6.3.1. Arrival Jam
When a carton leaves an upstream zone and is conveyed to its next downstream zone, this upstream zone
expects positive confirmation of carton arrival from the downstream zone. This communication occurs
automatically along the ConveyLinx network. If a new carton arrives at this upstream zone while this
upstream zone is waiting for a downstream arrival confirmation, the new carton will accumulate on this
upstream zone. If the upstream zone does not receive this confirmation within the Jam Timer interval, the
Ai2 Module will produce an Arrival Jam fault. Once an Arrival Jam occurs, the Ai2 Module will
automatically hold any new carton at the upstream zone for a pre-determined Auto Clear Time Timer value
and then resume normal ZPA function. By default, the Jam Timer and the Auto Clear Timer values are set
to 5 seconds for each. This condition will be indicated on the corresponding Sensor LED on the module
Carton 1 has left PE1 and is on its way
to PE2 and because PE1 is clear, Carton
2 is entering Zone 1
Carton 1 disappears but the Zone 2
motor continues to run for the Jam Time
period (5 sec. by default). During this
time Carton 2 arrives at PE1 but Zone 1
stops because Jam Timer is still timing
When the Jam Timer expires, the Sensor
LED blinks to indicate an Arrival Jam
and keeps blinking for the Auto Clear
Time (5 sec. by default). When Auto
Clear Time expires, the Arrival Jam is
reset and Carton 2 will release if Zone 2
is empty
PULSEROLLER ConveyLinx-Ai2 User's Guide - 1.7
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