480
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.
Summary of Contents for CP1L-EL20DR-D
Page 3: ...CP1L EL20D CP1L EM30D CP1L EM40D CP1L EL EM CPU Unit Operation Manual Produced July 2017...
Page 4: ...iv...
Page 10: ...x...
Page 22: ...xxii...
Page 34: ...xxxiv Software Licenses and Copyrights 7...
Page 192: ...158 Trial Operation and Debugging Section 5 3...
Page 250: ...216 Automatic Clock Adjustment and Specifying Servers by Host Name Section 6 7...
Page 666: ...632 Trouble Shooting Section 11 7...
Page 696: ...662 Standard Models Appendix A...
Page 805: ...771 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 806: ...772 Connections to Serial Communications Option Boards Appendix F...
Page 836: ...802 PLC Setup Appendix G...
Page 838: ...804 TCP Status Transitions Appendix H...
Page 840: ...806 Ethernet Network Parameters Appendix I...
Page 842: ...808 Buffer Configuration CP1L EL EM Appendix J...
Page 844: ...810 Ethernet Specifications Appendix K...
Page 851: ...Index 817 work words 118 write protection 447...
Page 852: ...818 Index...
Page 854: ...820 Revision History...
Page 855: ......