So would this be more appropriate? Sorry, electronics is not my strong suite and am trying to avoid a diode as i have not a clue what to get or how to use it.
The diodes are dirt cheap and available on eBay, Mouser or any electronics house. About any diode will work, it is like a check valve only allowing the voltage to travel one direction. The band side is the forward direction and would be closest to the terminal block http://www.ebay.com/itm/UF4007-Ultr...387392?hash=item4af43f9480:g:owoAAOSw5VFWJnvJ
To use diodes as shown previously the VFDs inputs internal logic jumper is set to source logic and instead of using SD for the common, PC is used. This means power flows from PC (+) to the switches and then to the respective input which is at 0V (-). This requires using the PC terminal (wire goes to the E-Stop then switches) and the VFD logic switch set to source from my read of the schematic.
So...Not to flog a dead horse here, but based on this, once i move the jumper from sink to source, assuming i had it wired as per the image below i should be in business? Note: the 3 position switch in the middle supports 4 poles NO with any 2 poles connected in either of the two closed positions. So, I would have STR+PC and JOG+PC to the left, and STF+PC and JOG+PC to the right with the middle being OFF.
Much thanks for sticking with me. I know I'm a bit think in the head, not to mention the mid section!
Needed my glasses for that picture. Its hard to grasp some of the concepts until you start doing it, I had a few pumps in the road learning about these things. You just need two diodes as shown, the banded end goes toward the terminal which is the direction of the current (signal). RL needs to be programmed to JOG function. The purpose of the diode as mentioned is like a valve, it allows a current (signal) in one direction and not the reverse, always from the + to - direction. This is why you need source logic so PC is the + terminal. So when you press the JOG button it makes contact with the RL terminal and allows the forward/reverse command terminal to be activated. When you operate the forward/reverse via the lever control, the current (signal) cannot travel backwards through the diode. If the diodes were not there, current would travel back through the jog for/rev switch to the RL terminal and you would only get jog speed. So no changes to your current wiring for the lever control switch. Connect another wire from your E-Stop to one side of your NO jog switch, connect the other terminal to RL, and the input (center) of a ON ON switch to switch from forward to reverse. Connect one output to STR with a diode anywhere inline as shown, connect the other output with a diode anywhere inline as shown. QED.
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