Maximum And Minimum Values Hold Function; Input Signal Error Detection Function - Mitsubishi Electric Q68AD-G User Manual

3
SPECIFICATIONS
3.2.2

Maximum and minimum values hold function

(1) The maximum and minimum values are held in the buffer memory channel by
channel.
(2) The maximum and minimum values are cleared to 0 when the maximum value/
minimum value reset request (YD) or operating condition setting request (Y9) is
turned ON, and new maximum and minimum values are stored when conversion is
started.
(3) Since the area for storing the maximum and minimum values can be rewritten with the
sequence program, the maximum and minimum values within a specific period of time
can be checked.
(4) When the scaling function is enabled, values after scaling conversion are stored as
the maximum and minimum values.
For the scaling function, refer to Section 3.2.6.
3.2.3

Input signal error detection function

(1) If the input voltage/current rose to or above the input signal error detection upper limit
value or fell to or below the lower limit value, the input signal error detection flag
(Un\G49) and input signal error detection signal (XC) turn ON and the ALM LED
flickers to indicate the error.
(2) When the input signal error detection flag (Un\G49) turns ON for a channel, a digital
output value immediately before the error detection is held for the channel, and the
A/D conversion completed flag (Un\G10) of the corresponding channel turns OFF.
(3) By bringing the analog input value within the setting range and then turning ON the
error clear request (YF), the input signal error detection flag (Un\G49) and input signal
error detection signal (XC) turn OFF.
3.2.2 Maximum and minimum values hold function
3.2 Function List
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