Omron CP1E CPU UNIT SOFTWARE - Page 419

A-65
Appendices
CP1E CPU Unit Software User’s Manual(W480)
A-2 Auxiliary Area Allocations by Address
App
A-2-1 Read-only Words
A392 04 Built-in RS-232C Port
Error Flag (CP1E
N/NA-type CPU Unit
only)
ON when an error has occurred at the
built-in RS-232C port. (Not valid in NT
Link mode.)
ON: Error
OFF: No error
Retained Cleared Refreshed
when error
occurs.
05 Built-in RS-232C Port
Send Ready Flag
(No-protocol mode)
(CP1E N/NA-type CPU
Unit only)
ON when the built-in RS-232C port is
able to send data in no-protocol mode.
ON: Able-to-send
OFF: Unable-to-send
Retained Cleared Written after
transmission
06 Built-in RS-232C Port
Reception Completed
Flag (No-protocol
mode) (CP1E
N/NA-type CPU Unit
only)
ON when the built-in RS-232C port has
completed the reception in no-protocol
mode.
• When the number of bytes was
specified: ON when the specified
number of bytes is received.
• When the end code was specified:
ON when the end code is received or
256 bytes are received.
ON: Reception com-
pleted
OFF: Reception not
completed
Retained Cleared Written after
reception
07 Built-in RS-232C Port
Reception Overflow
Flag (No-protocol
mode) (CP1E
N/NA-type CPU Unit
only)
ON when a data overflow occurred dur-
ing reception through the built-in
RS-232C port in no-protocol mode.
• When the number of bytes was
specified: ON when more data is
received after the reception was
completed but before RXD was exe-
cuted.
• When the end code was specified:
ON when more data is received after
the end code was received but
before RXD was executed.
ON when 257 bytes are received
before the end code.
ON: Overflow
OFF: No overflow
Retained Cleared
12 Serial Option Port
Communications Error
Flag (CP1E N30/40/60
or NA20 CPU Unit
only)
ON when a communications error has
occurred at the Serial Option port. (Not
valid in NT Link mode.)
ON: Error
OFF: No error
Retained Cleared
13 Serial Option Port
Send Ready Flag
(No-protocol Mode)
(CP1E N30/40/60 or
NA20 CPU Unit only)
ON when the Serial Option port is able
to send data in no-protocol mode.
ON: Able-to-send
OFF: Unable-to-send
Retained Cleared Written after
transmission
14 Serial Option Port
Reception Completed
Flag (No-protocol
mode) (CP1E
N30/40/60 or NA20
CPU Unit only)
ON when the Serial Option port has
completed the reception in no-protocol
mode.
• When the number of bytes was
specified: ON when the specified
number of bytes is received.
• When the end code was specified:
ON when the end code is received or
256 bytes are received.
ON: Reception com-
pleted
OFF: Reception not
completed
Retained Cleared Written after
reception
15 Serial Option Port
Reception Overflow
Flag (No-protocol
mode) (CP1E
N30/40/60 or NA20
CPU Unit only)
ON when a data overflow occurred dur-
ing reception through Serial Option
port in no-protocol mode.
• When the number of bytes was
specified: ON when more data is
received after the reception was
completed but before RXD was exe-
cuted.
• When the end code was specified:
ON when more data is received after
the end code was received but
before RXD was executed.
ON when 257 bytes are received
before the end code.
ON: Reception com-
pleted
OFF: Reception not
completed
Retained Cleared
Address
Name Function Settings
Status
after
mode
change
Status at
startup
Write
timing
Related
flags,
settings
Words Bits