AutomationTechBrian
Lifetime Supporting Member
I got a call from a guy who says the output on this PLC sticks closed after the output light goes out. It's a couple of hours drive, so I've been thinking about what he told me the imagine the possibilities.
I'm somewhat skeptical that an output sticks closed after the output light goes out, but I've seen stranger things. The output is wired to a contactor coil. He says he noticed it's more likely to happen when the machine is warm, than cold. He also said he just recently replaced the contactors, and that the previous contactor looked like it was "original". He threw the previous contactor away... I guess it was pretty beat up.
I remember a conversation I had in the past about the use of pull-up and pull-down resistors, but I'm not strong enough with my electronics to recall the details... just that they exist. I'm also thinking about ways to verify the issue. The wire has 110AC. A question for the AB experts... will my RS Logix 500 work on this PLC? If so, will my connector kit I got from TW Controls (Tim) have the right cable? I've never encountered a straight "500" before.
I'm somewhat skeptical that an output sticks closed after the output light goes out, but I've seen stranger things. The output is wired to a contactor coil. He says he noticed it's more likely to happen when the machine is warm, than cold. He also said he just recently replaced the contactors, and that the previous contactor looked like it was "original". He threw the previous contactor away... I guess it was pretty beat up.
I remember a conversation I had in the past about the use of pull-up and pull-down resistors, but I'm not strong enough with my electronics to recall the details... just that they exist. I'm also thinking about ways to verify the issue. The wire has 110AC. A question for the AB experts... will my RS Logix 500 work on this PLC? If so, will my connector kit I got from TW Controls (Tim) have the right cable? I've never encountered a straight "500" before.