TECHNICAL NOTE
MOTION APPLICATION ENGINEERING GROUP
Yaskawa Electric America - 2121 Norman Drive South – Waukegan IL 60085
(800) YASKAWA - Fax (847) 887-7280
11/23/2005 34 of 34 eng/05.055/MCD
Machine Interlocks
Machine interlocks are critical to allow the controller code to operate within the mechanical
limitations of the machine and assure safe, reliable, high performance operation. Machine
interlocks include conditions for sequencing operations where components may interfere with
each other, peripheral components interlocking such as labelers or heater controls, upstream and
downstream systems interlocks as well as safety system interlocks.
Axis Enable Interlocks
To prevent alarms or warnings, the machine safety circuit and amplifier power should be verified
before attempting to enable an axis. This is done in the individual axis low scan drawings with
the axis normal condition to enable an axis. By verifying the controller an amplifier is ready the
power will be on the amplifier and the communications will be synchronized, therefore the
controller will be able to enable the axis successfully.
DWG L20.01
Automatic Mode Interlocks
Before a machine can enable, the state all the axes must be normal and enabled, the safety
circuit must be intact and no faults can exist.
DWG L10.01
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