RSLogix Sequencing

[sensorman2002]

I'm used to writing and reading ladder logic in a step by step method and I'm not familiar with using sequencing for repetitive machine cycles.
What is the purpose of using a mask in SQC and SQO?

 

[Ron Beaufort]

Greetings sensorman2002,

see if this post about the SQO and its mask answers your questions ...

and this post has more about masks in general ...

and welcome to the forum ...

 

[mordred]

think of a mask as a way to exclude unwanted bits in a single word

bit 11101111
mask 00001111
result 00001111 on the result only the last 4 bits are scanned as the first 4 bits are masked out.

on the SQO instruction if you right click the instruction look for edit special this will pull up a bit table showing your on off steps at each stage of the SQO instruction.

 

[sensorman2002]

Thank You for the responses. The previous posts were very helpful.