Operating instructions
Functions, monitoring, and protective functions
9.5 Monitoring and protective functions
Drive converter cabinet units
408 Operating Instructions, 10/2008, A5E00288214A
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.
&XUUHQWOLPLWUHDFKHG
6SHHGFRQWUROOHUDWOLPLW
QBDFW
QBDFWS
S! !9HFWRUFRQWUROV
S!9IFKDUDFWHULVWLFV
&RQWUROPRGH
21GHOD\
0RWRUORFNHG
0.00...210 000.00 rpm
r2169
p2175 (120.00)
T 0
p2177 (1.000)
0,000...65,000 s
F7900
r2198.6
r1407.7
&
<20
≥ 20
&
r1305.12
p1300
Figure 9-28 Blocking protection
Function diagram
FD 8012 Messages and monitoring - Torque messages, motor blocked/stalled
Parameters
• p2175
Speed threshold motor blocked
• p2177
Delay time motor blocked