KEB COMBIVERT F6 Programming Manual

Protection functions
© 2022 KEB Automation KG
89
Motor phase failure detection
Phase failure detection checks the connection between the inverter and the motor.
There are 2 different procedures for failure detection:
• DC signal
• High frequency signal
4.4.20.1 Activation
Motor phase failure detection is mostly needed in combination with brake handling:
if there is a phase failure, the brake must not be opened under any circumstances.
Therefore the activation occurs in parameter co21 brake ctrl mode bit 10 phase
check.
However, a missing phase can also cause undefined behavior in applications with-
out a brake. For this reason, the function is also available independently of brake
handling. If bit 10 is set to "on", the phase failure detection is always activated.
The monitoring runs in the status "start operation active".
co21
brake ctrl mode
0x2515
Bit
Function
Valu
e
Plaintext
Note
10
phase
check
0
off
no phase check
1024
on
Before the brake is released, it is checked whether all
three motor phases are connected. A phase failure is dis-
played in ru01 22: ERROR ident. Since this error can have
several causes, the reason is defined more precisely in
dr57 ident error info.
4.4.20.2 Configuration
The mode (DC or high frequency signal) is selected in parameter co27 phase
check ctrl, (co27[1] phase check mode) and an information about the test result is
displayed in (co27[2] error level information).
Index
Sub-
Index
Name
Function
0x251B
0
phase check control
Configuration of the motor phase failure detection
1
phase check mode
Selection procedure for failure detection
2
error level information
Detection quality

KEB COMBIVERT F6 Specifications

General

Brand	KEB
Model	COMBIVERT F6
Category	Controller
Language	English