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407
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 CP1L-L14D Series
Страница 2: ...CP1L L14D CP1L L20D CP1L M30D CP1L M40D CP1L CPU Unit Operation Manual Revised June 2007...
Страница 3: ...iv...
Страница 9: ...x...
Страница 13: ...xiv TABLE OF CONTENTS...
Страница 21: ...xxii...
Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 153: ...120 CP CPM1A series Expansion I O Unit Wiring Section 3 6...
Страница 523: ...490 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...498 Replacing User serviceable Parts Section 10 2...
Страница 563: ...530 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...578 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...605 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...606 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...636 Index...
Страница 671: ...638 Revision History...