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Functions
7.9 Application-specific functions
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
274
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
Parameter
Description
Via tech.
setpoint
Via external
setpoint
P2393 = …
Energy-saving mode restart speed (rpm),
required in the case of external setpoint input. The motor starts as soon as the
setpoint exceeds the restart speed. The restart speed is calculated as follows:
Restart speed = P1080 + p2390 + p2393
P1080 = minimum speed
p2390 = energy-saving mode start speed
p2393 = energy-saving mode restart speed
-
x
P2394 = …
Energy-saving mode boost duration
0 (factory setting) … 3599 s. Before the inverter switches over into the energy-
saving mode, the motor is accelerated for the time set in p2394 according to
the acceleration ramp, but not to more than the speed set in P2395.
x
x
P2395 = …
Energy-saving mode boost speed
0 (factory setting) … 21000 rpm. Before the inverter switches over into the
energy-saving mode, the motor is accelerated for the time set in p2394
according to the acceleration ramp, but not to more than the speed set in
P2395.
Caution:
Make sure that the boost cannot cause any overpressure or overflow
conditions.
x
x
P2396 = …
Maximum energy-saving mode shutdown time
0 (factory setting) … 863999 s. At the latest when this time expires, the
inverter switches to normal operation and is accelerated up to the start speed
(P1080 + P2390). If the inverter is switched to normal operation in advance,
the shutdown time is reset to the value set in this parameter.
With p2396 = 0, automatic changeover to normal operation after a certain time
is deactivated.
x
x
Display parameters
Parameter Description
r2273
Display of the setpoint/actual value deviation of the technology controller
r2397
Actual energy-saving mode output speed
Actual boost speed before the pulses are inhibited or the actual start speed after restart.
r2399
Energy-saving mode status word
00 Energy-saving mode enabled (P2398 <> 0)
01 Energy-saving mode active
02 Energy-saving mode delay time active
03 Energy-saving mode boost active
04 Energy-saving mode motor switched off
05 Energy-saving mode motor switched off, cyclic restart active
06 Energy-saving mode motor restarts
07 Energy-saving mode supplies the total setpoint of the ramp-function generator
08 Energy-saving mode bypasses the ramp-function generator in the setpoint channel
Summary of Contents for SINAMICS G120 CU230P-2
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