Chapter 4 Explanation of Functions
4 - 70
4.2.75 Reverse rotation signal (RVR)
The inverter continues to output the forward rotation (RVR)
signal while it is driving the motor for reverse operation.
The RVR signal is turned off while the inverter is driving the motor for forward operation or stopping the
motor.
Item
Function code
Data or range of data
Description
Terminal function
C021 to C025
Alarm relay terminal function
C026
52
RVR: Reverse rotation signal
4.2.76 Major failure signal (MJA)
The inverter outputs the major failure (MJA) signal in addition to
an alarm signal when it trips because of one of the errors listed
below.
(This signal function applies to the tripping caused by hardware.)
No. Error
code
Description
1 E10.*
CT
error
2 E11.*
CPU
error
3 E14.*
Ground-fault
protection
4
E20.*
Temperature error due to cooling-fan fault
5
E23.*
Gate array communication error
6
E25.*
Main circuit error
Item
Function code
Data or range of data
Description
Terminal function
C021 to C025
Alarm relay terminal function
C026
53
MJA: Major failure signal
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function
Related code
Output frequency (Hz)
Forward rotation signal
Reverse rotation signal
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function
Related code
Содержание SJ700B SERIES
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