hi All
I am trying to learn allen bradley PLC and i bought PLC-5 enhanced PLC/20.
My first impression is very positive how powerful this PLC is for its age. My background is siemens so i am trying to learn allen bradley by youtube or reading manuals and also comparing to siemens s7.
Any chance you give me your feedback please.
- PLC-5 seems to have 32 concurrent tasks which is similar to having 32 OB1s in siemens which is continuous task. This nearly blew my mind :) Does anybody know how this concurrency is achieved - is there firmware assigning each task a fixed time eg. 20ms and then jumping to another one?
- Does anybody know why PLC-5 is using octal system which is very unique
- I heard that allen bradley can simulate things in very sophisticated way using debug files - any chance somebody give me a gist a little bit?
- Why there are so many ways to use memory - half slot full or double?
- What is rack really - in siemens its just bunch on modules on a rack :)
- I also heard that allen bradley when simulating signals its doing it in unique way comparing to simplistic way in which rockwell allows simulation of inputs or outputs during testing - can you help me to get my head around this ?
- Is rockwell website my best source ? -of course apart from this forum :)
- Is there any place to find old, educational PLC-5 programs to understand - people dont seem to share it much i believe
Regards