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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