; start of one or more motors for auxiliary
functions; start or energization of machine elements. |
|
|
|
Pushbutton |
No specific function
assigned |
Shall be permitted to be
used for any function except for buttons with the sole function of
Stop or Off; inching or jogging. |
|
|
|
Pushbutton |
Any function not covered
by thee above. |
Control or auxiliary
function not directly related to the working cycles. |
| |
|
|
|
Pilot Light |
Normal Condition
Confirmation |
Normal pressure,
temperature. |
| |
|
|
|
Illuminated Pushbutton |
Confirmation that a
circuit has been energized or function or movement of the machine
has been started/Start On, or any preselection of a function |
Energizing of auxiliary
function or circuit not related to the working cycle; start or
preselection of direction of feed motion or speeds. |
|
|
|
Pushbutton |
Any function not covered
by the above colors |
|
| |
|
|
|
Pilot Light |
Any function not covered
by the above colors |
|
| |
|
|
|
Illuminated Pushbutton |
Any function not covered
by the above colors |
|