Lenze 9325 - Page 266

Function block library
7-149

SHB9300CRV EN 2.0
7.6.48 Mains failure control (MFAIL)
Purpose
If the supply voltage via L1, L2, L3 or +UG, -UG fails, the drive (drive network) can be decelerated
(braked) in a controlled way. Without this function, the drive (network)would coast.
C0988/7
MFAIL-DC-SET
C0989/1
MFAIL-FAULT
MFAIL-RESET
C0982
C0971
C0972
C0978
MFAIL-ADAPT
C988/2
C0973
C0974
C0981
+
-
1
0
C0988/1
C0970
MFAIL-CONST
C988/3
C0980
Vp
Tn
MCRTL-
DCVOLT
C0989/2
MFAIL-THRESHOLD
C0975
C0988/4
MFAIL-NACT
C0976
C0988/5
MFAIL-SET
C0977
C0988/6
CTRL
MFAIL-I-RESET
MFAIL-NOUT
MFAIL-STATUS
MFAIL
+
-
MFAIL-N-SET
C0983
Fig. 7-110 Mains failure control (MFAIL)
Signal
Source Note
Name Type DIS DIS format CFG List Lenze
MFAIL-N-SET a C0988/1 dec [%] C0970 1 1000 Speed setpoint in [%] of C0011
MFAIL-ADAPT a C0988/2 dec [%] C0973 1 1000 Dynamic adaptation of the proportional gain
of the U
Gset
controller in [%]of C0980
MFAIL-KONST a C0988/3 dec [%] C0974 1 1000 Proportional gain of the U
Gset
controller in
[%] of C0980
MFAIL-THRESHOLD a C0988/4 dec [%] C0975 1 1000 Restart threshold in [%] of C0011
MFAIL-NACT a C0988/5 dec [%] C0976 1 1000 Comparison value for the restart threshold in
[%] of C0011
MFAIL-SET a C0988/6 dec [%] C0977 1 1000 Speed start point for the deceleration in [%]
of C0011
MFAIL-DC-SET a C0988/7 dec [%] C0978 1 1000 Voltage setpoint on which the DC bus vol-
tage is to be maintained, 100% = 1000V
MFAIL-FAULT d C0989/1 bin C0971 2 1000 HIGH = activates the mains failure control
MFAIL-RESET d C0989/2 bin C0972 2 1000 HIGH = reset
MFAIL-N-OUT a - - - - - Speed setpoint in [%] of C0011
MFAIL-STATUS d - - - - - HIGH= mains failure control active
MFAIL-I-RESET d - - - - - HIGH = mains failure control active, the
drive is braking
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