FSCOM <---> FSKEY Strange Problem

[Themis 0]

Hello to all.I'm experiencing a strange problem with my FSKEY and FSCOM. All the setup was working very nice. After making some minor changes in the PSU unit and cabling, FSCOM can't accept any input from any of my 3 FSKEY cards. It can control any FSDISPLAY the FSLED or programming (read/erase/write) all my FSBUS PCBs but can't accept any input from the FSKEY circuits.All cables are tested. The setup worked great before with the same set of cables. Normal/Programming Jumpers also. Voltage in PICs are OK. I have Reset the FSCOM with no results. Like "someone" has closed the input from the FSKEY to FSCOM. It can't be a fault of the FSKEY as I can't read from any of 3Maybe I have "burn" an IC in the FSCOM. But I want some help from a builder with further knowledge on electronics to spot the faulty area.Thanks in advance,Themis KatakalosAthens,Greece

[iwik 0]

Hi Themis,Your FSbus config file maybe corrupted.backup your current fsbus files and start a new one with only FS key setup.See if that works.If you run the Fskey test does it show the switch working?.If it does then and not in Fs9 then i would think your config file for fsbus is not right.Your fscomm bd is ok as it works for fs display.Hope this helpsLes

[tigert 0]

Also try re-flashing the pics, I have had the PICs flash get corrupted once, probably due a voltage spike or something. Re-flashing them made things work again. Symptoms were very similar.//Tuomas

[Themis 0]

Hello again!Many thanks for your help! The problem finally was a half-burned MAX232 on COM board propably from a spike. Many thanks also to Dirk Anderseck for his suggestions on metering the board voltage.MAX232 is a very tricky IC . Thats because it uses 2 inputs and 2 outputs as I can read from its PDF. 1 of the 2 inputs was burnout!Best RegardsThemis KatakalosAthens, Greece