Setting Input Specifications - Omron E5AK User Manual

CHAPTER 3 BASIC OPERATION

3.2 Setting Input Specifications

J Input type
J Scaling
F Input shift
About the tempera-
ture unit
3--4
· Set the type No. (0 to 21) in the "input type" parameter. The factory set-
ting is "2: K1 (thermocouple)."
· For details on input types and setting ranges, see page 5-26.
· When the voltage input and current input are selected, scaling matched
to the control is required.
· The "scaling upper limit", "scaling lower limit" and "decimal point"
parameters (setup mode) are use for scaling.
· The "scaling upper limit" parameter sets the physical quantity to be
expressed by the upper limit value of input, and the "scaling lower limit"
parameter sets the physical quantity to be expressed by the lower limit
value of input. The "decimal point" parameter sets the number of digits
past the decimal point.
· The following figure shows scaling example of 4 to 20 mA input. After
scaling, the humidity can be directly read. In this case, the "decimal
point" parameter is set to "1".
Readout (humidity)
Scaling upper limit
value (95.0%)
Scaling lower limit
value (10.0%)
0
· When temperature input is selected, scaling is not required. This is
because input is treated as the "temperature" as it is matched to the
input type. However, note that the upper and lower limit values of the
sensor can be shifted. For example, if both the upper and lower limit val-
ues are shifted by 1.2_C, the process value (before shift) is regarded as
201.2_C after shift when input is 200_C before shift.
· To set input shift, set shift values in the "input shift upper limit" and
"input shift lower limit" parameters (level 2 mode).
Temperature
Upper limit value
Lower limit value
0
To switch the temperature unit from "_C" to "_F" for temperature unit, switch the
setting of the _C/_F selection" parameter to [
Input (4 to 20 mA)
100%FS
Input shift upper limit value
After shift
Before shift
Input shift lower
limit value
100
] from [
Input (%FS)
].