PLC 2/30

[hesham 0]

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.

[chitwoodb 3]

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

[Mickey 71]

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

[alan_505 24]

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

[hesham 0]

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