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ACT2000
7 GLOSSARY
Term Definition
RUN Command A discrete 24 VDC signal that enables the ACT2000 extension rod to
move.
RESET Command A discrete 24 VDC signal that causes the ACT2000 internal program
(firmware) to jump to the beginning.
Controller A user-provided computer that executes commands to the ACT2000
and accepts analog and discrete feedback.
Position Demand A 4mA to 20mA signal that commands the ACT2000 to move to a
certain position. The signal is scaled with SPAN.
Position Demand Feedback A 4mA to 20mA signal that communicates the actual ACT2000
position to the controller.
Motor Current Feedback A 4mA to 20mA signal that is proportional to the ACT2000 motor
current. The signal is scaled with Max. Force.
FAULT alarm A discrete signal from the ACT2000 that communicates an internal
failure. The controller will see an open circuit when a FAULT alarm is
active.
OVERTEMP alarm A discrete signal from the ACT2000 that communicates an internal
over temperature; electronics or motor. The controller will see an
open circuit when OVERTEMP alarm is active.
HOME A mechanical rigid stop at which the ACT2000 calculates position
from. HOME is found at start-up during Homing sequence. The
ACT2000 defines HOME when the motor current exceeds the
HOMING FORCE and velocity is zero. HOME is defined as 4mA
position demand.
Homing sequence When the ACT2000 extends or retracts to find a rigid mechanical
stop.
SPAN Maximum distance from HOME. SPAN is defined as 20mA position
demand.
STOP position A user-defined position between HOME and SPAN that the ACT2000
travels to upon loss of RUN or position demand signal.
Maximum Velocity A user defined maximum velocity in inches per second.
Maximum Homing Force A user defined maximum homing force output setting. The motor
control electronics uses this setting to determine the maximum motor
current in the Homing sequence.
Maximum Holding Force A user defined maximum force while in the Holding Motor Current
state.
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