Set Data; Writing Analog Output Conversion Values - Omron CP1L-EL20DR-D Operation Manual

Analog Output Units
Writing Analog Output
Conversion Values
Startup Operation
480

■ Set Data

• The Analog Output Unit will not start converting analog output values until
the set data has been written.
• Before the range code is written, 0 V or 0 mA will be output in the 0 to 10
V, −10 to +10 V, and 0 to 20 mA ranges, and 1 V or 4 mA will be output in
the 1 to 5 V and 4 to 20 mA ranges.
• Once the range code has been set, it is not possible to be changed while
power is being supplied to the CPU Unit. To change the range code, turn
the CPU Unit OFF then ON again.
The ladder program can be used to write conversion data to the output words.
The output word starts from "n+1" where "n" is the last output word allocated
to the CPU Unit, or previous Expansion Unit or Expansion I/O Unit.
After power is turned ON, it will require two cycle times plus approximately
50 ms before the first conversion data is output.
The following table shows the output status after the initial processing is com-
pleted.
Output type
Output range 0 to 10 V,
−10 to +10 V
Before range 0 V
code is written
After range 0 V
code is written
Therefore, create a program as shown below, so that when operation begins
simultaneously with startup it will wait for valid set data.
Always ON Flag
P_On
T0005
Range code Analog output range
−10 to 10 V
000
001 0 to 10 V
010 1 to 5 V
011 0 to 20 mA
100 4 to 20 mA
Output use
0 No
1
Yes
Voltage output
1 to 5 V 0 to 20 mA
0 mA
1 V 0 mA
TIM0005 is started when the power is
turned ON. After 0.2 s (200 ms) elapses,
TIM
the TIM0005 contact turns ON, and the
0005
data stored in D100 will be moved to
102 as the conversion data for analog
#0002
output 1.
MOV(021)
D100
102
Section 9-3
Current output
4 to 20 mA
4 mA