Lenze EVS 9300 series, System Manual

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Function library
Function blocks
9.2.41 Mains failure control (MFAIL)
9-146
L
EDSVS9332S-D11 EN 3.0
Range of functions
z Mains failure detection
z Mains failure detection
z Restart protection
z Reset of the mains failure control
z Dynamic adaptation of the control parameters
z Fast mains recovery (KU)
z Application examples
9.2.41.1 Mains failure detection
A failure of the power supply can be detected by
5. evaluating the DC-bus voltage or
6. an external system for mains failure detection (e.g. 934X module or voltage measuring relay).
It is possible to combine the two methods.
The type of the mains failure detection to be used depends on the drive system used.
DC-bus voltage evaluation
Use with single drives or multi-axis drives, which do not use external monitoring systems.
z 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 into 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
CM P 2
CMP2-OUT
CMP2-IN1
C0689/2
CMP2-IN2
C0688/1
C0688/2
C0685
C0472/20
MCTRL-DC V OLT
Fig. 9-99 Example of a mains failure detection with internal function blocks (section)