Allen-Bradley ClutchBrake PLC-5 Series - Terms and Abbreviations

Using This Manual P–3
Publication 65566.5.1 - October 1996
You should become familiar with these abbreviated terms. For
complete definitions of clutch/brake terms, refer to ANSI
B11.1-1988 section 3.
Category Term Definition
Hardware active pin run station wiring that provides a signal to indicate that pairs of run buttons are active, not replaced by
dummy plugs (optional feature)
braketime
monitor
a solidstate device that monitors press stopping time at any point in the stroke
buttons palmtype pushbutton switches used by an operator for starting and stopping the press
dummy plug jumpers used in place of a run station when removing a run station from the press control circuit
resolver a solidstate device that detects and transmits the angular position of the press drive shaft
run station a press operator's point of operation that typically contains a pair off pushbuttons to start the press
Operating Mode continuous lets the control system maintain continuous stroking after an operator starts the press
inch lets an operator move the press intermittently by pressing and releasing a pair of inch buttons
micro inch the same as Inch but at a slower speed. Requires a separate drive assembly and a separate set of outputs
off disables operation of the clutch/brake control system when not in operation
single stroke lets the operator run one complete press stroke, usually started at the top
Press Cycle antitiedown prevents the press from starting if the system detects that an operator has tied down a RUN or INCH button.
After all buttons are released, the operator must press both RUN or INCH buttons at the same time.
downstroke the part of the press cycle when the press travels from the neartop to the nearbottom position
interrupted
stroke
lets the operator stop the press quickly by releasing a RUN button during a downstroke in singlestroke
or continuous mode.
bottom the part of the press cycle when the die is closed
near top the part of the press cycle when the press is at the top of its stroke
onthehop option that lets an operator continue stroking in singlestroke mode by pressing run buttons on each upstroke
stopontop a command designed to stop the press at the top of its stroke
strokeand
ahalf
a method to initiate continuous stroking where an operator holds down the run buttons for 11/2 press cycles
upstroke the part of the press cycle when the press travels from the nearbottom to the neartop position
Rotary Cam RCLS  a switch that rides a rotating cam to provide information on the position of the press drive shaft
Limit Switch antirepeat a part of the control system designed to limit press operation to a single cycle if the actuating means is held
actuated. Antirepeat requires the release of all means of actuation before a repeat stroke can occur
brake monitor a part of the control system designed to prevent the next stroke if stopping time or distance exceeds a preset
takeover a part of the control system designed to allow upstroke without the operator holding the run buttons
Valves clutch valve the main valve that controls the flow of air to the clutch/brake mechanism
auxiliary valve valve used in addition to the clutch valve such as for dump, soft" clutch/brake, etc
dump valve the valve that vents a large volume of air to/from the clutch/brake mechanism
solenoid valve an on/off electricallydriven valve
valve stem
feedback
a signal from a switch on the valve stem that tells when the valve is open or closed
fault detection
(for valves)
external: designed so a signal from an external valvestem switch detects when the valve is malfunctioning
internal: the valve is designed to turn itself off in the event of valve failure
Terms and Abbreviations