A-1-6 Maximum/Minimum Value For When Input Disconnection Occurs During Process Value Scaling With Negative Bias; A-1-7 Hysteresis During Square Root Calculations - Omron CJ Series Operation Manual

Appendices
A-1-6 Maximum/Minimum Value for when Input Disconnection Occurs
during Process Value Scaling with Negative Bias
If an input is disconnected during process value scaling with negative bias, either the maximum or min-
imum process value will be specified.
If the data overrange direction is high, the maximum process value will be specified.
If the data overrange direction is low, the minimum process value will be specified.
4600 (115%)
4000 (100%)
0 (0%)
−600 (−15%)
1.6 mA
Applicable Units
* With the CJ1W-AD04U, the upper and lower limits of process values are 4200 (105%) and −200 (−5%), respec-
tively.
A-1-7 Hysteresis during Square Root Calculations
During square root calculation function, outputs of approximately 7% or less have linear characteristics
(i.e., output = input). Hysteresis exists, however, when switching between square root characteristics
and linear characteristics, as shown below.
During input rise: Switching from linear characteristics to square root characteristics at 0.5% input (out-
put of approximately 7%).
During input fall: Switching from square root characteristics to linear characteristics at 0.3% input (out-
put of approximately 5.5%).
A-6
Process value (stored data)
If the high value is set, the maximum
value of 4600 will be specified when an
input is disconnected.
Process value scaling with negative bias
4 mA
Isolated-type Universal Input Units
Output
7%
5.5%
2%
Linear
0.5%
0.3%
CJ-series Analog I/O Units Operation Manual for NJ-series CPU Unit(W498)
Input signal
If the low value is set, the minimum value
of −600 will be specified when an input is
disconnected.
20 mA 22.4 mA
CJ1W-AD04U *
CJ1W-PH41U
Square root calculation
Input