Hitachi SJ700-2 Reverse rotation signal RVR, Major failure signal MJA, MJA Major failure signal

Models: SJ700-2

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Related code
C021 to C025: Terminal [11] to [15] functions
C026: Alarm relay terminal function

Chapter 4 Explanation of Functions

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

52

RVR: Reverse rotation signal

Alarm relay terminal function

C026

 

 

Output frequency (Hz)

Forward rotation signal

Reverse rotation signal

4.2.76 Major failure signal (MJA)

Related code

 

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.)

C021 to C025: Terminal [11] to [15] functions

C026: Alarm relay terminal function

 

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

 

53

MJA: Major failure signal

Alarm relay terminal function

 

 

C026

 

 

 

 

 

 

 

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Hitachi SJ700-2 instruction manual Reverse rotation signal RVR, Major failure signal MJA, RVR Reverse rotation signal