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Originally Posted by steven114
I tested the relays with the multimeter - when I set relay1_fwd to 1, the spike turns red and the multimeter reads -12v. When relay1_rev is 1, it's green and the multimeter reads 12v. This seems backwards to me...
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I also checked a relay with a multimeter today (as I said I would last night) and came the to the same conclusion as steven114. With relay5_fwd set to 1 (relay5_rev = 0 and LED was red), the multimeter common probe on the M- of the spike connected to relay output 5, and the multimeter voltage postive probe connected to M+, the multimeter read -12V. The relay output cable was connected correctly. I also checked the same spike with the common probe on ground. I read 12v on the M- and 0v on the M+. It seems that the IFI aliases are incorrect.
I was wrong about this and my sincere apology to anyone I may have confused. My knowledge of the matter was based on a false assumption. The single solenoid I was basing this on was wired to the M- of the Spike. It was the only one of our 5 solenoids (2 double, 3 single) wired without an external ground (it has been rewired now).
I have rewritten ifi_aliases.h to change the aliases from fwd to rev and visa versa. I loaded the modified program into my bot and confirmed that relay 5 (my compresser) was getting +12V. A zip file with my new ifi_aliases.h file is attached to this post. Hope it helps. I am posting from MOE HQ workshop (not my dorm as usual) so I have get back to work now. Once again I'm sorry.