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Batch - resetting EM parameters from phase

Hello,

We are using EM's as a landing modules for collecting process data.  For one unit instance we have to reset around 8k parameters (in normal case 90% of them are 0) across 7 EM's. During initialize phase we have to reset all 7 EM's parameters using EM commands. Every EM is reset in separate action by an A_COMMAND and confirmed with A_PV. Actions are executed one after another. Unfortunately once Initialize phase is started and reset step is active, some of actions related to EM reset are not executed. This is a random case for different EM's. Any Idea why is that? We are running 11.3.1 with latest hotfixes and patches

Regards

Sebastian

• 28 May 2019 7:53 AM
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1 Reply

• Sal Salamone

  

  • 28 May 2019 6:04 PM

  Hi Sebastian,
  We write our EM code with an EM_COMMAND that makes sure the A_COMMAND is allowed and then writes to it. Then we have an EM_PV parameter that is set to EM_COMMAND in the last step, or final steps. This tells us the EM has completed that command. We started doing this after finding instances where the A_COMMAND changed prematurely or the A_PV equaling the A_COMMAND was missed. I do not know if those problems were resolved, but it is quite easy to add the two parameters I mentioned and then you have direct control of the process. It also allows you to notify the Phase that the EM command was completed when you never want to end the EM command. I'm not sure what area you are from, our Schaumburg IL office has many best practices incorporated to allow batch configuration run smoothly.

  Sal Salamone

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