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Auxiliary Area Section 9-11
■ RS-232C Port Communications Information
■ Serial Device Communications Information
Instruction-related Information
Name Address Description Access
RS-232C Port Communica-
tions Error Flag
A39204 ON when a communications error has occurred at the RS-
232C port.
Note This flag is disabled in 1:N NT Link or PLC Link Mas-
ter/Slave mode.
Read-only
RS-232C Port Restart Bit A52600 Turn this bit ON to restart the RS-232C port. Read/write
RS-232C Port Settings
Change Bit
A61902 ON while the RS-232C port’s communications settings are
being changed.
Read/write
RS-232C Port Error Flags A52800 to
A52807
These flags indicate what kind of error has occurred at the
RS-232C port.
Read/write
RS-232C Port Send Ready
Flag
(No-protocol mode)
A39205 ON when the RS-232C port is able to send data in no-proto-
col mode.
Read-only
RS-232C Port Reception
Completed Flag
(No-protocol mode)
A39206 ON when the RS-232C port has completed the reception in
no-protocol mode.
Read-only
RS-232C Port Reception
Overflow Flag
(No-protocol mode)
A39207 ON when a data overflow occurred during reception through
the RS-232C port in no-protocol mode.
Read-only
RS-232C Port PT Communi-
cations Flags
A39300 to
A39307
The corresponding bit will be ON when the RS-232C port is
communicating with a PT in NT link mode. Bits 0 to 7 corre-
spond to units 0 to 7.
Read-only
RS-232C Port PT Priority
Registered Flags
A39308 to
A39315
The corresponding bit will be ON for the PT that has priority
when the RS-232C port is communicating in NT link mode.
Bits 0 to 7 correspond to units 0 to 7.
Read-only
RS-232C Port Reception
Counter
(No-protocol mode)
A39300 to
A39315
Indicates (in binary) the number of bytes of data received
when the RS-232C port is in no-protocol mode.
Read-only
Name Address Description Access
Communications Units 0 to
15, Ports 1 to 4 Settings
Change Bits
A62001 to
A63504
The corresponding flag will be ON when the settings for that
port are being changed.
(Bits 1 to 4 in A620 to A635 correspond to ports 1 to 4 in
Communications Units 0 to 15.)
Read/write
Name Address Description Access
Step Flag A20012 ON for one cycle when step execution is started with
STEP(008).
Read-only
Current EM Bank (CJ1 and
CJ1-H CPU Units only.)
A301 This word contains the current EM bank number in 4-digit
hexadecimal.
Read-only
Macro Area Input Words A600 to
A603
When MCRO(099) is executed, it copies the input data from
the specified source words (input parameter words) to A600
through A603.
Read/write
Macro Area Output Words A604 to
A607
After the subroutine specified in MCRO(099) has been exe-
cuted, the results of the subroutine are transferred from
A604 through A607 to the specified destination words (out-
put parameter words).
Read/write
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