Omron CRT1 - 10-2008 Operation Manual page 446

Analog I/O Slave Unit Functions
User Scaling
Offset Compensation
Lower limit: 8000 hex (−32768)
Setting Using the CX-Integrator
1,2,3...
Analog input values (count values) are scaled to user-defined values. The
conversion values for 100% and 0% are set using the CX-Integrator.
Input 0 to 5 V
range
100% Set using CX-Integrator (–28,000 to 28,000)
0% Set using CX-Integrator (–28,000 to 28,000)
Discon- 0000 hex
nected
line
Value for 100% set by user
(Scaling point 2)
Value for 0% set by user
(Scaling point 1)
Note Reverse scaling, where the 0% scaling value is higher than the 100% scaling
value, is also supported.
Scaling the analog input values of linear sensors to distances produces
mounting error in the sensor. Offset compensation compensates for the error
that occurs during scaling. 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
overflow does not occur. 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.
Upper limit: 7FFE hex (32766)
100% scaling value
0% scaling
1. Turn ON the power supply to the CompoNet Slave Unit.
0 to 10 V 1 to 5 V
0000 hex 7FFF hex 0000 hex
Scaling value
Conversion
0%
28,000 to 28,000, but make sure that underflow or
–
Offset value
(–28,000 to 28,000)
0%
Section 11-4
−10 to 10 V
0 to
(CRT1- 20 mA
AD04 only)
0000 hex 7FFF hex
Input signal range
100%
Scaled line
100% Input signal range
4 to
20 mA
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