Configuration
Function blocks
Internal motor control with V/f characteristic control (MCTRL1)
8
8.2
8.2.6
8.2-39
EDSVF9333V EN 3.0-06/2005
Flying restart circuit without protection against unexpected start-up
(C0142 = 3):
0
1
2
3
4
9300vec088
Fig. 8.2-17 Signal characteristic for automatic start with flying restart circuit (C0142 = 3)
Speed setpoint (e.g. AIN-OUT)
Actual speed value
Fault (e.g. DCTRL-FAIL = HIGH)
Pulse inhibit (e.g. DCTRL-IMP = HIGH)
Enable controller (e.g. X5/28 = HIGH)
c The motor rotates with setpoint
d A fault (e.g. mains failure, TRIP SET) activates a pulse inhibit .Themotor
coasts. After eliminating the fault (e.g. mains recovery, TRIP RESET) the pulse
inhibit is deactivated.
e The f lying restart circuit is active now and calculates the current motor
speed. If, after an OU message, the pulse inhibit is deactivated again, the
flying restart circuit is not started.
f The m otor is accelerated along the set acceleration ramp to the speed
setpoint and is being kept there
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