Omron CP1E CPU UNIT SOFTWARE - Auxiliary Area (A)

5-17
5 I/O Memory
CP1E CPU Unit Software User’s Manual(W480)
5-8 Auxiliary Area (A)
5
5-8 Auxiliary Area (A)
The words and bits in this area have preassigned functions.
Refer to A-2 Auxiliary Area Allocations by Address for details.
Precautions for Safe Use
• With an E-type CPU Unit or with an N/NA-type CPU Unit without a Battery, the contents of the
DM Area (D) *, Holding Area (H), the Counter Present Values (C), the status of Counter Com-
pletion Flags (C), and the status of bits in the Auxiliary Area (A) related to clock functions may
be unstable when the power supply is turned ON.
* This does not apply to areas backed up to EEPROM using the DM backup function.
If the DM backup function is being used, be sure to refer to 3-2-4 Initializing I/O Memory at
Startup for details.
• Words in the Auxiliary Area related to clock function are unstable.
The Auxiliary Area contains 754 words with addresses ranging from A0 to A753.
Overview
Bit/word Name
Power interruption time CPU Unit
Within I/O
memory
backup time
Longer than
I/O memory
backup time
E-type CPU
Unit
N/NA-type
CPU Unit
A100 to A199 Error Log Area Retained Unstable Supported Supported
A300 Error Log Pointer Supported
A351 to A354 Calendar/Clock Area Not provided.
A510 to A511 Startup Time Not provided.
A512 to A513 Power Interruption Time Not provided.
A514 Number of Power Interruptions Supported
A515 to A517 Operation Start Time Not provided.
A518 to A520 Operation End Time Not provided.
A720 to A749 Power ON Clock Data 1 to 10 Not provided.
Notation
Range
Bit number: 02
A 20. 02
Word number: 20
I/O memory area designator: A