HAAS^® Alarm 523 — CONDITIONAL REQUIRED PRIOR TO THEN

What it means

You've used THEN without an IF before it. The macro syntax is broken.

Common causes

• Missing IF[…]
• Block ordering error — IF and THEN on different lines incorrectly

What to check first

• Edit the program at the cited line
• HAAS^®<sup class="reg">®</sup> macro syntax: IF[condition] THEN action;

Prevention

Programming alarms are best prevented at the post-processor and verification stages. Always verify a new program in single-block mode with rapid override at 5–10% before committing to a full run. Keep a small library of tested macros rather than rewriting logic each job — and comment your variables clearly so the next person (or future-you) can read them.

If you’re still stuck

If you’ve worked through the checks above and the alarm hasn’t cleared — or if it cleared and came back — that’s the point to call. Persistent alarms after a reset usually mean a real component fault, and pushing through them risks turning a simple repair into a bigger one. Keith covers HAAS^® breakdowns across the UK with same-day phone diagnosis.