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571
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.
Содержание CP1L - 12-2007
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Страница 33: ...xxxiv Conformance to EC Directives 6...
Страница 65: ...32 Function Blocks Section 1 5...
Страница 428: ...395 Clock Section 6 9...
Страница 429: ...396 Clock Section 6 9...
Страница 523: ...488 Troubleshooting Unit Errors Section 9 4...
Страница 531: ...496 Replacing User serviceable Parts Section 10 2...
Страница 563: ...528 Auxiliary Area Allocations by Function Appendix C...
Страница 611: ...576 Auxiliary Area Allocations by Address Appendix D...
Страница 638: ...603 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Страница 639: ...604 Connections to Serial Communications Option Boards Appendix F...
Страница 669: ...634 Index...
Страница 671: ...636 Revision History...