Auto step does not honor delays in my chart

groov EPIC
1

Hi all,

I am working on a chart for a GRV-EPIC-PR1control unit that will activate a pneumatic cylinder,wait for it to complete (come back home), then activate a belt to advance product, then wait for it to return home again. This chart has a few delays sprinkled throughout to make sure, that the devices actually activate and leave home before checking to see that they have come back home. There are also delays used while waiting for them to come back home.

When PAC control is in debug mode with auto step, everything works and is predictable. Without auto step, it seems that none of the delays are being honored. I suspect some of these delays are too short, but I’m not sure how short would be considered too short. If have seen this thread and I’m pretty sure I’m dealing with the same issue, but I’m not exactly sure how it relates to my chart.

Can anyone make suggestions regarding how to modify the following chart to overcome this?

HOPPER
HOPPER608×857 73.4 KB

Thanks for looking

Kevin

2

Let’s assume that the delays are working as they should (they are).

The most likely issue is the ejector moving from the home position and for the I/O or however that is being determined is taking longer than you expect.

It would be better practice to not rely on delays, but rather to check the IO that the ejector has left before checking if it came back home. If this is a brief period, you may want to clear and check the off latch.