271
Auxiliary Area and CIO Area Allocations Section 8-3
Note The baud rate that is input to the CPU Unit will depend on the setting in the
System Setup. If the default value is used because of a System Setup error,
this default setting is input.
Error Log EEPROM Error This bit will be set to 1 if an error occurs in reading or writing the error log
stored in EEPROM on the assumption that the EEPROM has reached its use-
ful life. If a Serial Communications Unit is being used, the ERC indicator will
also light. If a Serial Communications Board is being used, A42411 will turn
ON and the ERR/ALM indicator on the CPU Unit will flash, indicating a non-
fatal error.
Protocol Data Error This bit will be turned ON if a checksum error is detected in the protocol data
at startup. The checksum is checked for all serial communications modes. If a
Serial Communications Unit is being used, the ERC indicator will also flash. If
a Serial Communications Board is being used, A42409 will turn ON, the ERR/
ALM indicator on the CPU Unit will flash, and the RDY indicator will flash at 1-
second intervals, indicating a non-fatal error.
The operation of the 1:N NT Links will not be affected by a protocol data error.
Port Setting Status The settings in the Setup Area for the following items will be stored: Serial
communications mode, baud rate, start bits, data length, stop bits, parity,
ports, terminating resistance, terminating resistance, setup error, and port
operating/stopped status. The port operating/stopped status will always be 1
for 1:N NT Links.
Communications Status The flow control and buffer status is stored. This status is not used for 1:N NT
Links. These bits are cleared at startup or when a port is restarted using
STUP(237) or a Port Settings Change Bit (Auxiliary Area).
Transmission Control
Signal Status
The status of the transmission control signals is stored.
Protocol Status The bits corresponding to the unit numbers of the connected PTs for which
priority processing has been set and the bits corresponding to the unit num-
bers for which communications are being executed are turned ON.
Words Bit Contents
Boards
(CS Series Only)
Unit
(CS/CJ Series)
Port 1Port 2Port 1Port 2
CIO
1909
CIO
1919
n + 9 n + 19 15 to 08 PT Priority Registered Flag
07 to 00 PT Communications Execution Flag
CIO
1910 to
CIO
1914
CIO
1920 to
CIO
1924
n + 10 to
n + 14
n + 20 to
n + 24
15 to 00 Reserved
PT Priority Registered Flag
PT Communications Execution Flag
Unit No. 7 to Unit No. 0
Unit No. 7 to Unit No. 0
15 14 13 12 11 10 09 08 07 06 05 04 03 01 00
02
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