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Allocated CIO Area Words Section 3-2
11 COS Send
Failed Flag
ON Unit Indicates that an attempt was made to send COS to a Master using the
Slave COS send switch (Slave COS Send Switch in n+1) in Software
Switches 2, but the transmission failed.
The following may cause the failure of COS signal transmission.
• A COS connection was not established with a master.
• Bus OFF error occurred.
• A network power error occurred.
• A send timeout occurred.
Once this bit turns ON, it will remain ON until the operation is successfully
completed.
OFF Unit Indicates that the error has not occurred. The bit turns OFF when COS is
successfully sent.
12 Connection
2 Estab-
lished Flag
ON Unit Indicates that an I/O connection has been established for OUT 2/IN 2.
This bit turns ON even if valid I/O data has not been exchanged.
OFF Unit Indicates that an I/O connection has not been established for OUT 2/IN 2.
13 Connection
1 Estab-
lished Flag
ON Unit Indicates that an I/O connection has been established for OUT 1/IN 1.
This bit turns ON even if valid I/O data has not been exchanged.
OFF Unit Indicates that an I/O connection has not been established for OUT 1/IN 1.
14 Remote I/O
Communica-
tions Flag for
OUT 2/IN 2
ON Unit Indicates that an I/O connection has been established for OUT 2/IN 2 and
the slave is conducting normal remote I/O communications with the mas-
ter.
OFF Unit Indicates that an I/O connection has been established for OUT 2/IN 2 and
the slave is not conducting normal remote I/O communications with the
master.
Usage example: When writing the ladder program for slave remote I/O
communications, used a NO input conditions for this bit to control I/O pro-
cessing with the master.
15 Remote I/O
Communica-
tions Flag for
OUT 1/IN 1
ON Unit Indicates that an I/O connection has been established for OUT 1/IN 1 and
the Slave is conducting normal remote I/O communications with the Mas-
ter.
OFF Unit Indicates that an I/O connection has been established for OUT 1/IN 1 and
the slave is not conducting normal remote I/O communications with the
master.
Usage example: When writing the ladder program for slave remote I/O
communications, used a NO input conditions for this bit to control I/O pro-
cessing with the master.
Bit Name Status Controlled
by
Unit operation