Allen-Bradley 1784-KTX Reference Manual page 22

Chapter 2
Start up and Shutdown
2-6
See Table 2.B for RAM test status codes.
Table 2.B
Status Codes for RAM Test
RAM test status code
00h
02h
04h
06h
80h
82h
84h
86h
See Table 2.C for CTC test status codes.
Table 2.C
Status Codes for CTC Test
CTC test status code
00h
08h
10h
18h
See Table 2.D for SIO test status codes.
Table 2.D
Status Codes for SIO Test
SIO test status code
00h
20h
40h
After you have run the diagnostics, you must run the host compatibility
test. Read the next section for instructions.
Meaning of code
No Errors Detected
Failure of Z80 RAM 0
Failure of Dual port RAM
Failure of both RAM 0 and Dual port RAM
Failure of Z80 RAM 1
Failure of both RAM 0 and RAM 1
Failure of both RAM 1 and Dual port RAM
Failure of RAM 0, RAM 1, and Dual port RAM
Meaning of code
No Errors Detected
Failure of CTC Timer Mode
Failure of CTC Counter Mode
Failure of both CTC Timer and Counter
Meaning of code
No Errors Detected
Failure of SIO Channel: No Interrupt
Failure of SIO Channel A: Loopback Failure