Omron CP1L-EL20DR-D, Руководство по эксплуатации

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Analog Output Units Section 9-3
■
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.
Writing Analog Output
Conversion Values 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.
Startup Operation 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.
Therefore, create a program as shown below, so that when operation begins
simultaneously with startup it will wait for valid set data.
0
1
Range code Analog output range
−
10 to 10 V
0 to 10 V
1 to 5 V
0 to 20 mA
4 to 20 mA
000
001
010
011
100
Output use
No
Yes
Output type Voltage output Current output
Output range 0 to 10 V,
−
10 to +10 V
1 to 5 V 0 to 20 mA 4 to 20 mA
Before range
code is written 0 V 0 mA
After range
code is written 0 V 1 V 0 mA 4 mA
MOV(021)
D100
102
P_On
Always ON Flag
T0005
0005
TIM
#0002
TIM0005 is started when the power is
turned ON. After 0.2 s (200 ms) elapses,
the TIM0005 contact turns ON, and the
data stored in D100 will be moved to
102 as the conversion data for analog
output 1.