Mitsubishi Electric Q68AD-G User Manual page 97

3
SPECIFICATIONS
(4) Based on an input signal error detection setting value (input signal error upper and
(5) Refer to Section 3.2.3 for details of the input signal error detection function.
3.4.22 CH[ ] input signal error detection setting value/CH[ ] Input signal error detection lower limit setting val-
lower limit setting values), an input signal upper and lower limit values are calculated
as shown below.
The calculated values vary depending on the input range.
(a) Input signal error detection upper limit value
= gain value of corresponding range + (gain value of corresponding range -
offset value of corresponding range)
value (Input signal error detection upper limit setting value) /1000}
(b) Input signal error detection lower limit value
= lower limit value of corresponding range + (gain value of corresponding
range - offset value of corresponding range)
setting value (Input signal error detection lower limit setting value) /1000}
*1 For the lower limit value, offset value, and gain value for each input range, refer to Point (3) in this
section.
[Example When same upper limit value/lower limit value is selected for the input
signal error detection extended setting, setting 15% (150) to the input signal error
detection setting value in the Q68AD-G]
Resolution mode : High resolution mode
Used range : User range setting (Offset value: 5mA, Gain value: 18mA)
In this setting, because the lower limit value is an analog value at the time the
digital value is -12000, it is -8mA.
Therefore, the input signal error detection upper and lower limit values are as
follows:
Input signal error detection upper limit value = 18 + (18-5) x 150/1000 = 19.95mA
Input signal error detection lower limit value = -8 - (18-5) x 150/1000 = -9.95mA
*1
{input signal error detection setting
{input signal error detection
3.4 Buffer Memory
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