ABB · ACS850 Standard Program Firmware
The drive displays a single dash '-', indicating a critical initialization error, possibly due to improper memory module insertion or the drive being stuck in recovery mode. This prevents the drive from starting up correctly and becoming operational.
Click steps to track your progress.
Power down the drive, then carefully remove and reinsert the memory module (e.g., SD card) ensuring it is fully seated and latched.
Attempt to boot the drive without the memory module inserted (if supported by the drive type for basic operation) to rule out module issues.
Try a known good, compatible memory module if available, or re-flash the firmware onto the existing module using a manufacturer-provided tool.
Perform a factory reset procedure if accessible (e.g., via specific button combination or dip switch setting on the control board) to clear corrupted parameters.
Check the drive's status LEDs and display for any additional error codes or patterns that might provide more specific diagnostic information.
Verify the drive's supply voltage (e.g., 24VDC for control power) is stable and within specified limits during power-up.