Lenze EVS9332xK - Manual (Page 228)

Function library
Function blocks
3.2.62 Mains failure control (MFAIL)
3−200
l
EDSVS9332K−EXT EN 4.0
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 (auto reclosure)
l Application examples
3.2.62.1 Mains failure detection
A failure of the controller’s power supply can be detected by
l evaluating the DC−bus voltage or
l an external system for mains failure detection (e.g. 934X supply 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.
l For this you can use a comparator (e.g. CMP2). Link the signals as follows:
– 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
CMP2
CMP2-OUT CMP2-IN1
C0689/2
CMP2-IN2
C0688/1
C0688/2
C0685
C0472/20
MCTRL-DCVOLT
Fig. 3−152 Example of a mains failure detection with internal function blocks (section)