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Today we’re going to be testing a CPU351 90-30 Series.
I have a part number here, IC693CPU351 There’s a revision letter “JT”
You don’t have to worry about that, this test will be the same for all of them.
And I’m going to be placing them in a five slot rack, that’s a IC693CHS397 and it’s next
to a high capacity power supply that would be the IC693PWR330
So I’m going to go ahead and power this up. First thing I’m looking for of course is that
OK light is working and the next thing I’m going to do is connect up to it. You can see
the SNP port pulling, that’s a good sign. It shows that the information is getting through
the power supply through the cable to the CPU and that’s working.
I’m going to go into program mode and I’m going to prepare it to go into run mode. Now,
what I’m doing here in the background is I’m just putting in a completely blank information,
no modules in the slots, just trying to get the CPU to go into run mode.
Another thing I’ll be testing, you’ll see in just a second, is that the memory on off
protection switch, which is working. Now, I should be prepared to go into Run mode.
As long as this switch is working, I’ll be able to go into Run mode, you’ll be able to
see it here on this LED when I turn this on, and it is.
So, now that we’ve tested that and it’s in Run mode I’m going to go ahead and unplug,
plug into Port 2. Now, Port 2 is pulling and my screen is connected so I’m sure that port
is working. I’m going to go ahead and put that back. Now,
I’m going to use a different cable here to plug into our RS232 port. This is a cable
I wanted to show you IC693CBL316 as what appears to be like a phone jack on one side and a
serial port connection on the other side, this will go to the computer. Go ahead and
plug that in there. Again, I’m going to be looking for Port 1
to be pulling in just a second and it is. Now that that’s all working, if this is a
CPU that you think may be giving you trouble, I would leave it in run mode overnight or
over a weekend and check to see if it has fallen out of run mode or if it stayed in.
If it stayed in, usually we think it’s okay. But if it falls out, you want to go to your
software and go to Target>Diagnostics and find out what happened. There will be a reason
in there. Thank you.