Omron CP1L CPU UNIT - 06-2007 Operation Manual page 447

Analog Output Units
Allocation of Output
Words
Writing the Range Code
414
3. Ladder Program
Four output words are allocated, beginning from the first word following the
last I/O word allocated to the CPU Unit or already-connected Expansion I/O
Unit or Expansion Unit.
Analog Output Unit
Words n+1 to n+4
Write the output use and the range code to words n+1 and n+2. The D/A con-
version will start when the set data is transferred from the CPU Unit to the
Analog Output Unit.
15
Wd n+1
1 0
15
1 0
Wd n+2
■ Range Code
• The Analog Input Unit will not start converting analog I/O values until the
range code has been written. The output will be 0 V or 0 mA.
• From when the range code has been written until data in the analog out-
put convertible range 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 change the setting
while power is being supplied to the CPU Unit. To change the I/O range,
turn the CPU Unit OFF then ON again.
0
8 7
0 0 0 0 0 0
Analog input 2
Set to 1.
0 8 7
0
0 0 0 0 0
Analog input 4
Set to 1.
Range code Analog input signal range
−10 to 10 V
000
001 0 to 10 V
010
011 0 to 20 mA
100 4 to 20 mA
Output use
0
No
1
Yes
Section 7-3
6 5 4 3 2 1
Analog input 1
6 5 4 3 2 1
Analog input 3
1 to 5 V