Omron CJ2 CPU UNIT SOFTWARE User Manual page 615

Address
Name
Words Bits
A339 --- Maximum Differ-
and entiation Flag
A340 Number
A343 A343.00 Memory Card
to Type
A343.02
A343.06 EM File Memory
Format Error
Flag
A343.07 Memory Card
Format Error
Flag
A343.08 File Transfer
Error Flag
A343.09 File Write Error
Flag
A343.10 File Read Error
A343.11 File Missing Flag
A343.13 File Memory
Operation Flag
A343.14 Accessing File
Data Flag
A343.15 Memory Card
Detected Flag
CJ2 CPU Unit Software User's Manual
Function
These words contain the maximum value of the differentiation flag
numbers being used by differentiation instructions.
Indicates the type of Memory Card, if any, installed.
0: None
4: Flash ROM
This information is recorded when the PLC power is turned ON or
the Memory Card power switch is turned ON.
ON when a format error occurs in the first EM bank allocated for
file memory.
ON: Format error
OFF: No format error
The flag is turned OFF when formatting is completed normally.
ON when the Memory Card is not formatted or a formatting error
has occurred. (The flag is turned OFF when formatting is com-
pleted normally.)
ON: Format error
OFF: No format error
This flag is written when the PLC power is turned ON or the Mem-
ory Card power switch is turned ON.
ON when an error occurred while writing data to file memory.
ON: Error
OFF: No error
ON when data cannot be written to file memory because it is
write-protected or the data exceeds the capacity of the file mem-
ory.
ON: Write not possible
OFF: Normal condition
ON when a file could not be read because of a malfunction (file is
damaged or data is corrupted).
ON: Read not possible
OFF: Normal condition or read processing is being executed
ON when an attempt is made to read a file that does not exist, or
an attempt is made to write to a file in a directory that does not
exist.
ON: Specified file or directory is missing
OFF: Normal condition or read processing is being executed
ON while any of the following operations is being executed. OFF
when none of them are being executed.
CMND instruction sending a FINS command to the local CPU
Unit.
Execution of a File Memory instruction.
Program replacement using the control bit in the Auxiliary Area.
Easy backup operation.
ON: Instruction being executed.
OFF: Instruction not being executed.
ON while file data is being accessed.
ON: File being accessed
OFF: File not being accessed
Use this flag to prevent two file memory instructions from being
executed at the same time.
ON when a Memory Card has been detected.
OFF when a Memory Card has not been detected.
ON: Memory Card detected
OFF: Memory Card not detected
Appendices
Status Write timing/
Status at
after mode Related flags, set-
startup
change tings
See Func- Cleared Written at the start
tion col- of operation
umn.
A295.13
Retained See See Function col-
Function umn.
column.
Retained Cleared ---
Retained See See Function col-
Function umn.
column.
Retained Cleared Refreshed when file
data is written.
Retained Cleared Refreshed when file
data is written.
Retained Cleared Refreshed when file
data is read.
Retained Cleared Refreshed when file
data is read.
Retained Cleared Refreshed when file
memory instruction
is executed.
Retained Cleared ---
Retained Cleared Refreshed when
Memory Card is
inserted, or the
power is turned ON.
A-131