Article: KB-10980
Difference between Multi Read and Read Conflict
Skill required to complete this article: Controls and level is Beginner.

What is the difference is between a multi read and a read conflict.
What is a multi read
What is a read conflict


Carton induction area with barcode scanner.


Most Intelligrated conveyor control systems provide for two distinct types of errors that each represent two barcodes being processed potentially for the same item. These two conditions, called 'Read Conflict' and 'Multi-Data' or 'Multi-read' are often confused by users.

The difference between the errors is in the source - which system detects 2 barcodes for one item. In a "read conflict" case, the scanner controller makes the detection, because the scanner trigger eye was blocked only once for two valid codes. The scanner then passes a single distinct "read conflict" message to the conveyor controller. In a "Multi-Data" / "Multi-read" case, the conveyor controller makes the detection, because the induct photoeye was blocked only once, for 2 code messages from the scanner.

Both can be caused by cartons / items that are travelling too close to one another at an induct area of a conveyor system.

Related items

Other common induct area errors on Intelligrated conveyor systems:

Internal Notes


Reason for confidentiality



Information in this document is subject to change without notice and does not represent a commitment on the part of Intelligrated. This information is typical of the questions and general advice given; however, your particular case and circumstances may produce different results or require different recommendations. Therefore, use of this information is not a suitable replacement for contacting Intelligrated Technical Service engineering for specific recommendations and solutions to your application.

No part of this article may be reproduced or transmitted in any form or by any means including recording, or information storage and retrieval systems, for any purpose without the express written permission of Intelligrated. All information contained within the article is private and confidential and the sole property of Intelligrated.

In no event, shall Intelligrated be liable for any damages whatsoever including, without limitation, damages for loss of business profits, business interruption, loss of business information, or other pecuniary loss, even if Intelligrated has been advised of the possibility of such damages. Because some states do not allow the exclusion or limitation of liability for consequential or incidental damages, the above limitation may not apply to you.

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Published on 8/11/2020.
Last Modified on 10/14/2021.
Last Modified by Kurt Kimnach.
Article has been viewed 19828 times.
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