What are the factors that vary scan time in an AB PLC5 processor? RS Logix shows the current scan time and a max scan time. The current scan time flucuates by a relatively small amount. The max scan time is usually about double the normal scan time, but I've seen a few with a max scan time 30 times higher than the normal scan time. What influences that?
Also, can anyone shed some light on the best methods for setting up scanner channels. We have one processor with 20 rack addresses on channel 1B and channel 2A and 2B are unused. Is this a good setup? Does it depend on the application? Or would it be best to evenly distribute these racks over two or three channels?
Also, can anyone shed some light on the best methods for setting up scanner channels. We have one processor with 20 rack addresses on channel 1B and channel 2A and 2B are unused. Is this a good setup? Does it depend on the application? Or would it be best to evenly distribute these racks over two or three channels?