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I.L. 40-386.3
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:
4-6
Status
1B
HEX "VALUE"
Displayed
Bit pattern
0001
Bit number
7654
RELAY STATUS
DESCRIPTION
External RAM Failure
EEPROM Warning
EPROM Checksum Failure
EEPROM Failure
(Non-Volatile memory)
Analog Input Failure
Processor Failure
Right HEX Digit
3
Left HEX Digit
7
BINARY REPRESENTATION
0
0
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
1
9
1
A
1
B
1
C
1
D
1
E
1
F
1
TEST
1
B
1011
3210
BIT
NUMBER
0
1
2
3
4
5
2
1
0
6
5
4
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
(10/94)
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