Parameter to know when a machine has been in an e-stop condition

I am implementing a Tormach 8L lathe on a manufacturing production floor with non-machinists, and I am trying to poka-yoke the changeover process. I am looking for a way to know if the machine was in an e-stop condition. Is there a parameter that I can read to do this? Alternatively, is there a way to leverage the IO module to determine if the machine was pulled out of an e-stop condition?

Here is the backstory...the parts have bearings in them and the stationary portion is held in a steady-rest fixture while the rotating part is driven from the spindle. There are two different parts that we run in the machine...lets call them A and B. There is a steady-rest fixture for each part and they have different Z offsets. I am using a  Tormach 50355 Passive Probe to touch off Z on the part and set G54 to define the work offset. When we switch the steady-rest fixture I have to run a homing routine which basically calibrates the machine to the steady-rest fixture. I want to make sure that the machine gets calibrated every time the steady-rest fixture is removed/replaced and I know that an e-stop will occur when the fixture is changed.

Thank you for your assistance!

The cutting program needs to be blocked from running.

Perhaps said more clearly; after clearing an e-stop, the homing program must successfully run prior to permitting the cutting program to command motion.

I have not used HAL components yet, and was hoping to use a parameter or tool table offset to do this.

For other lock-outs, I have successfully used global, user-defined parameters in g-code to ensure sequencing has been followed. For example, when the homing routine for part A starts, I set #<_Homing_Complete_A> = 0 & #<_Homing_Complete_B> = 0. At the very end of the homing program I set #<_Homing_Complete_A> = 1. Then, at the start of the cutting program for part A (prior to commanding any motion) I check if #<_Homing_Complete_A> = 1 and proceed if true.