Mitsubishi Electric NZ2EX2B-60AD4 - Page 126

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(3) Points for the use of the difference conversion function
(a) Operation when an input signal error occurs
In the event of an input signal error, changing CH Difference conversion trigger (RY14 to RY17, RY24 to
RY27) from No request (OFF) to Trigger request (ON) does not allow difference conversion to start. After the
analog input value returns within the setting range, change CH Difference conversion trigger (RY14 to RY17,
RY24 to RY27) from No request (OFF) to Trigger request (ON) again. If an input signal error occurs in the
status of Trigger request (ON), the difference conversion starts just when the analog input value returns within
the setting value, treating the digital output value as the difference conversion reference value.
4
2
0
0
-384 (minimum digital operation value)
Time
Analog input value (mA)
Input signal error is occurring.
CH Difference conversion reference value
(RWr6 to RWr9, RWr16 to RWr19)
CH Difference conversion state flag
(RX14 to RX17, RX24 to RX27)
CH Difference conversion trigger
(RY14 to RY17, RY24 to RY27)
CH A/D conversion completed flag
(RX10 to RX13, RX20 to RX23)
Input signal error detection signal
(RX1C, RX2C)
ON
ON
ON
OFF
Bit of the corresponding channel of Input
signal error detection flag
(RWrA, RWr1A)
OFF
OFF
ON
OFF
ON
OFF
Timing at the time of
returning from the input
signal error to a normal
value
Detection range
Out of detection range
Included
Digital operation value
External input
(mA)
Limited to the minimum value
of a digital operation value