Siemens SINAMICS S120 Function Manual page 70

Operating Modes
Servo control
OFF responses
S OFF1 and p1300 = 23
-- Reaction as for OFF2
S OFF1, p1501 = "1" signal and p1300 ≠ 23
-- No separate braking response; the braking response takes place by a drive
that specifies the torque.
-- The pulses are suppressed when the brake application time (p1217) expires.
Zero speed is detected if the actual speed drops below the threshold in
p1226 or if the monitoring time (p1227) started when speed setpoint
<= speed threshold (p1226) has expired.
-- Power-on disable is activated.
S OFF2
-- Instantaneous pulse suppression, the drive "coasts" to a standstill.
-- The motor brake (if parameterized) is closed immediately.
-- Power-on disable is activated.
S OFF3
-- Switch to speed-controlled operation
-- n_set=0 is input immediately to brake the drive along the OFF3 deceleration
ramp (p1135).
-- When zero speed is detected, the motor brake (if parameterized) is closed.
-- The pulses are suppressed when the motor brake application time (p1217)
has elapsed. Zero speed is detected if the actual speed drops below the
threshold in p1226 or if the monitoring time (p1227) started when speed
setpoint <= speed threshold (p1226) has expired.
-- Power-on disable is activated.
Function diagrams for torque-controlled operation (see List Manual)
S 5060
S 5610
Signal overview (see List Manual)
S r1406.12
3-70
Torque setpoint, control mode switchover
Torque limitation/reduction/interpolator
Torque control active
© Siemens AG, 2005. All rights reserved
SINAMICS S120 Function Manual, 06/05 Edition