Lenze 9325 - Reset of the Mains Failure Control

Function block library
7-150

SHB9300CRV EN 2.0
Range of functions
l Mains failure detection
l Mains failure control
l Restart protection
l Reset of the mains failure control
l Dynamic adaptation of the control parameters
l Fast mains recovery (KU)
l Application examples
7.6.48.1 Mains failure detection
The type of the mains failure detection to be used depends on the drive system used.
A failure of the voltage supply of the power stage is detected:
l by the level of the DC bus voltage or
l by an external system (e.g. supply module 934X or voltage measuring relay).
l Different systems can be combined.
Mains failure detected by the level of the DC bus voltage
Use with single drives or multi-axis drives, which do not use external monitoring systems.
l For this, you can use a comparator (e.g. CMP2). Set the signal links:
– C0688/1 = 5005 (MCTRL-DCVOLT to CMP2-IN1)
– C0688/2 = 19540 (free code C0472/20 to CMP2-IN2)
– C0971 = 10655 (CMP2-OUT to MFAIL-FAULT)
– Set function of the comparator CMP2 with C0685 = 3
Enter the function blocks CMP2 and MFAIL in free positions of the processing table in C0465.
C0989/1
MFAIL-FAULT
MFAIL-RESET
C0971
C0972
1
0
C0988/1
C0970
C0989/2
CTRL
MFAIL-NOUT
MFAIL-N-SET
MFAIL
C0686
C0687
C0689/1
CMP2
CMP2-OUT
CMP2-IN1
C0689/2
CMP2-IN2
C0688/1
C0688/2
C0685
C0472/20
MCTRL-DCVOLT
Fig. 7-111 Example of a mains failure detection with internal function blocks (section)
Main failure detection of the supply module
l A digital output of the supply module 934x is switched to the function block MFAIL via the
digital inputs DIGIN of the 93XX controller. In the example, input X5/E4 is used. Set the signal
link:
– C0971 = 54 (DIGIN4 to MFAIL-FAULT)
– C0871 = 1000 (remove DCTRL-TRIP-SET from terminal X5/E4)
– Select level (HIGH or LOW active) with C0114/4
Enter the function block MFAIL in a free position of the processing table in C0465.
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