Omron CRT1 - 10-2009, Operation Manual

Page: 533 / 675

509
Analog I/O Slave Unit (input) Functions
Section 11-4
4. Return to the General Tab Page, click the Transfer [PC to Unit] Button to
download the data, and then click the Reset Button to reset the Unit.
5. Click the OK Button and exit the window.
11-4-3 Scaling
Description
The default setting is used to perform AD conversion of analog input values,
scaling them to a count between 0 and 6,000. Scaling can be used to change
scaled values that correspond to the input signal range into other values
required by the user (industry unit values). Scaling also eliminates the need
for ladder programming in the Master Unit to perform math operations. The
following two methods of input scaling can be used.
Default Scaling
Analog input values (count values) are converted to the original voltage and
current values. The units used are mV or
µ
A. When default scaling is
selected, scaling is performed according to the range used, as shown in the
following table.
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% 5,000 mV 10,000
mV 5,000 mV 10,000 mV 20,000
µ
A 20,000
µ
A
0% 0000 mV 0000 mV 1,000 mV –10,000 mV 0000
µ
A 4,000
µ
A
Discon-
nected
line 0000 hex 0000 hex 7FFF hex 0000 hex 0000 hex 7FFF hex