WIth a Service Key installed, change parameter 9.019 to FALSE. Make the axis visible on the display page by pressing [ALTER] then select the TT (or V) axis and press [ENTER].
Remove ESTOP and clear the alarms. Press [RECOVER] then 1 to select tool changer recovery. Press M for manual recovery.
Press F to find pocket #1.
Press [DIAGNOSTICS] to get back to the parameters. Type TT (or V) and press [F4] to set the grid offset. Zero Return the TT axis.