Lagunmatic 3516-SX Retrofit

andypugh wrote: What controls "Machine-is-enabled" ?

Is that signal permanently "true" ?

You are not mentioning the 0V lines at any point, are you sure those are continuous and common where they should be?

Hey Andy,

I thought that was a built-in parameter I selected from a drop-down in PNConf but now I'm second-guessing that...? So I had assumed it was controlled by the Machine On button in Axis.

If I typed my own parameter name in then I can see how it might be permanently on. At one point I did Invert that pin in my .hal file and it still went to 24v upon opening Axis

Which 0v lines are you asking about?

giz wrote: I thought that was a built-in parameter I selected from a drop-down in PNConf but now I'm second-guessing that...? So I had assumed it was controlled by the Machine On button in Axis.

There are no "built-in" signal names, they can be anything. Pncconf has it's own internal standard, though.
The HAL pin names are fixed. Those have to exist, bit if a signal (first thing after the "net" command doesn't exist then it is just created.
halcmd show sig
will list all the signals and their sources and sinks.

Which 0v lines are you asking about?

The ones that complete the circuits, for example through the relay coil.
Common / Gnd, whatever you want to call it. (I don't like to call it Gnd, it isn't)

Got it - I will look into the signal names. I did notice most of my outputs were active but some were 0v.

My 0v all seem to be correctly connected to each other and functioning properly. When I connected my external power supply to that relay, I only connected the live side and the switch flipped.

The only thing that makes sense to me is if I am doing something wrong by measuring voltage against the 7i77 field ground

If you measure 24V at the 7I77 output with the relay connected the relay should be on
(if the relay common is connected to field ground)

Are you saying that the relay is permanently stuck on?

(measuring the 7I77 outputs with no load will not yield any useful information)

PCW wrote: If you measure 24V at the 7I77 output with the relay connected the relay should be on
(if the relay common is connected to field ground)

Are you saying that the relay is permanently stuck on?

(measuring the 7I77 outputs with no load will not yield any useful information)

You may have just solved this, because the relay common is not connected to the field ground.

So I should connect wire [G] in my diagram to the relay common, wire [1]? That is the common for all the auxiliary power on the machine.

The relay seems to be working correctly - I'm certain the problem is how I've supplied power to it and the above would explain that.

*EDIT- I'm going to have to verify this... the field power is fed by a 24v power supply that is being powered by the same 120v as wire [2] and wire [1]

*EDIT 2- just checked for continuity and the 7i77 field ground is not tied into the common ground

I did some testing today and didn't find a solution. I tested continuity between the 7i77 field power ground and the machine common ground and found that it was isolated. I put together some images to show what I tried - any time I tried to tie the 7i77 field power ground into the machine common ground I lost field power (no LED on the 7i77)

Here is how I have it setup currently. I have a 24v power supply feeding power to the 7i77 Field I/O. The 120v neutral line coming into the power supply is tied the common ground. The 120v lines are daisy-chained to the 5v power supply feed the 7i77. This means the 7i77 5v power is tied into common ground but the field I/O is not. I am getting field power and 24 volts out of Output 9 but the relay is not switching.

image missing https://i.imgur.com/vmQkwxVl.jpg

I attempted to tie the field I/O into common ground three ways. The first time I disconnected the field I/O ground wire from the 24v power supply and connected it to the output of the 5v power supply. When I turned main power on, I did not have power to the field I/O (no LED indicator). I measured 24v at the field power IN when measured against the screw terminal of the power supply, but 0v when measured against common ground.

image missing https://i.imgur.com/RsIYuHal.jpg

Next I tried daisy-chaining the ground from the 120v supply side of the 5v power supply. Same result, no power to field I/O.

image missing https://i.imgur.com/dmrf7Sll.jpg

Lastly I reconnected the field power ground to the 24v power supply and added a jumper from wire [1] at the relay (common ground) to the 24v output. My thinking was that I should definitely get 24v between the field power IN and GROUND and still tie everything in. However this caused the power supply to act wonky, with an intermittent green LED which indicates 24v. supply is active

image missing https://i.imgur.com/OnwqlO8l.jpg

Hopefully these notes make sense. I didn't take a photo of each setup so I just added notations to the original image. Clearly I'm lost here... but once I get this sorted out I think I'll be ready to tune the servos.