coxbd316

I don't believe an A1S PLC has an instruction to do a block addition. Also keep in mind an A1S only has 1024 data register points unlike a Q-series which has 10K plus data registers points(depending on model of course). I could be wrong but I think the only option is to add each one individually. Not the greatest or cleanest way to do it, but I think that maybe your only option.

Thanks for all your info. As per Crossbow suggestion, I took a look at the IB(NA)66250 manual and ran across this: BIN_Manual.bmp It is stating that an operation error can occur due to BCD switch timing. What I am thinking is when the operators of the machinery changes model numbers on the thumbwheels, the are flipping through the thumbwheels quickly so this BCD switch timing must be setting off the operation error. Waynes makes a good point as to delaying the reading of the BIN inputs, but I believe the best answer would be to have the operators change their model # on the thumbwheel, then press a button to do the reading of the BIN inputs. Thanks everyone for your responses and help.

Thanks for the reply, I'm pretty sure Mitsubishi input/output designations are in hex. Which would be 0-9 and A-F. Don't believe that is the issue.

Hello everyone, First time posting, but I have been following the boards for awhile. Breakdown of what I have is an A1SH PLC on a piece of equipment that have 2 Omron thumbwheels used for Model #'s. The code I am using to get the model # in the PLC is this: PLCfault.bmp My problem is when you flip through the thumbwheels real quick, it faults out the PLC. But if you don't flip through the thumbwheels quickly then the PLC doesn't fault out. As anyone seen this before? Thanks for your help!!