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MELSEC-Q
8 TROUBLESHOOTING
2) H/W LED Information (Right side)
Item Details
Status
CODE-b15
CODE-b14
CODE-b13
CODE-b12
Shows the first 4 bits of the value
converted into ASCII character
code.
CODE-b11
CODE-b10
CODE-b9
CODE-b8
ON/OFF status of
second digit of
"CODE" LED
Shows the last 4 bits of the value
converted into ASCII character
code.
CODE-b7
CODE-b6
CODE-b5
CODE-b4
Shows the first 4 bits of the value
converted into ASCII character
code.
CODE-b3
CODE-b2
CODE-b1
CODE-b0
ON/OFF status of first
digit of "CODE" LED
Shows the last 4 bits of the value
converted into ASCII character
code.
Display Example:
When [40] appears on the "CODE" LED:
Second digit = [4] = 34
H
(ASCII character code) = 0011 0100 (bit indication)
First digit = [0] = 30
H
(ASCII character code) = 0011 0000 (bit indication)
They are displayed as follows.
CODE-b15 to b0 = [40] = (34
H
) (30
H
) = 0011 0100 0011 0000
3) H/W SW Information (Left side)
Item Details
Status
MODE
Position of "MODE" switch
SET
Position of "SET" switch
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