SYSTEM MESSAGES

[44H] CPU ACT/STBY Changeover Failure (Changeover NG or CPU RAM Copy NG)

1: 44XX 0000 0000 0000 2: 0000 0000 0000 0000 3: 0000 0000 0000 0000

 

 

➀ ➁

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4:

0000

0000

0000

0000

5:

0000

0000

0000

0000

6:

0000

0000

0000

0000

7:

0000

0000

0000

0000

8:

0000

0000

0000

0000

9:

0000

0000

0000

0000

 

 

 

 

 

 

 

 

Error detection by Routine

 

 

[44H] CPU ACT/STBY Changeover Failure

 

 

 

Diagnosis

 

 

 

 

 

 

Changeover NG or CPU RAM Copy NG)

 

 

ACT system after changeover

 

b0:

CPU

 

 

 

 

 

 

 

b7

 

 

 

b1

b0

 

 

0/1 = #0 is ACT/#1 is ACT

 

 

 

 

 

 

 

 

b1:

TSW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0/1 = #0 is ACT/#1 is ACT

CHAPTER 3

NDA-24300

Page 148

Issue 1

Page 175
Image 175
NEC NDA-24300 manual ➀ Error detection by Routine, ➁ ACT system after changeover