I.L. 40-386.3
4-6 (10/94)
For example: if the display shows status with a Value 1B.
The bit pattern which results from HEX Value 1B is shown below:
A bit set to “1” signifies that the corresponding failure has been detected. For normal error
free system performance, the “VALUE FIELD” display is “0”.
The relay failed the self-check in the area of External RAM (bit 0), EEPROM (one-out-of-
three failure, bit 1; two-out-of-three failure, bit 3) and Analog Input Circuit (bit 4). Normal-
ly, the test mode should show
For reference, the binary-to-hexadecimal conversion is shown below:
Right HEX Digit 3210
Left HEX Digit 7654
BINARY REPRESENTATION
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Status
TEST
1B
RELAY STATUS
BIT
DESCRIPTION NUMBER
External RAM Failure 0
EEPROM Warning 1
EPROM Checksum Failure 2
EEPROM Failure 3
(Non-Volatile memory)
Analog Input Failure 4
Processor Failure 5
HEX “VALUE” 1 B
Displayed
Bit pattern 0001 1011
Bit number 7654 3210
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