A07927 — DC braking active

The drive reports that DC braking is active: the motor is currently being braked by DC current fed into it. A07927 is an informational alarm rather than a fault — the manual states that no remedy is necessary and that the alarm disappears by itself once DC braking has been executed.

• A message with response DCBRK is active: the motor is braked with the braking current set in p1232 for the duration set in p1233. If the standstill threshold p1226 is undershot, braking is canceled prematurely.
• DC braking has been activated at binector input p1230 with the DC braking set (p1230 = 4): the braking current p1232 is injected until this binector input becomes inactive.

1. No action is necessary — the alarm only reports that DC braking is running.
2. The alarm automatically disappears once DC braking has been executed; nothing has to be acknowledged.
3. If the DC braking was not expected, identify which of the two activation paths listed under causes applies — a message with response DCBRK, or the binector input p1230 = 4.

• p1232 (DC braking braking current / DCBRK I_brake) — sets the DC current injected into the motor while DC braking is running.
• p1233 (DC braking time / DCBRK time) — sets how long the braking current flows when DC braking is started by a message with response DCBRK.
• p1226 (threshold for zero speed detection / n_standst n_thresh) — if the speed undershoots this threshold, DC braking is canceled prematurely.
• p1230 (BI: Armature short-circuit / DC braking activation / ASC/DCBRK act) — binector input used to switch DC braking on directly; with p1230 = 4 the braking current p1232 is injected until the input becomes inactive.

No acknowledgment is required. The alarm is withdrawn automatically as soon as DC braking has been executed — after the braking time p1233 has elapsed when it was started by a DCBRK response, or when the binector input p1230 becomes inactive again.