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POLA unipolarWithRemoteCtl set polarity
20/05/2022 - Change in POLA Executor for EEI sub-class.
Given that the EEI PSs doesn't directly switch from one polarity to the opposite one, the startCmd code that executes the POLA command has been changed. Now it send the modbus command "go to polarity open" before the actual modbus command "go to polarity X".
bipolar error: notExecutableCmd
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