Posted 12 Nov 2012 Dear Friends, I have a problem in my PLC-2. Because there was a problem in one terminal of 24Vdc-output card. I put the PLC-2 on test mode then I pull out the card and input the new one. Then I switch the key to Run but all the output cards in each Rack still off while the input cards still on. Then I tried many times nothing change. After that, I switch the PLC power off but when I switch it on all the input and output cards are off. Please hope to answer me as soon as possible. I don’t know how to put it back again. Waiting your response as soon as possible. Share this post Link to post Share on other sites
Posted 12 Nov 2012 Do you have a backup copy of the plc program, you may need it. The plc may have lost its program. Could be a power supply issue as well, are there any lights on at all. download the manual below, chapter 5 has a good troubleshooting matrix. http://literature.rockwellautomation.com/idc/groups/literature/documents/in/1772-in001_-en-p.pdf Below are some other useful manuals. http://literature.rockwellautomation.com/idc/groups/literature/documents/pm/1772-pm003_-en-e.pdf http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/5000-rm004_-en-p.pdf http://literature.rockwellautomation.com/idc/groups/literature/documents/pm/1772-pm001_-en-p.pdf Share this post Link to post Share on other sites
Posted 12 Nov 2012 (edited) Did you power the unit down before you pulled and replaced the card? If not see chitwoodb's post. Edited 12 Nov 2012 by Mickey Share this post Link to post Share on other sites
Posted 13 Nov 2012 You probably have damaged the PLC as you MUST NEVER remove and/or replace the cards WITH the POWER ON in any AB PLC except the ControlLogix PLC's Share this post Link to post Share on other sites
Posted 18 Nov 2012 Thank you guys, the problem have been solved. I pulled out the power supply in every rack and put it on again after a few second then i turned on the power supply after that I found all input cards got power on again. and switch the PLC to RUN again then every thing back to normal Share this post Link to post Share on other sites