CaspianSage
Member
Greetings Friends,
I have a 1771-A2B with one slot not recognizing inputs nor will it turn on any output. It started acting up intermittently on a couple inputs, now nothing.
It is Slot C4- D4 only using C of course. I have taken the chassis apart completely to examine the board and I can see no physical damage.
I also have read out all of the connection points from the socket to the back of the board and the solder traces. I also squeezed (Tightened) and cleaned the socket pins to make sure the card was getting a good connection. I am coming up empty.
I re-soldered the holes that are pass through near pin 12.
Although the card sees an input, the PLC does not in the input image table-
I put a "-1" in the output image table to set all output bits and nothing turns on for that slot. I tested this with several input and output cards and every other slot works.
I know they are somewhat inexpensive on Ebay but I would like to find out where the failure point is.
Any Ideas?
Thank you for your time.... Sincerely!
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I have a 1771-A2B with one slot not recognizing inputs nor will it turn on any output. It started acting up intermittently on a couple inputs, now nothing.
It is Slot C4- D4 only using C of course. I have taken the chassis apart completely to examine the board and I can see no physical damage.
I also have read out all of the connection points from the socket to the back of the board and the solder traces. I also squeezed (Tightened) and cleaned the socket pins to make sure the card was getting a good connection. I am coming up empty.
I re-soldered the holes that are pass through near pin 12.
Although the card sees an input, the PLC does not in the input image table-
I put a "-1" in the output image table to set all output bits and nothing turns on for that slot. I tested this with several input and output cards and every other slot works.
I know they are somewhat inexpensive on Ebay but I would like to find out where the failure point is.
Any Ideas?
Thank you for your time.... Sincerely!
-
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