Siemens SINAMICS S120 Manual page 8

2 Prerequisites and Dependencies
Figure 2-5
The ExtendedCraneDCC uses SINAMICS Extended Brake Control, so the
standstill signal r1229.7 should be properly configured for application. R1229.7
depends on three signals p1226, p1227 and p1228.
P1226 (Threshold for zero speed detection) sets the speed threshold for the
standstill identification. Acts on the actual value and setpoint monitoring. When
braking with OFF1 or OFF3, when the threshold is undershot, standstill is
identified. When threshold is undershot, the brake control is started and the system
waits for the brake closing time in p1217. The pulses are then suppressed.
P1227 (Zero speed detection monitoring time) sets the monitoring time for the
standstill identification. When braking with OFF1 or OFF3, standstill is identified
after this time has expired, after the setpoint speed has fallen bellow p1226. After
this, the brake control is started, the system waits for the closing time in p1217 and
then the pulses are suppressed. P1228 (Pulse suppression delay time) sets the
delay time for pulse suppression. After OFF1 or OFF3, the pulses are canceled, if
at least one of the following conditions are fulfilled:
- The speed actual value falls below the threshold in p1226 and the time started
after this in p1228 has expired.
- The speed setpoint falls below the threshold in p1226 and the time started after
this in p1227 has expired.
Extended Crane Drive-Based Technology AC
Extended Crane Drive-Based Technology SINAMICS S120
DCC Add-On Description 109767457,
Close brake logic
V1.2, 09/2019
8