I checked the input terminal state in parameter ru.21 and when i gave switching to terminal 16 i.e. control release, the display showed 1, meaning the control card is detecting the voltage given at terminal 16.
SOURCE: F5 KEB inverter nop problem
If using bus communications (Can, ProFi, Mod, ext), there may be a communications command (Software signal) that is not being provided. Hardware and software enable signal required to obtain LS.
Possible that the terminal on the control card is bad due to miss connection or signals outside of the rated value.
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