17 Function library
17.1 Function blocks | L_MFail_1
1413
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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1. Start the drive.
2. Set the acceleration time:
• Set the speed setpoint to 100 %, operate the inverter with max. speed.
• Set controller inhibit and measure deceleration time up to standstill.
• Set approx. 1/10 of the measured deceleration time in C01470/2
.
3. Set retrigger time:
• In case of mains failure control via detection of the DC-bus voltage level:
Set the deceleration time measured under point 2 in C01470/3
.
• In case of mains failure control via an external system:
Set the time in which the drive is to be continued to be brought to a standstill under control
at short-term mains recovery in C01470/3
.
4. Switch off the supply voltage (mains or DC bus).
The following profile is to be shown on the oscilloscope:
[17-47] Schematic diagram with activated mains failure control (ideal profile)
n = speed of the drive
Operating threshold OU
Switch-on threshold - braking unit
Operating threshold - mains failure
Operating threshold LU
n
t
0
t
UG
0
0
1
nDcSet_a
2 L_Compare_3.bOut
3
t1 t2
Point in time Info
t = t1 Mains failure
t = t2 Speed "0" reached.
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