I'm having a problem with an AB Micrologix 1000 program that utilizes a sequencer (SQO) to alternate the operation of a series of lights. I'm fairly new to PLC's, but I understand ladder logic and have been successfully modifying previously-created programs as needed for new applications. I want to revise an existing program that sequences five lights(SQO Length=5) to one that sequences six(SQO Length=6). The original Length 5 program works fine. But in the Length 6 program, the output bit for position six never gets set, so the sixth light is never turned on. Any suggestions out there?
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
In the components business price can often be the determining factor as to what product the manufacturer uses. For a great many mass-market products and applications, the low-cost off-the-shelf, one-piece stamped receptacle fits the bill. The price is right, the performance is adequate. Download Now
In today’s cost-sensitive world, designers are often driven to specify the lowest cost solution for every aspect of their designs to ensure that their solution is competitively priced and their company remains profitable. However, specifying a low-cost, low-quality connector solution can result in premature failure, considerable re-work costs and damage to reputations.
Increasingly, product and services companies are seeking more information and control in the
operational lifecycle of their products, including service and use. Better information about the operational lifecycle, and the ability to use that information, requires more than just unstructured data flowing back from products in the field.