Operating Instructions

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 inverter 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 inverter deactivates the technology controller temporarily.
4. After shutdown delay p2386, the inverter disconnects an uncontrolled motor.
Sequence for activating and deactivating the M1 … M3 motors
Table 6-43 p2371 specifies the sequence for activating and deactivating the motors
p2371 → → → Sequence for activating motors → → → Power of the activated M1 … M3
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 × DM 2 × DM 3 × DM
1 M1 M1 --- ---
2 M1 M1+M2 M1, M2 --- ---
3 M1 M2 M1+M2 M1 M2 ---
4 M1 M1+M2 M1+M2+M3 M1, M2, M3 --- ---
5 M1 M3 M1+M3 M1+M2+M3 M1, M2 M3 ---
6 M1 M2 M1+M2 M2+M3 M1+M2+M3 M1 M2, M3 ---
7 M1 M1+M2 M3 M1+M3 M1+M2+M3 M1, M2 --- M3
8 M1 M2 M3 M1+M3 M2+M3 M1+M2+M3 M1 M2 M3
Interaction with the "Hibernation mode" function
In order that the "Cascade control" and "Hibernation mode" functions operate together without
any conflict, you must make the following settings in the cascade control:
● p2392 < p2373
The restart value of the hibernation mode (p2392) must be lower than the activation
threshold for the cascade control (p2373).
● p2373 < p2376
The activation threshold for cascade control (p2373) must be lower than the overload
threshold for the cascade control (p2376).
● It is not permissible that the main drive is in the hibernation mode.
● The actual speed must be higher than the restart speed for hibernation mode
(p1080 + p2390) × 1.05.
● The value for the activation delay of the cascade control (p2374) must be longer than the
ramp-up time from hibernation mode (t
y
).
t
y
= [(p1080 + p2390) × 1.05 × p1120 × p1139] / p1082
Advanced commissioning
6.20 Cascade control
Converter with the CU230P-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E34257946B AF 297