Absolute value encoder (initialisation / communication)

What does it mean?

Sd7: the absolute value encoder must be initialised. Sd8: initialisation or communication of the absolute value encoder at X8 fails (inconsistent / no data).

Common causes

• The absolute value encoder needs initialisation, the X8 cable is loose/broken, the encoder rotates during mains switching, or the SinCos encoder is defective.

How to fix it

• Initialise the encoder
• make sure the X8 cable is tightened
• ensure the encoder does not rotate during mains switching
• replace the encoder if defective. After Sd7, always repeat the rotor position adjustment.

After troubleshooting: de-energise the device completely (disconnect the 24 V supply and discharge the DC bus) before opening the covers.