Siemens SINAMICS G120XA - Procedure for Switching off an Uncontrolled Motor

Figure 6-53 Deactivate uncontrolled motors M
1
… M
3
Procedure for switching off an uncontrolled motor:
1. The speed-controlled motor turns with minimum speed p1080.
2. The control deviation of the technology controller is less than -p2373.
3. Time p2375 has expired.
The converter accelerates the speed-controlled motor with ramp-up time p1120 to the
activation/deactivation speed p2378. Until the activation/deactivation speed p2378 is
attained, the converter deactivates the technology controller temporarily.
4. After shutdown delay p2386, the converter disconnects an uncontrolled motor.
Sequence for activating and deactivating the M
1
… M
3
motors
Table 6-59 p2371 specifies the sequence for activating and deactivating the motors
p2371 → → → Sequence for activating motors → → → Power of the activated M
1
… M
3
motors compared with the speed-
controlled DM motor
→ → → Sequence for deactivating motors → → →
Stage 1 Stage 2 Stage 3 Stage 4 Stage 5 Stage 6 1 × M
D
2 × M
D
3 × M
D
1 M
1
M
1
--- ---
2 M
1
M
1
+M
2
M
1
, M
2
--- ---
3 M
1
M
2
M
1
+M
2
M
1
M
2
---
4 M
1
M
1
+M
2
M
1
+M
2
+M
3
M
1
, M
2
, M
3
--- ---
5 M
1
M
3
M
1
+M
3
M
1
+M
2
+M
3
M
1
, M
2
M
3
---
6 M
1
M
2
M
1
+M
2
M
2
+M
3
M
1
+M
2
+M
3
M
1
M
2
, M
3
---
7 M
1
M
1
+M
2
M
3
M
1
+M
3
M
1
+M
2
+M
3
M
1
, M
2
--- M
3
8 M
1
M
2
M
3
M
1
+M
3
M
2
+M
3
M
1
+M
2
+M
3
M
1
M
2
M
3
Parameter
Parameter Description Factory setting
p2200 Technology controller enable 0
p2251 Technology controller mode 0
p2370 Cascade control enable 0
p2371 Cascade control configuration 0
p2372 Cascade control motor selection mode 0
p2373 Cascade control activation threshold 20 %
p2374 Cascade control activation delay 30 s
p2375 Cascade control deactivation delay 30 s
p2376 Cascade control overload threshold 25 %
p2377 Cascade control interlock time 0 s
p2378 Cascade control activation/deactivation speed 50 %
r2379 Cascade control status word ---
p2380 Cascade control operating hours 0 h
p2381 Cascade control maximum time for continuous mode 24 h
Advanced commissioning
6.5 Technology controller
SINAMICS G120XA converter
268 Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB