738
Auxiliary Area Allocations by Address
Appendix D
Note
The following flags are provided in a special read-only area and can be specified with the labels given in
the table. These flags are not contained in the Auxiliary Area. Refer to 4-14 Condition Flags and 4-15
Clock Pulses for details.
Flag area
Name
Label
Meaning
Condition Code
Area
Error Flag
ER
Turns ON when an error occurs in processing an instructions, indi-
cating an error end to the instruction.
Access Error Flag
AER
Turns ON when an attempt is made to access an illegal area. The
status of this flag is maintain only during the current cycle and only
in the task in which it occurred.
Carry Flag
CY
Turns ON when there is a carry or borrow in a math operation,
when a bit is shifted into the Carry Flag, etc.
Greater Than Flag
>
Turns ON when the result of comparing two values is “greater
than”, when a value exceeds a specified range, etc.
Equals Flag
=
Turns ON when the result of comparing two values is “equals”,
when the result of a math operation is 0, etc.
Less Than Flag
<
Turns ON when the result of comparing two values is “less than”,
when a value is below a specified range, etc.
Negative Flag
N
Turns ON when the MSB in the result of a math operation is 1.
Overflow Flag
OF
Turns ON when the result of a math operation overflows.
Underflow Flag
UF
Turns ON when the result of a math operation underflows.
Greater Than or Equals
Flag
>=
Turns ON when the result of comparing two values is “greater than
or equals”.
Not Equal Flag
<>
Turns ON when the result of comparing two values is “not equal”.
Less than or Equals Flag
<=
Turns ON when the result of comparing two values is “less than or
equals”.
Always ON Flag
A1
This flag is always ON.
Always OFF Flag
A0
This flag is always OFF.
Clock Pulse
Area
0.02-s clock pulse
0.02s
Repeatedly turns ON for 0.02 s and OFF for 0.02 s.
0.1-s clock pulse
0.1s
Repeatedly turns ON for 0.1 s and OFF for 0.1 s.
0.2-s clock pulse
0.2s
Repeatedly turns ON for 0.2 s and OFF for 0.2 s.
1-s clock pulse
1s
Repeatedly turns ON for 1 s and OFF for 1 s.
1-min clock pulse
1min
Repeatedly turns ON for 1 min and OFF for 1 min.
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: ......