FANUC Alarm TG-016 — Bad Time Before in Sch… Ev…
Manufacturer wording — Bad Time Before in Sch%d^2 Ev%d^3
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC TG-016 (“Bad Time Before in Sch… Ev…”): The indicate trigger schedule event in $TGSCHED[Sch] has an invalid value for time before. First check: The time before (or anticipator) value cannot be less than (i.e.
Updated 2026-09-17 · LogrobotLM reference
Description
The indicate trigger schedule event in $TGSCHED[Sch] has an invalid value for time before.
Remedy
The time before (or anticipator) value cannot be less than (i.e. more negative than) -100 msec. Check all anticipator values defined in the application to be sure none indicate a time after (i.e. negative time before) greater in magnitude than 100 msec.
Related codes
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →