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Appendix
9006 Hybrid Control for RollerDrive
Idler rollers Non-powered rollers attached to a RollerDrive typically via O-rings or multi-rip
belts.
Jam protection A method of protecting packages that are possibly jammed in a zone. If the
9006 detects a jam or obstruction at the downstream end of the
zone, it sends an accumulation signal to the upstream zone preventing a
buildup of accumulation pressure.
Jog RollerDrive runs continuously as long as the command is set. If jog mode is
activated, the 9006 disregards ZPA or photoeye signals.
N/C No care; affects nothing
NPN-override DIP switch 4 is for upstream, DIP switch 5 is for downstream.
O-rings O-rings made of materials such as polyurethane that connect RollerDrives to
their associated idler rollers.
Perm Permission: Signal to upstream zone to discharge zone (send load).
Photoeye An ON/OFF sensor that uses light to sense the presence of objects. If the light
beam is broken, an object is present. Usually the light is reflected back to the
sensor via a reflector placed on the opposite side of the conveyor frame from
the sensor itself. The 9006 can use either NPN type or PNP type
photoeyes. NPN sensors indicate an active state by a grounded connection
being made (NPN mode) or a 24 VDC connection being made (PNP mode).
Req Request from upstream zone to discharge zone in downstream direction.
RollerDrive One of several types of DC powered rollers manufactured by Interroll
Corporation.
Singulated release A method of releasing packages where packages are allowed into downstream
zone only after the trailing edge of the package currently occupying that
downstream zone clears the zone's downstream edge sensor.
Si
ngulation DIP switch 3 chooses either standa
rd or enhanced singulation, significant for all
zone types except smart I/O dependent.
Upstream The opposite of "downstream" (see definition). Typically, the zone to the right of
another zone.
Zero motion hold For DC motors, zero motion hold is a method of holding a motor by applying a
small amount of current to the motor winding leads. When the 9006
is commanded to stop and accumulate, the braking action is twofold. First, the
motor/package is stopped using dynamic braking. Second, the motor is held in
place by zero motion hold. In this state the 9006 will resist being
rotated by outside forces.
Zone A segment of conveyor typically comprised of one RollerDrive and multiple idler
rollers interconnected by O-rings or some other device for driving the idlers.
ZPA Zero pressure accumulation: The process of moving packages on a conveyor in
such a manner that they do not touch each other (also see "ZPA technology",
page 7).
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