Heidenhain FN 0-FN 27: Formula and logic functions

Heidenhain conversational functions for arithmetic (FN 0-FN 19), logic (FN 20-FN 27), messages, and writing system parameters.

For reference only: syntax changes with the control, the post-processor and the machine parameters. Check the official manual and run a simulation before cutting. Legal notice.

Family: Heidenhain
Machine: Milling, Turning, Mill-turn
Risk: Medium
Example: FN 0: Q10 = +5 / FN 1: Q11 = Q10 + Q2 / FN 17: SYSWRITE

Heidenhain FN 0-FN 27

Heidenhain

Formula and logic functions

E.g.:

FN 0: Q10 = +5 / FN 1: Q11 = Q10 + Q2 / FN 17: SYSWRITE

Machine: Milling, Turning, Mill-turnRisk: Medium

Heidenhain

They are the conversational equivalent of the Q-parameters variables; FN 17 writes to system parameters.

Other codes in Heidenhain

Heidenhain TOOL CALL Heidenhain tool call Heidenhain TOOL DEF Definition of tool Heidenhain CYCL CALL Cycle call Heidenhain LBL Labels and subroutines Heidenhain CALL PGM Subprogram call Heidenhain PATTERN DEF Position pattern Heidenhain APPR/DEP Contour approach and retract Heidenhain CHF/RND Chamfer and rounding Heidenhain CYCL DEF 1/2 Legacy deep drilling and tapping Heidenhain CYCL DEF 7-11 Basic transformations Heidenhain CYCL DEF 14/20 Contour and contour data Heidenhain CYCL DEF 200+ Modern machining cycles

See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does Heidenhain FN 0-FN 27 mean in a CNC program?

Heidenhain conversational functions for arithmetic (FN 0-FN 19), logic (FN 20-FN 27), messages, and writing system parameters. In the catalogue it appears as "Formula and logic functions", within the Heidenhain family.

Can you give me an example of Heidenhain FN 0-FN 27?

FN 0: Q10 = +5 / FN 1: Q11 = Q10 + Q2 / FN 17: SYSWRITE — Heidenhain conversational functions for arithmetic (FN 0-FN 19), logic (FN 20-FN 27), messages, and writing system parameters.

Which machines use Heidenhain FN 0-FN 27?

Heidenhain FN 0-FN 27 is used in: Milling, Turning, Mill-turn.

What should you watch out for with Heidenhain FN 0-FN 27?

Medium risk: it rarely breaks anything on its own, but a wrong value shows up on the part. Check the block before running the batch.

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