Omron CRT1 - 10-2009, Operation Manual

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510
Analog I/O Slave Unit (input) Functions
Section 11-4
User Scaling
Analog input values (count values) are 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
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
–
28,000 to 28,000, but make sure that underflow or
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.
Setting Using the CX-Integrator
1,2,3... 1. Turn ON the power supply to the CompoNet Slave Unit.
Input
range
0 to 5 V 0 to 10 V 1 to 5 V
−
10 to 10 V
(CRT1-
AD04 only)
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 0000 hex 0000 hex 7FFF hex 0000 hex 0000 hex 7FFF hex
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)