I'm trying to understand the difference between F2025 - Drive not ready for control, and F2026 - Undervoltage in power section.
In principle, it seems that both cover the same error (you cannot enable the drive when the drive isn't in Ab).
My guess is that the current state of the axis decides which occurs. For F2025, the drive state is bb --> Drive Enable bit toggles --> F2025
For F2026, the drive state is AF/AH --> DC bus state of the drive changes to not ready --> F2026.
Is this correct thinking, or is there a better way to understand this drive state?