Chapter 7 Explanation of Functions
7 - 74
7.8.19 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
52
RVR: Reverse rotation signal
Alarm relay terminal function
C026
7.8.20 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.
No. Error
code
Description
1 E08.*
Memory
error
2 E10.*
Current detection error
3 E11.*
CPU
error
4 E14.*
Ground-fault
protection
5
E19.*
Inverter thermal detection system error
Item
Function code
Data or range of data
Description
Terminal function
C021
53
MJA: Major failure signal
Alarm relay terminal function
C026
Output frequency (Hz)
Forward rotation signal
Reverse rotation signal
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