Mitsubishi MELSEC-L Series User Manual page 100

(6) Input signal error detection signal (XC)
• Input signal error detection signal (XC) turns to ON when an analog input value exceeds the range set with
CH Input signal error detection setting value (Un\G142 to Un\G145) in any channel which has been A/D
conversion-enabled, after validating the input signal error detection.
• After setting the analog input value within the range set, turn Error clear request (YF) OFF → ON → OFF to
turn OFF Input signal error detection signal (XC) and the ALM LED, and clear Latest error code (Un\G19).
• When the analog input value falls within the range set, A/D conversion resumes regardless of Input signal
error detection signal (XC) reset, and A/D conversion completed flag (Un\G10) for the corresponding
channels turns back to ON.
The averaging processing time count is reset to zero after the resumption of the A/D conversion.
Input signal error detection
flag (Un\G49)
Input signal error detection
signal (XC)
Error clear request (YF)
(a) When Input signal error detection signal (XC) turns ON
• A/D conversion completed flag (Un\G10) for the corresponding channels turns OFF.
• For the error detected channel, the digital output value immediately before the error detection is held in the
buffer memory.
• ALM LED flashes.
(7) Maximum value/minimum value reset completed flag (XD)
Maximum value/minimum value reset completed flag (XD) turns ON after resetting the maximum or minimum
values stored in CH
Un\G33, Un\G35, Un\G37) by turning Maximum value/minimum value reset request (YD) OFF → ON → OFF.
Maximum value/minimum value
storage area (Un\G30 to Un\G37)
Maximum value/minimum value
reset request (YD)
Maximum value/minimum value
reset completed flag (XD)
98
0
OFF
OFF
Maximum value (Un\G30, Un\G32, Un\G34, Un\G36) and CH
ON
Controlled by the A/D converter module
Controlled by the program
Input signal error
ON
ON
Controlled by the A/D converter module
Controlled by the program
OFF
ON
0
OFF
OFF
Minimum value (Un\G31,
OFF