Omron CRT1 - 10-2008, Operation Manual

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Temperature Input Unit Functions Section 11-5
11-5-2 Scaling
Scaling can be used to convert the temperature input values (measured val-
ues) to display values at the scale required by the user. Scaling also elimi-
nates the need for ladder programming in the Master Unit to perform these
basic math operations.
To scale the temperature input values to the scale required by the user, use
the CX-Integrator to set the conversion values (
−
28,000 to 28,000) for two
points in the scale (the 100% value and 0% value).
Note 1. The default values are 0 and 28,000.
2. Reverse scaling, where the 0% scaling value is higher than the 100% scal-
ing value, is also supported.
Offset Compensation The scaling function is equipped with offset compensation, which can com-
pensate for any error that occurs during scaling. The offset amount is added
to the scaled line as shown in the following diagram. The offset value can be
input between
−
28,000 to 28,000. Make sure that underflow or overflow does
not occur. The High Limit is 7FFE hex and the Low Limit is 8000 hex. (The
High Limit is 7FFFFFFE Hex and the Low Limit is 80000000 Hex for 1/100
Display Mode.)
Note The offset value can be set even when using default scaling.
Setting Using CX-Integrator
1,2,3... 1. Turn ON the power supply to the Temperature Input Unit.
2. Double-click the icon of the Temperature Input Unit to be set in the Network
Configuration Window or right-click the icon and select
Parameter - Edit .
The Configuration Window will be displayed.
0% 100%
Scaling value
Value for 100% set by user
(Scaling point 2)
Conversion
Value for 0% set by user
(Scaling point 1)
Input signal range
Upper limit: 7FFE hex (32766)
100% scaling value
Scaled line
0% scaling
Offset value
(–28,000 to 28,000)
Input signal range
0%
100%
Lower limit: 8000 hex (
−
32768)