Omron CP1H-CPU - 05-2006, Руководство по эксплуатации

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Analog I/O (XA CPU Units)
Section 5-5
4. Creating a Ladder Program
I/O Allocation I/O conversion data is stored in CIO words between CIO 200 and CIO 211.
The analog voltage inputs are converted to digital values and output to CIO
words CIO 200 to CIO 203.
The digital values in CIO 210 and CIO 211 are converted (D/A conversion)
and output as analog voltage or analog current outputs.
Auxiliary Area Flags Auxiliary Area bits A434.00 to A434.03 are used as open-circuit detection
flags for the open-circuit detection function.
The Analog Initialization Completed Flag (A434.04) indicates when the built-in
analog I/O has been initialized.
Reading Converted
Analog Input Data The ladder program can be used to read the memory area words where the
converted values are stored. The converted digital values are output to CIO
200 to CIO 203.
Writing Analog Output SV
Data The ladder program can be used to write data to the memory area words
where the set value is stored. Write the output SV data to CIO 210 to CIO
211.
The Analog Initialization Completed Flag (A434.04) indicates when the built-in
analog I/O has been initialized.
Startup Operation After power is turned ON, it takes approximately 1.5 s before the initial data is
converted and stored in the input words. The Analog Initialization Completed
Flag (A434.04) will go ON when initial processing is completed. If the system
starts operating, use this flag in the program to delay reading converted data
from analog inputs until the data is valid.
Data Word Content
I/O point For 1/6,000
resolution
For 1/12,000
resolution
A/D conver-
sion data CIO 200 Analog input 0
−
10 to 10 V range:
F448 to 0BB8 hex
Other ranges:
0000 to 1770 hex
−
10 to 10 V range:
E890 to 1770 hex
Other ranges:
0000 to 2EE0 hex
CIO 201 Analog input 1
CIO 202 Analog input 2
CIO 203 Analog input 3
D/A conver-
sion data CIO 210 Analog output 0
CIO 211 Analog output 1
Bit Function
A434.00 Analog Input 0 Open-circuit Error Flag 0: No error
1: Open-circuit error detected
A434.01 Analog Input 1 Open-circuit Error Flag
A434.02 Analog Input 2 Open-circuit Error Flag
A434.03 Analog Input 3 Open-circuit Error Flag
Bit Function
A434.04 Analog Initialization Completed Flag 0: Initializing
1: Initialization completed
Bit Function
A434.04 Analog Initialization Completed Flag 0: Initializing
1: Initialization completed