Drive indicates controller enable if the Rdy signal changes to FALSE

Which products are affected?
EVS93xx-EI (Servo PLC V6.x)
EVS93xx-ET (Servo PLC V6.x with technology function)
ECS axis module: ECSxx operating software V6.x

What happens?
The drive is inhibited, e. g. via terminal. While the control board of the drive is continued to be supplied with 24 V the drive is disconnected from the mains. The DCTRL_bRdy_b signal (ready to operate) changes from TRUE to FALSE after the DC bus has been discharged. In this moment the DCTRL_bCInh_b signal (= controller enable) changes from TRUE to FALSE for a period of approx. 2 ms, i. e. for this short instant the controller indicates controller enable.

When does the problem occur?
The response described before occurs if the controller is inhibited and the drive changes from ready to operate to not ready to operate.

Possible diagnostics?
None.

Short-term measures/recommendations?
None.

Evaluation:
This function restriction does not influence the drive performance and may only lead to a wrong evaluation when the DCTRL_bCInh_b status signal of the DriveControl (DCTRL) system block is to be evaluated.

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/200605976/1/