[PLC Sample Code] - Pinstamp

[neilr216 2]

File Name: Pinstamp File Submitter: neilr216 File Submitted: 29 May 2009 File Category: PLC Sample Code TASK: Do more with less. Write PLC code for an ancient Telesis pinstamp printer from the early 1990's, replacing a flaky ink jet printer that never worked properly Existing control system is an AB SLC500 PLC controlling a sixteen station assembly line. An AB basic module was used to communicate to the ink jet. Our options were: 1) Modify basic module code to suit ancient pinstamp 2) Find another way of doing it since we were in a hurry and didn't have enough experience with the AB system to do it in time. We opted to take an existing OMRON CQM1 PLC that we had gathering dust in the corner, and write code for the pinstamp Our part model and reject codes would be sent from the AB discretely as binary inputs to the CQM1 Using the CQM1 RS-232 port, the Telesis functions strictly as a printer with no confirmation signals sent back to the CQM1 Having installed a clock module in the CQM1 we were able to extract the Julian day and year and print it along with the model # and reject code . Not exactly the finest example of modern technology, but it works. Who said that OMRON and AB can't get along! P.S. - DM memory saved in project! Click here to download this file