Mitsubishi Electric R60AD8-G - Page 45

1 FUNCTIONS
1.7 Input Signal Error Detection Function
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1
Setting the input signal error detection upper or lower limit value
■Input signal error detection upper limit value
Set the input signal error detection upper limit value by 1 (0.1%) based on the input signal error detection upper limit set value.
This value is calculated by adding "Analog input range width (Gain value - Offset value)  Input signal error detection upper
limit set value (%)" to the gain value. Only a value which is equal to or greater than the gain value can be set.
To calculate the input signal error detection upper limit set value based on the input signal error detection upper limit value,
use the following formula.
■Input signal error detection lower limit value
Set the input signal error detection lower limit value by 1 (0.1%) based on the input signal error detection lower limit set value.
This value is calculated by subtracting "Analog input range width (Gain value - Offset value)  Input signal error detection
lower limit set value (%)" from the lower limit value of each range. Only the value which is equal to or smaller than the lower
limit value of the range can be set.
To calculate the input signal error detection lower limit set value based on the input signal error detection lower limit value, use
the following formula.
The following table lists the lower limit value, offset value, and gain value for each range.
When 'CH1 Input signal error detection setting' (Un\G528) is set to Upper and lower limit detection (1) and the
same value is set for 'CH1 Input signal error detection lower limit set value' (Un\G529) and 'CH1 Input signal
error detection upper limit set value' (Un\G530), the same operation as the one performed with the following
setting can be performed.
• Setting 'CH1 Input signal error detection extension/input signal error detection setting' (Un\G47) to Upper
limit value/lower limit value same (0) in the Q compatible mode
For details on the Q compatible mode, refer to the following.
Page 46 When the function is used in the Q compatible mode
Input range Lower limit value Offset value Gain value
Voltage 0 to 10V 0V 10V
0 to 5V 0V 5V
1 to 5V 1V 5V
1 to 5V (extended mode) 1V 5V
-10 to 10V -10V 0V 10V
User range setting Analog input value equivalent to
the digital output value of -32000
Analog input value set as an
offset value
Analog input value set as a gain
value
Current 0 to 20mA 0mA 20mA
4 to 20mA 4mA 20mA
4 to 20mA (extended mode) 4mA 20mA
User range setting Analog input value equivalent to
the digital output value of -32000
Analog input value set as an
offset value
Analog input value set as a gain
value
Input signal error detection upper limit value - Gain value of each range
Gain value of each range - Offset value of each range
× 1000
=
Input signal error detection
upper limit setting value
Lower limit value of each range - Input signal error detection lower limit value
Gain value of each range - Offset value of each range
× 1000=
Input signal error detection
lower limit setting value