Omron CRT1 - 10-2009, Operation Manual

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531
Analog I/O Slave Unit (output) Functions
Section 11-5
User Scaling
User scaling allows analog output values to be scaled to user-defined values.
The conversion values for 100% and 0% are set using the CX-Integrator.
Note Reverse scaling, where the 0% scaling value is higher than the 100% scaling
value, is also supported.
Offset Compensation
Offset compensation is used to compensate for error that occurs during scal-
ing. The offset amount is added to the scaled line before processing, as
shown in the following diagram. The offset (error) value can be input between
–
28,000 and 28,000, but if underflow or overflow occurs in the scaled line, the
100% or 0% output will not be possible. The High Limit is 7FFE hex and the
Low Limit is 8000 hex.
Note The offset value can be set even when using default scaling.
Input
range
0 to 5 V 0 to 10 V 1 to 5 V –10 to
10 V
0 to
20 mA
4 to
20 mA
100% Set using CX-Integrator (–28,000 to 28,000)
0% Set using CX-Integrator (–28,000 to 28,000)
Discon-
nected
line --- --- 7FFF hex --- --- 7FFF hex
Scaling value
100% value set by user
(scaling point 2)
Output conversion
0% value set by user
(scaling point 1)
Output signal ran
0%
100%
Lower limit 8000 hex (
−
32768)
0% 100%
Upper limit 7FFE hex (32766)
100% scaling value
Scaling line
Offset value
(–28,000 to +28,000)
Cannot output 100% value
even if it is set to 7FFF.
Output (signal) range
0% scaling value