Is there an ascii code in FrameMaker for a clockwise and counter-clockwise arrow?
ASCII never had such characters, nor did FM's internal character set.
If you have a font that populates these code points, such as Segoe UI Symbol, Unicode defines:
[⟲] U+27F2 ANTICLOCKWISE GAPPED CIRCLE ARROW
[⟳] U+27F3 CLOCKWISE GAPPED CIRCLE ARROW