408
Analog I/O Units
Section 7-4
Setting D/A Conversion Data
Output data is written to the Analog I/O Unit’s allocated output word, word
n+1.
Note
Word (n + 1) can be used for either the range code or the analog output set
value.
1,2,3...
1.
The set value range is 0000 to 00FF hex when the output signal range is 0
to 10 V/4 to 20 mA.
2.
The set value range is divided into two parts: 8000 to 80FF hex (
−
10 to 0
V) and 0000 to 00FF hex (0 to 10 V) when the output signal range is
−
10
to 10 V.
3.
If FF
@@
is input, 0 V/4 mA will be output.
4.
If an output value is specified, the following bits will be ignored.
• Output range of
−
10 to 10 V: Bits 08 to 14
• Output range of 0 to 10 V/4 to 20 mA: Bits 08 to 15
Startup Operation
After power is turned ON, it will require two cycle times plus approx. 100 ms
before the first data is converted. The following instructions can be placed at
the beginning of the program to delay reading converted data from analog
inputs until conversion is actually possible.
Analog input data will be 0000 until initial processing has been completed.
Analog output data will be 0 V or 0 mA until the range code has been written.
After the range code has been written, the analog output data will be 0 V or
4 mA if the range is 0 to 10 V,
−
10 to 10 V, or 4 to 20 mA.
MOV(21)
MOVE instruction
Ladder program
Word n + 1
CPU Unit
Analog I/O Unit
(See note.)
•
Writes the range code
•
Writes the set value
Range code
Analog output set value
"n" is the last output word allocated to the CPU
Unit, or previous Expansion Unit or Expansion I/O
Unit.
Analog devices
•
Adjustment equipment
•
Servo Controller
•
Variable speed device
•
Recorder
•
Other
n + 1
15
00
Sign bit
(Used when the
output signal range is
−
10 to 10 V.)
Set value (00 to FF hex)
Summary of Contents for CP1H-CPU - 05-2006
Page 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Page 3: ...iv...
Page 11: ...xii TABLE OF CONTENTS...
Page 15: ...xvi...
Page 19: ...xx...
Page 31: ...xxxii Conformance to EC Directives 6...
Page 71: ...40 Function Blocks Section 1 5...
Page 133: ...102 Computing the Cycle Time Section 2 7...
Page 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Page 411: ...380 Clock Section 6 8...
Page 519: ...488 Replacing User serviceable Parts Section 10 2...
Page 527: ...496 Standard Models Appendix A...
Page 535: ...504 Dimensions Diagrams Appendix B...
Page 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Page 659: ...628 PLC Setup Appendix G...
Page 665: ...634 Index work words 159 write protection 370...
Page 667: ...636 Revision History...