636
Auxiliary Area Allocations by Function Appendix C
Serial Port 2 Information
Serial Device Information
Name Address Description Access Updated
RS-232C Port Communica-
tions Error Flag
A392.04 ON when a communications error has occurred at the
serial port 2.
Read-only
RS-232C Port Restart Bit A526.00 Turn this bit ON to restart the serial port 2. Read/write
RS-232C Port Settings
Change Bit
A619.02 ON while the serial port 2’s communications settings are
being changed.
Read/write
RS-232C Port Error Flags A528.00 to
A528.07
These flags indicate what kind of error has occurred at
the serial port 2.
Read/write
RS-232C Port Send Ready
Flag
(No-protocol mode)
A392.05 ON when the serial port 2 is able to send data in no-pro-
tocol mode.
Read-only
RS-232C Port Reception
Completed Flag
(No-protocol Mode)
A392.06 ON when the serial port 2 has completed the reception in
no-protocol mode.
Read-only
RS-232C Port Reception
Overflow Flag
(No-protocol mode)
A392.07 ON when a data overflow occurred during reception
through the serial port 2 in no-protocol mode.
Read-only
RS-232C Port PT Communi-
cations Flags
A393.00 to
A393.07
The corresponding bit will be ON when the serial port 2
is communicating with a PT in NT link mode.
Bits 0 to 7 correspond to units 0 to 7.
Read-only
RS-232C Port PT Priority
Registered Flags
A393.08 to
A393.15
The corresponding bit will be ON for the PT that has pri-
ority when the serial port 2 is communicating in NT link
mode.
Read-only
RS-232C Port Reception
Counter
(No-protocol Mode)
A393.00 to
A393.15
Indicates (in binary) the number of bytes of data received
when serial port 2 is in no-protocol mode.
Read-only
Name Address Description Access Updated
Communications Unit, Port
Settings Changing Flags
(Units 0 to 15, ports 1 to 4)
A620.01 to
A635.04
The corresponding flag will be ON when the settings for
that port are being changed.
Read/write
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