Mitsubishi Electric MELSEC Q Series User Manual page 36

(9) Error detection signal (X18)
When a major or minor error occurs, the corresponding error code is stored in the buffer memory, and this signal
turns on.
When Error reset signal (Y28) is turned on, this signal turns off.
(10)Overflow signal (X19)
This signal turns on when "
When Overflow reset signal (Y29) is turned on, this signal turns off.
In case of an overflow, "
(11)Underflow signal (X1A)
This signal turns on when "
When Underflow reset signal (Y2A) is turned on, this signal turns off.
In case of an underflow, "
(12)Servo READY signal (X1B)
This signal indicates the on/off status of Servo READY signal (READY).
(13)Near-point dog signal (X1C)
This signal indicates the on/off status of Near-point dog signal (DOG).
(14)External stop signal (X1D)
This signal indicates the on/off status of Stop signal (STOP).
(15)Upper limit signal (X1E)
This signal indicates the on/off status of Upper limit signal (FLS).
(16)Lower limit signal (X1F)
This signal indicates the on/off status of Lower limit signal (RLS).
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Error detection signal (X18)
Error reset signal (Y28)
Current feed value" exceeds 2147483647.
Md.1
Overflow signal (X19)
Overflow reset signal (Y29)
Current feed value" changes as follows: 2147483647 -2147483648
Md.1
Current feed value" becomes less than -2147483648.
Md.1
Underflow signal (X1A)
Underflow reset signal (Y2A)
Current feed value" changes as follows: -2147483648  2147483647
Md.1
OFF
OFF
Executed by the QD73A1
ON
OFF
OFF
Executed by the QD73A1
ON
OFF
OFF
Executed by the QD73A1
ON
ON
ON
ON