397
Analog Input Units
Section 7-2
■
Set Data
• The Analog Input Unit will not start converting analog I/O values until the
range code has been written.
• 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.
Averaging
Set whether averaging is to be used for set data. When the averaging bit is set
to 1, the average (moving average) for the past eight inputs is output as con-
version data.
Reading Analog Input
Conversion Values
Read the conversion value storage area with the ladder program. With word m
as the last input word allocated to the CPU Unit or an already-connected
Expansion Unit, the A/D conversion data will be output to the following words
m+1 to m+4.
Startup Operation
After the power is turned ON, it will require two cycle times plus approximately
50 ms before the first conversion data is stored in the input words. Therefore,
create a program as shown below, so that when operation begins simulta-
neously with startup it will wait for valid conversion data.
The analog input data will be 0000 until the initial processing is completed.
Handling Unit Errors
• When an error occurs in an Analog Input Unit, the analog input conversion
data becomes 0000.
15 0
1 0 0 0 0 0 0
8 7 6 5 4 3 2 1
15 0
1 0 0 0 0 0 0
8 7 6 5 4 3 2 1
0
0
Set to 1.
Set to 1.
Wd (n+1)
Wd (n+2)
Analog input 1
Analog input 2
Analog input 3
Analog input 4
Averaging
0
No
1
Yes
Input Use
0
No
1
Yes
Range code
Analog input signal range
−
10 to 10 V
0 to 10 V
1 to 5 V or 4 to 20 mA
0 to 5 V or 0 to 20 mA
00
01
10
11
MOV(021)
2
D 0
T 5
#0002
T5
Power ON
P_On
TIM5 is started when the power is
turned ON. After 0.1 to 0.2 s (100 to
200 ms) elapses, the TIM5 contact
turns ON and the analog input 1 con-
version data stored in word 2 is trans-
ferred to DM0.
Содержание CP1H CPU UNITS - PROGRAMMING 05-2007
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Страница 34: ...xxxiv Conformance to EC Directives 6...
Страница 174: ...140 CP series Expansion I O Unit Wiring Section 3 6...
Страница 370: ...336 Analog I O XA CPU Units Section 5 5...
Страница 552: ...518 Trouble Shooting Section 8 7...
Страница 595: ...561 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
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Страница 642: ...608 Standard Models Appendix A...
Страница 643: ...609 Appendix B Dimensions Diagrams X XA and Y CPU Units 90 100 110 140 150 8 85 Four 4 5 dia holes...
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Страница 745: ...711 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 746: ...712 Connections to Serial Communications Option Boards Appendix F...
Страница 776: ...742 PLC Setup Appendix G...
Страница 778: ...744 Specifications for External Power Supply Expansion Appendix H...
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