KSB PumpDrive 2 - Operating Ramp (Open-Loop Control Mode;Manual Mode); Start and Stop Ramp Parameters

8 Commissioning/Shutdown
110 of 212
PumpDrive 2
WARNING
Stop ramp time set exceeded in the case of steep stop ramps in conjunction with
pronounced mass inertia. (A "Limited Stop Ramp" warning is output.)
Hazard to operating personnel caused by rotating machine parts!
▷ Always keep a safe distance from rotating parts until the machine has come to
a complete standstill.
NOTE
In the event of a stop via the DI-EN digital input, the motor is not stopped by the
stop ramp, but coasts to a standstill. The amount of time this process takes depends
on the mass moment of inertia of the system. The drive remains disabled during
coasting. The Motor Disabled status is displayed on the control panel.
n
[min
-1
]
[s]
t
3-3-5-1
3-2-2-2
3-3-5-2
Fig.77: Start ramp (left) and stop ramp (right)
n Speed t Time
Table78: Start and stop ramp parameters
Parameter Description Possible settings Factory setting
3-3-5-1 Start Ramp Time
Time defining the start ramp
1 - 600 s 3 s
3-3-5-2 Stop Ramp Time
Time defining the stop ramp
1 - 600 s 3 s
3-2-2-2 Maximum Motor Speed 3-2-2-1…3-11-1-2 Motor-specific
Operating ramp (open-loop control mode/manual mode)
To avoid spontaneous changes in speed in open-loop control mode/manual mode,
operating ramps limit the change velocity of the speed. If a speed change curve is
flatter than the operating ramp, no limitation occurs.
Parameters 3-2-2-2 and 3-3-5-3 are used for defining the operating ramp.
n
[min
-1
]
[s]
t
3-3-5-3
3-2-2-2
3-3-5-3
Fig.78: Operating ramp
n Speed t Time