Slc 500

How do I reset an SLC 500 from CPU fault?
I accidentally used a crossover cable from 1747 UIC to the PLC.
I'm hoping i didn't burn the 1747 UIC. If I did is there any way to fix it?

Which SLC500 do you have? SLC5/01,02,03,04,05?

How do I reset an SLC 500 from CPU fault?
I accidentally used a crossover cable from 1747 UIC to the PLC.
I'm hoping i didn't burn the 1747 UIC. If I did is there any way to fix it?

Click to expand...

Does the above mean you can't get connected now?

Have you tried to cycle power?
And when all else fails clear memory. ( see PDF below)

It is a SLC 500 L30A. I did what it says on the PDF and the error changed from 002: Hardware Timeout to 001: NVRAM Corrupt. I hope i didn't brake it even more.
On the other hand, I found the burnt chip in the 1747 - UIC. It most likely is a MAX3430-CSA transceiver. I might be in luck with that one through a friend that built something similar last week and he might have an extra chip now. I'm holding my fingers crossed and if he fixes the 1747 UIC maybe I can clear the fault from the software (if I can connect and if the PLC isn't pinched).

Soooo whoever uses this setup pleeaaase triple check your cable before you plug it in. (NO CROSSOVER)


I'm thinking the 24 is coming from the PLC so it shouldn't have anything busted inside - just maybe shorted - from where the fault.

Anyway thanks for the PDF Mickey.

Do not use a standard ethernet cable, you must use the 1747-C13, it does not have wires to connect to the 24v on the processor DH485 socket.

Alan

here is the cable pinouts for the C13 cable notice the differents that Alan mentioned hopefully you did not burn out your 485 port

Does anyone have a 1747 UIC electrical schematics? What's the pinout from the RS 485 connector? How about a full electrical diagram?

[FONT=Arial, Helvetica]CABLE PINOUTS:

[/FONT] [FONT=Arial, Helvetica]Data Highway 485 (DH485) Communication Cables:
1747-C10/C11/C13/C20 CABLE PINOUT & CONNECTOR PART NUMBERS

P1 COLOR FUNCTION P2

1 RED CH. B TX/RC 1 TOP
2 BLACK CH. A TX/RC 2
3 BROWN +24 VDC 3 **
4 WHITE SIGNAL GND 4
5 BLUE TX-EN 5
6 DRAIN EARTH GND 6 **
7 GREEN SIGNAL GND 7
8 ORANGE +24 VDC 8 BOTTOM

[/FONT] [FONT=Arial, Helvetica]This is a straight through cable.
These cables have only been tested at the 1ft, 6ft and 20ft length
Longer lengths "WILL NOT" be supported by Allen-Bradley.
[/FONT]

The fried chip is actually an MAX3443ECSA+. This is 4.5 to 5.5 volt. The other one (MAX3430CSA+) is 3 to 3.6 volt.