What causes fault code ASRS-TRAF1 (AS/RS Traffic Control — Aisle Interlock Violation)?

Aisle interlock sensor failed — not detecting crane presence in aisle. WCS traffic manager software lost communication with one or both cranes. Personnel access gate opened while crane is in the aisle — safety interlock activated. Crane overran the aisle boundary — positioning system did not stop crane at aisle limit. Manual mode operation bypassed traffic management interlocks

How do I fix fault code ASRS-TRAF1?

Verify both cranes' positions — confirm no actual collision risk before proceeding. Check aisle boundary sensors — each aisle should have presence detection at entry/exit. Verify WCS communication to all cranes — check network connections. If personnel access gate triggered, walk the aisle to verify no personnel present before clearing. Do NOT override traffic interlocks without physically verifying the aisle is clear. Reset traffic violation from WCS operator station after confirming safe conditions

AS/RS Traffic Control — Aisle Interlock Violation

ASRS-TRAF1

AS/RS traffic management detected an aisle interlock violation. Two cranes attempting to enter the same aisle, or a crane in an aisle where personnel access is active.

critical asrs

asrs traffic interlock aisle safety crane collision

Probable Causes (ranked)

Aisle interlock sensor failed — not detecting crane presence in aisle
WCS traffic manager software lost communication with one or both cranes
Personnel access gate opened while crane is in the aisle — safety interlock activated
Crane overran the aisle boundary — positioning system did not stop crane at aisle limit
Manual mode operation bypassed traffic management interlocks

Fix Steps

1 Verify both cranes' positions — confirm no actual collision risk before proceeding
2 Check aisle boundary sensors — each aisle should have presence detection at entry/exit
3 Verify WCS communication to all cranes — check network connections
4 If personnel access gate triggered, walk the aisle to verify no personnel present before clearing
5 Do NOT override traffic interlocks without physically verifying the aisle is clear
6 Reset traffic violation from WCS operator station after confirming safe conditions

Field Trick

When a traffic interlock trips, NEVER clear it from the control room without physically verifying the aisle. AS/RS aisles are tight — if a person is in the aisle and you clear the interlock, the crane will move. Take the 5-minute walk to visually confirm the aisle is clear. Every time. No exceptions.

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