s7-200 help.

[alanled]

Hi there, Im new to Siemens so please bear with me, Im writing a program for a test rig that carries out similar tests on upto ten different types of component not at the same time. For the appropriate test to be selected I have a 10 position panel mounted selector set to ten different inputs. A test consists of energising a number of solinoid valves and then observing a pressure (analogue input AIW0) is equal to or greater than the number stored in the particular test selected. The question Im asking is the best way to set out these inputs, at the moment I have the ten inputs in parallel with a individual subroutine for each one then a t the end of the subroutine it comes back to OB1 and continues with the rest of the test which is the same for all ten types of component. I know this is alot to ask but the help is much needed. Many thanks.