Blocking Protection - Siemens SINAMICS S150 Operating Instructions Manual

9.5.3

Blocking protection

Description
The error message "Motor blocked" is only triggered if the speed of the drive is below the
variable speed threshold set in p2175. With vector control, it must also be ensured that the
speed controller is at the limit. With V/f control, the current limit must already have been
reached.
Once the ON delay (p2177) has elapsed, the message "Motor blocked" and fault F7900 are
generated.
0.00...210 000.00 rpm
p2175 (120.00)
r2169
r1407.7
r1305.12
Figure 9-29 Blocking protection
Function diagram
FD 8012
Parameters
• p2175
• p2177
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
p1300
&
≥ 20
<20
&
Messages and monitoring - Torque messages, motor blocked/stalled
Speed threshold motor blocked
Delay time motor blocked
Functions, monitoring, and protective functions
9.5 Monitoring and protective functions
T 0
r2198.6
F7900
p2177 (1.000)
0,000...65,000 s
403